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Chawla T, Hurrell C, Keough V, Lindquist CM, Mohammed MF, Samson C, Sugrue G, Walsh C. Canadian Association of Radiologists Practice Guidelines for Computed Tomography Colonography. Can Assoc Radiol J 2024; 75:54-68. [PMID: 37411043 DOI: 10.1177/08465371231182975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023] Open
Abstract
Colon cancer is the third most common malignancy in Canada. Computed tomography colonography (CTC) provides a creditable and validated option for colon screening and assessment of known pathology in patients for whom conventional colonoscopy is contraindicated or where patients self-select to use imaging as their primary modality for initial colonic assessment. This updated guideline aims to provide a toolkit for both experienced imagers (and technologists) and for those considering launching this examination in their practice. There is guidance for reporting, optimal exam preparation, tips for problem solving to attain high quality examinations in challenging scenarios as well as suggestions for ongoing maintenance of competence. We also provide insight into the role of artificial intelligence and the utility of CTC in tumour staging of colorectal cancer. The appendices provide more detailed guidance into bowel preparation and reporting templates as well as useful information on polyp stratification and management strategies. Reading this guideline should equip the reader with the knowledge base to perform colonography but also provide an unbiased overview of its role in colon screening compared with other screening options.
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Affiliation(s)
- Tanya Chawla
- Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada
- Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Casey Hurrell
- Canadian Association of Radiologists, Ottawa, Ontario, Canada
| | - Valerie Keough
- Department of Diagnostic Radiology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Chris M Lindquist
- Department of Radiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Mohammed F Mohammed
- Abdominal Radiology Section, Department of Radiology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Caroline Samson
- Département de Radiologie, Radio-oncologie et Médecine Nucléaire, Université de Montréal, Montreal, Quebec, Canada
| | - Gavin Sugrue
- Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Cynthia Walsh
- Department of Radiology, Radiation Oncology and Medical Physics, University of Ottawa, Ottawa, Ontario, Canada
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2
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Kim DH. CT Colonography Is the Perfect Colorectal Screening Test That Unfortunately Few People Use Yet. Korean J Radiol 2023; 24:79-82. [PMID: 36725349 PMCID: PMC9892224 DOI: 10.3348/kjr.2022.0969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 12/12/2022] [Indexed: 01/28/2023] Open
Affiliation(s)
- David H Kim
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
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3
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Sali L, Ventura L, Mascalchi M, Falchini M, Mallardi B, Carozzi F, Milani S, Zappa M, Grazzini G, Mantellini P. Single CT colonography versus three rounds of faecal immunochemical test for population-based screening of colorectal cancer (SAVE): a randomised controlled trial. Lancet Gastroenterol Hepatol 2022; 7:1016-1023. [PMID: 36116454 DOI: 10.1016/s2468-1253(22)00269-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Colorectal cancer screening is recommended for people aged 50-75 years, but the optimal screening test and strategy are not established. We aimed to compare single CT colonography versus three faecal immunochemical test (FIT) rounds for population-based screening of colorectal cancer. METHODS This randomised controlled trial was done in Florence, Italy. Adults aged 54-65 years, never screened for colorectal cancer, were randomly assigned (1:2) by simple randomisation and invited by post to either a single CT colonography (CT colonography group) or three FIT rounds (FIT group; each round was done 2 years apart). Exclusion criteria included previous colorectal cancer, advanced adenoma, or inflammatory bowel disease, colonoscopy within the last 5 years or FIT within the last 2 years, and severe medical conditions. Participants who had a colonic mass or at least one polyp of 6 mm or more in diameter in the CT colonography group and those who had at least 20 μg haemoglobin per g faeces in the FIT group were referred for work-up optical colonoscopy. The primary outcome was detection rate for advanced neoplasia. Outcomes were assessed in the modified intention-to-screen and per-protocol populations. The trial is registered with ClinicalTrials.gov, NCT01651624. FINDINGS From Dec 12, 2012, to March 5, 2018, 14 981 adults were randomised and invited to screening interventions. 5242 (35·0%) individuals (2809 [53·6%] women and 2433 [46·4%] men) were assigned to the CT colonography group and 9739 (65·0%) individuals (5208 [53·5%] women and 4531 [46·5%] men) were assigned to the FIT group. Participation in the screening intervention was lower in the CT colonography group (1286 [26·7%] of the 4825 eligible invitees) than it was for the FIT group (6027 [64·9%] of the 9288 eligible invitees took part in at least one screening round, 4573 [49·2%] in at least two rounds, and 3105 [33·4%] in all three rounds). The detection rate for advanced neoplasia of CT colonography was significantly lower than the detection rate after three FIT rounds (1·4% [95% CI 1·1-1·8] vs 2·0% [1·7-2·3]; p=0·0094) in the modified intention-to-screen analysis, but the detection rate was significantly higher in the CT colonography group than in the FIT group (5·2% [95% CI 4·1-6·6] vs 3·1% [2·7-3·6]; p=0·0002]) in the per-protocol analysis. Referral rate to work-up optical colonoscopy (the secondary outcome of the trial) was significantly lower for the CT colonography group than for the FIT group after three FIT rounds (2·7% [95% CI 2·2-3·1] vs 7·5% [7·0-8·1]; p<0·0001) in the modified intention-to-screen analysis, whereas no significant difference was observed in the per-protocol analysis (10·0% [8·4-11·8] vs 11·6% [10·8-12·4]). No major complications were observed in the CT colonography group after screening and work-up optical colonoscopy, whereas three cases of bleeding were reported in the FIT group after work-up optical colonoscopy (two after the first FIT and one after the second FIT). INTERPRETATION Greater participation makes FIT more efficient than single CT colonography for detection of advanced neoplasia in population screening for colorectal cancer. Nonetheless, higher detection rate in participants and fewer work-up colonoscopies are possible advantages of CT colonography as a screening tool, which might deserve consideration in future trials. FUNDING Government of Tuscany and Cassa di Risparmio di Firenze Foundation. TRANSLATION For the Italian translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Lapo Sali
- Department of Biomedical, Experimental and Clinical Sciences Mario Serio, University of Florence, Florence, Italy; Department of Radiology, Istituto Fiorentino di Cura e Assistenza Hospital, Florence, Italy.
| | - Leonardo Ventura
- Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Mario Mascalchi
- Department of Biomedical, Experimental and Clinical Sciences Mario Serio, University of Florence, Florence, Italy; Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Massimo Falchini
- Department of Biomedical, Experimental and Clinical Sciences Mario Serio, University of Florence, Florence, Italy
| | - Beatrice Mallardi
- Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Francesca Carozzi
- Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Stefano Milani
- Department of Biomedical, Experimental and Clinical Sciences Mario Serio, University of Florence, Florence, Italy
| | - Marco Zappa
- Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Grazia Grazzini
- Oncological Network, Prevention and Research Institute, Florence, Italy
| | - Paola Mantellini
- Oncological Network, Prevention and Research Institute, Florence, Italy
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4
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Hao Q, Qin D, Li Z, Dong N, Zhang S. Detection methods of synchronous colorectal lesions in proximal colon for patients with obstructive colorectal cancer: a literature review. Expert Rev Gastroenterol Hepatol 2022; 16:511-519. [PMID: 35673978 DOI: 10.1080/17474124.2022.2085555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
INTRODUCTION Colorectal cancer holds a high morbidity and mortality rate. As a common method for colorectal cancer detection, colonoscopy has difficulty in passing through the malignant stenosis in patients with obstructive colorectal cancer, which results in incomplete detection and missed diagnosis. The missed synchronous lesions increase the risk of metachronous cancer. Therefore, detecting proximal synchronous lesions in patients with obstructive colorectal cancer should be appreciated before operation. AREA COVERED This review evaluates related literature, aiming at providing clinicians with more ideas and attention for detecting proximal synchronous lesions in patients with obstructive colorectal cancer. EXPERT OPINION In patients with obstructive colorectal cancer, missed diagnosis of lesions proximal to the obstruction may lead to metachronous colorectal cancer. Except for preoperative colonoscopy which is difficult to pass through malignant stenosis, other methods that can evaluate proximal colon segment are critical. This article introduced several preoperative, intraoperative and postoperative measures for synchronous lesions detection. The choice of methods should base on patients' conditions, aiming at a high diagnostic yield and low risk. Early detection and resection of synchronous lesions in the proximal section of malignant obstruction are expected to minimize the risk of metachronous colorectal cancer and even effect follow-up treatment strategy, which deserves the attention of clinicians.
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Affiliation(s)
- Qiyuan Hao
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, Peking, China.,National Clinical Research Center for Digestive Diseases, Beijing, Peking, China.,Beijing Digestive Disease Center, Beijing, Peking, China
| | - Da Qin
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, Peking, China.,National Clinical Research Center for Digestive Diseases, Beijing, Peking, China.,Beijing Digestive Disease Center, Beijing, Peking, China
| | - Zhiyu Li
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, Peking, China.,National Clinical Research Center for Digestive Diseases, Beijing, Peking, China.,Beijing Digestive Disease Center, Beijing, Peking, China
| | - Ningning Dong
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, Peking, China.,National Clinical Research Center for Digestive Diseases, Beijing, Peking, China.,Beijing Digestive Disease Center, Beijing, Peking, China
| | - Shutian Zhang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, Peking, China.,National Clinical Research Center for Digestive Diseases, Beijing, Peking, China.,Beijing Digestive Disease Center, Beijing, Peking, China
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Lammertink MHA, Huisman JF, Bernsen MLE, Niekel RAM, van Westreenen HL, de Vos Tot Nederveen Cappel WH, Spanier BWM. Implications of colonic and extra-colonic findings on CT colonography in FIT positive patients in the Dutch bowel cancer screening program. Scand J Gastroenterol 2021; 56:1337-1342. [PMID: 34506230 DOI: 10.1080/00365521.2021.1966091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVES In the Dutch National colorectal cancer (CRC) screening program, patients with a positive faecal immunochemical test (FIT) are referred for a colonoscopy. In a small proportion, because of contraindications, a computed tomographic colonography (CTC) is performed to rule out advanced neoplasia. The aim of our study is to evaluate the intra- and extra-colonic yield of CTC and its clinical implications. MATERIALS AND METHODS In this retrospective cohort study, all FIT positive patients who underwent primary (instead of colonoscopy) or secondary CTC (after incomplete colonoscopy) between January 2014 and January 2018 were included. Relevant intra-colonic lesions on CTC were defined as lesions suspected for CRC or >10 mm. Relevant extra-colonic findings were defined as E3 and E4 using the E-RADS classification. RESULTS Of the 268 included patients, 66 (24.6%) were suspected to have CRC or 10 mm + lesion on CTC and 56 of them (84.8%) underwent an additional endoscopy. Another 20 patients with <10 mm lesions on CTC underwent additional endoscopy. Overall, 76/268 patients (28.4%) underwent confirmatory endoscopy of which 50 (18.7%) had histologic confirmed advanced neoplasia; 4.9% had CRC and 13.8% advanced adenoma. New relevant extra-colonic findings were detected in 13.8%. CONCLUSIONS In the Dutch National CRC screening program, a CTC was followed by an endoscopic procedure in more than a quarter of patients, resulting in a significant number of advanced neoplasia. Overall, one out of seven CTCs showed new relevant extra-colonic findings which may lead to further diagnostic/therapeutic work-up. Our results can be important for the informed consent procedure.
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Affiliation(s)
- Marieke H A Lammertink
- Department of Gastroenterology and Hepatology, Rijnstate Hospital, Arnhem, The Netherlands
| | - Jelle F Huisman
- Department of Gastroenterology and Hepatology, Isala Hospital, Zwolle, The Netherlands
| | - Marie L E Bernsen
- Department of Radiology, Rijnstate Hospital, Arnhem, The Netherlands
| | - Ronald A M Niekel
- Department of Radiology, Rijnstate Hospital, Arnhem, The Netherlands
| | | | | | - Bernhard W M Spanier
- Department of Gastroenterology and Hepatology, Rijnstate Hospital, Arnhem, The Netherlands
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6
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Benamouzig R, Barré S, Saurin JC, Leleu H, Vimont A, Taleb S, De Bels F. Cost-effectiveness analysis of alternative colorectal cancer screening strategies in high-risk individuals. Therap Adv Gastroenterol 2021; 14:17562848211002359. [PMID: 33953799 PMCID: PMC8042553 DOI: 10.1177/17562848211002359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 02/15/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND AND AIMS Current guidelines recommend colonoscopy every 3-5 years for colorectal cancer (CRC) screening of individuals with a familial history of CRC. The objective of this study was to compare the cost effectiveness of screening alternatives in this population. METHODS Eight screening strategies were compared with no screening: fecal immunochemical test (FIT), Stool DNA and blood-based screening every 2 years, colonoscopy, computed tomography colonography, colon capsules, and sigmoidoscopy every 5 years, and colonoscopy at 45 years followed, if negative, by FIT every 2 years. Screening test and procedures performance were obtained from the literature. A microsimulation model reproducing the natural history of CRC was used to estimate the cost (€2018) and effectiveness [quality-adjusted life-years (QALYs)] of each strategy. A lifetime horizon was used. Costs and effectiveness were discounted at 3.5% annually. RESULTS Compared with no screening, colonoscopy and sigmoidoscopy at a 30% uptake were the most effective strategy (46.3 and 43.9 QALY/1000). FIT at a 30 µg/g threshold with 30% uptake was only half as effective (25.7 QALY). Colonoscopy was associated with a cost of €484,000 per 1000 individuals whereas sigmoidoscopy and FIT were associated with much lower costs (€123,610 and €66,860). Incremental cost-effectiveness rate for FIT and sigmoidoscopy were €2600/QALY (versus no screening) and €3100/QALY (versus FIT), respectively, whereas it was €150,000/QALY for colonoscopy (versus sigmoidoscopy). With a lower threshold (10 µg/g) and a higher uptake of 45%, FIT was more effective and less costly than colonoscopy at a 30% uptake and was associated with an incremental cost-effectiveness ratio (ICER) of €4240/QALY versus no screening. CONCLUSION At 30% uptake, current screening is the most effective screening strategy for high-risk individuals but is associated with a high ICER. Sigmoidoscopy and FIT at lower thresholds (10 µg/g) and a higher uptake should be given consideration as cost-effective alternatives. PLAIN LANGUAGE SUMMARY Cost-effectiveness analysis of colorectal cancer screening strategies in high-risk individuals Fecal occult blood testing with an immunochemical test (FIT) is generally considered as the most cost-effective alternative in colorectal cancer screening programs for average risk individuals without family history.Current screening guidelines for high-risk individuals with familial history recommend colonoscopy every 3-5 years.Colonoscopy every 3-5 years for individuals with familial history is the most effective strategy but is associated with a high incremental cost-effectiveness ratio.Compared with colonoscopy, if screening based on FIT is associated with a higher participation rate, it can achieve a similar effectiveness at a lower cost.
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Affiliation(s)
- Robert Benamouzig
- Department of Gastroenterology, Hôpital Avicenne (AP-HP), Bobigny, France
| | | | - Jean-Christophe Saurin
- Department of Endoscopy and Gastroenterology, Pavillon L, Edouard Herriot Hospital (Hospices Civils de Lyon), Lyon, France
| | - Henri Leleu
- Public Health Expertise, 157 rue du faubourg saint-Antoine, Paris, 75011, France
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7
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Njølstad T, Young VS, Drolsum A, Dormagen JB, Hofstad B, Schulz A. Is there need for routine CT colonography after CT-verified uncomplicated diverticulitis of the sigmoid colon? Eur J Radiol Open 2021; 8:100341. [PMID: 33898653 PMCID: PMC8053813 DOI: 10.1016/j.ejro.2021.100341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/11/2021] [Accepted: 03/17/2021] [Indexed: 10/25/2022] Open
Abstract
Background Following an episode of acute diverticulitis, surgical guidelines commonly advise routine colonic follow-up to rule out underlying malignancy. However, as a CT of the abdomen is frequently performed during clinical work-up, the routine need for colonic follow-up has become debated. Purpose To evaluate the need for routine CT colonography after an episode of CT-verified uncomplicated sigmoid diverticulitis to rule out underlying colorectal malignancy. Material and methods This study retrospectively evaluated 312 patients routinely referred to colonic evaluation by CT colonography following an episode of acute diverticulitis. Patients were excluded if lacking diagnostic CT of the abdomen at time of diagnosis, if presenting with atypical colonic involvement, or if CT findings were suggestive of complicated disease (e.g., abscess or perforation). CT colonography exams were routinely reviewed by experienced abdominal radiology consultants on the day of the procedure. If significant polyps were detected, or if colorectal malignancy could not be excluded, patients were referred to same-day optical colonoscopy. For these patients, medical records were reviewed for optical colonoscopy results and histology reports if applicable. Results Among 223 patients with CT-verified uncomplicated sigmoid diverticulitis, no patients were found to have underlying colorectal malignancy. 27 patients were referred to optical colonoscopy based on CT colonography findings. 18 patients consequently underwent polypectomy, all with either hyperplastic or adenomatous histology. Conclusions This study indicates that routine colonic evaluation by CT colonography following an episode of CT-verified uncomplicated sigmoid diverticulitis may be unwarranted, and should arguably be reserved for patients with protracted or atypical clinical course.
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Affiliation(s)
- Tormund Njølstad
- Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway.,Department of Radiology, Haukeland University Hospital, Bergen, Norway
| | - Victoria Solveig Young
- Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway
| | - Anders Drolsum
- Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway
| | - Johann Baptist Dormagen
- Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway
| | - Bjørn Hofstad
- Department of Gastroenterology, Oslo University Hospital, Oslo, Norway
| | - Anselm Schulz
- Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway
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8
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CT colonography's role in the COVID-19 pandemic: a safe(r), socially distanced total colon examination. Abdom Radiol (NY) 2021; 46:486-490. [PMID: 32748251 PMCID: PMC7398602 DOI: 10.1007/s00261-020-02674-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/12/2020] [Accepted: 07/18/2020] [Indexed: 12/14/2022]
Abstract
Purpose To describe the favorable procedural profile of CT colonography (CTC) during the COVID-19 pandemic. Conclusion Postponement of cancer screening due to COVID-19 has resulted in a backlog of individuals needing to undergo structural examination of the colon. The experience during the initial COVID-19 surge with urgent evaluation of the colon for transplant patients prior to transplant suggests that CTC can be done in a lower risk manner as compared to other structural examinations. The procedural profile of CTC is advantageous during this pandemic as maintaining social distancing and preserving healthcare supplies including PPE are of paramount importance. CTC is an important option to utilize in the screening armamentarium to allow effective screening of average risk asymptomatic individuals in the COVID-19 era.
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Spada C, Hassan C, Bellini D, Burling D, Cappello G, Carretero C, Dekker E, Eliakim R, de Haan M, Kaminski MF, Koulaouzidis A, Laghi A, Lefere P, Mang T, Milluzzo SM, Morrin M, McNamara D, Neri E, Pecere S, Pioche M, Plumb A, Rondonotti E, Spaander MC, Taylor S, Fernandez-Urien I, van Hooft JE, Stoker J, Regge D. Imaging alternatives to colonoscopy: CT colonography and colon capsule. European Society of Gastrointestinal Endoscopy (ESGE) and European Society of Gastrointestinal and Abdominal Radiology (ESGAR) Guideline - Update 2020. Endoscopy 2020; 52:1127-1141. [PMID: 33105507 DOI: 10.1055/a-1258-4819] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
1: ESGE/ESGAR recommend computed tomographic colonography (CTC) as the radiological examination of choice for the diagnosis of colorectal neoplasia.Strong recommendation, high quality evidence.ESGE/ESGAR do not recommend barium enema in this setting.Strong recommendation, high quality evidence. 2: ESGE/ESGAR recommend CTC, preferably the same or next day, if colonoscopy is incomplete. The timing depends on an interdisciplinary decision including endoscopic and radiological factors.Strong recommendation, low quality evidence.ESGE/ESGAR suggests that, in centers with expertise in and availability of colon capsule endoscopy (CCE), CCE preferably the same or the next day may be considered if colonoscopy is incomplete.Weak recommendation, low quality evidence. 3: When colonoscopy is contraindicated or not possible, ESGE/ESGAR recommend CTC as an acceptable and equally sensitive alternative for patients with alarm symptoms.Strong recommendation, high quality evidence.Because of lack of direct evidence, ESGE/ESGAR do not recommend CCE in this situation.Very low quality evidence.ESGE/ESGAR recommend CTC as an acceptable alternative to colonoscopy for patients with non-alarm symptoms.Strong recommendation, high quality evidence.In centers with availability, ESGE/ESGAR suggests that CCE may be considered in patients with non-alarm symptoms.Weak recommendation, low quality evidence. 4: Where there is no organized fecal immunochemical test (FIT)-based population colorectal screening program, ESGE/ESGAR recommend CTC as an option for colorectal cancer screening, providing the screenee is adequately informed about test characteristics, benefits, and risks, and depending on local service- and patient-related factors.Strong recommendation, high quality evidence.ESGE/ESGAR do not suggest CCE as a first-line screening test for colorectal cancer.Weak recommendation, low quality evidence. 5: ESGE/ESGAR recommend CTC in the case of a positive fecal occult blood test (FOBT) or FIT with incomplete or unfeasible colonoscopy, within organized population screening programs.Strong recommendation, moderate quality evidence.ESGE/ESGAR also suggest the use of CCE in this setting based on availability.Weak recommendation, moderate quality evidence. 6: ESGE/ESGAR suggest CTC with intravenous contrast medium injection for surveillance after curative-intent resection of colorectal cancer only in patients in whom colonoscopy is contraindicated or unfeasibleWeak recommendation, low quality evidence.There is insufficient evidence to recommend CCE in this setting.Very low quality evidence. 7: ESGE/ESGAR suggest CTC in patients with high risk polyps undergoing surveillance after polypectomy only when colonoscopy is unfeasible.Weak recommendation, low quality evidence.There is insufficient evidence to recommend CCE in post-polypectomy surveillance.Very low quality evidence. 8: ESGE/ESGAR recommend against CTC in patients with acute colonic inflammation and in those who have recently undergone colorectal surgery, pending a multidisciplinary evaluation.Strong recommendation, low quality evidence. 9: ESGE/ESGAR recommend referral for endoscopic polypectomy in patients with at least one polyp ≥ 6 mm detected at CTC or CCE.Follow-up CTC may be clinically considered for 6 - 9-mm CTC-detected lesions if patients do not undergo polypectomy because of patient choice, comorbidity, and/or low risk profile for advanced neoplasia.Strong recommendation, moderate quality evidence.
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Affiliation(s)
- Cristiano Spada
- Digestive Endoscopy Unit and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy.,Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Cesare Hassan
- Gastroenterology Unit, Nuovo Regina Margherita Hospital, Rome, Italy
| | - Davide Bellini
- Department of Radiological Sciences, Oncology and Pathology, La Sapienza University of Rome, Diagnostic Imaging Unit, I.C.O.T. Hospital Latina, Italy
| | | | - Giovanni Cappello
- Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin, Italy
| | - Cristina Carretero
- Department of Gastroenterology. University of Navarre Clinic, Healthcare Research Institute of Navarre, Pamplona, Spain
| | - Evelien Dekker
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Center location AMC, The Netherlands
| | - Rami Eliakim
- Department of Gastroenterology, Sheba Medical Center , Sackler School of Medicine, Tel-Aviv, Israel
| | - Margriet de Haan
- Department of Radiology, University Medical Center, Utrecht, The Netherlands
| | - Michal F Kaminski
- Departments of Gastroenterological Oncology and Cancer Prevention, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Anastasios Koulaouzidis
- Endoscopy Unit, Centre for Liver and Digestive Disorders, University Hospitals, NHS Lothian, Edinburgh, UK
| | - Andrea Laghi
- Department of Surgical-Medical Sciences and Translational Medicine, La Sapienza University of Rome, Italy
| | - Philippe Lefere
- Department of Radiology, Stedelijk Ziekenhuis, Roeselare, Belgium
| | - Thomas Mang
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Sebastian Manuel Milluzzo
- Digestive Endoscopy Unit and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy.,Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Martina Morrin
- RCSI Radiology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Deirdre McNamara
- TAGG Research Centre, Department of Clinical Medicine, Trinity Centre, Tallaght Hospital, Dublin, Ireland
| | - Emanuele Neri
- Diagnostic Radiology 3, Department of Translational Research, University of Pisa, Italy
| | - Silvia Pecere
- Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Mathieu Pioche
- Endoscopy and Gastroenterology Unit, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France
| | - Andrew Plumb
- Centre for Medical Imaging, University College London, London, UK
| | | | - Manon Cw Spaander
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Stuart Taylor
- Centre for Medical Imaging, University College London, London, UK
| | | | - Jeanin E van Hooft
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, The Netherlands
| | - Jaap Stoker
- Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Daniele Regge
- Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin, Italy.,University of Turin Medical School, Turin, Italy
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Spada C, Hassan C, Bellini D, Burling D, Cappello G, Carretero C, Dekker E, Eliakim R, de Haan M, Kaminski MF, Koulaouzidis A, Laghi A, Lefere P, Mang T, Milluzzo SM, Morrin M, McNamara D, Neri E, Pecere S, Pioche M, Plumb A, Rondonotti E, Spaander MC, Taylor S, Fernandez-Urien I, van Hooft JE, Stoker J, Regge D. Imaging alternatives to colonoscopy: CT colonography and colon capsule. European Society of Gastrointestinal Endoscopy (ESGE) and European Society of Gastrointestinal and Abdominal Radiology (ESGAR) Guideline – Update 2020. Eur Radiol 2020; 31:2967-2982. [PMID: 33104846 DOI: 10.1007/s00330-020-07413-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Cristiano Spada
- Digestive Endoscopy Unit and Gastronenterology, Fondazione Poliambulanza, Brescia, Italy.
- Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy.
| | - Cesare Hassan
- Gastroenterology Unit, Nuovo Regina Margherita Hospital, Rome, Italy
| | - Davide Bellini
- Department of Radiological Sciences, Oncology and Pathology, Diagnostic Imaging Unit, La Sapienza University of Rome, I.C.O.T. Hospital, Latina, Italy
| | | | - Giovanni Cappello
- Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin, Italy
| | - Cristina Carretero
- Department of Gastroenterology, University of Navarre Clinic, Healthcare Research Institute of Navarre, Pamplona, Spain
| | - Evelien Dekker
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Center location AMC, Amsterdam, The Netherlands
| | - Rami Eliakim
- Department of Gastroenterology, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv, Israel
| | - Margriet de Haan
- Department of Radiology, University Medical Center, Utrecht, The Netherlands
| | - Michal F Kaminski
- Departments of Gastroenterological Oncology and Cancer Prevention, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Anastasios Koulaouzidis
- Endoscopy Unit, Centre for Liver and Digestive Disorders, University Hospitals, NHS Lothian, Edinburgh, UK
| | - Andrea Laghi
- Department of Surgical-Medical Sciences and Translational Medicine, La Sapienza University of Rome, Rome, Italy
| | - Philippe Lefere
- Department of Radiology, Stedelijk Ziekenhuis, Roeselare, Belgium
| | - Thomas Mang
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Sebastian Manuel Milluzzo
- Digestive Endoscopy Unit and Gastronenterology, Fondazione Poliambulanza, Brescia, Italy
- Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Martina Morrin
- RCSI Radiology, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Deirdre McNamara
- TAGG Research Centre, Department of Clinical Medicine, Trinity Centre, Tallaght Hospital, Dublin, Ireland
| | - Emanuele Neri
- Diagnostic Radiology 3, Department of Translational Research, University of Pisa, Pisa, Italy
| | - Silvia Pecere
- Department of Gastroenterology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Mathieu Pioche
- Endoscopy and Gastroenterology Unit, Edouard Herriot Hospital, Hospices Civils de Lyon, Lyon, France
| | - Andrew Plumb
- Centre for Medical Imaging, University College London, London, UK
| | | | - Manon Cw Spaander
- Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Stuart Taylor
- Centre for Medical Imaging, University College London, London, UK
| | | | - Jeanin E van Hooft
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jaap Stoker
- Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Daniele Regge
- Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin, Italy
- University of Turin Medical School, Turin, Italy
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11
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Barré S, Leleu H, Benamouzig R, Saurin JC, Vimont A, Taleb S, De Bels F. Cost-effectiveness analysis of alternative colon cancer screening strategies in the context of the French national screening program. Therap Adv Gastroenterol 2020; 13:1756284820953364. [PMID: 33014138 PMCID: PMC7509710 DOI: 10.1177/1756284820953364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 07/31/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND A nationwide colorectal cancer (CRC) screening program was set up in France from 2009 for average-risk, asymptomatic people aged 50-74 years based on an immunochemical fecal occult blood test [faecal immunochemical test (FIT)] every 2 years, followed by colonoscopy if positive. The European standard recommends a participation rate of 45% for the program to be cost-effective, yet the latest published rate in France was 34%. The objective of this study was to compare the cost effectiveness of screening alternatives taking real-world participation rates into account. METHODS Eight screening strategies were compared, based either on a screening test (Guaiac or FIT testing, blood-based, stool DNA, computed tomography colonography, colon capsules, and sigmoidoscopy) followed by full colonoscopy if positive or direct colonoscopy. A microsimulation model was used to estimate the cost effectiveness associated with each strategy. RESULTS Compared with no screening, FIT was associated with a 14.0 quality-adjusted life year (QALY) increase of €50,520 per 1000 individuals, giving an incremental cost-effectiveness ratio (ICER) of €3600/QALY. Only stool DNA and blood-based testing were associated with a QALY increase compared with FIT, with stool DNA weakly dominated by blood-based testing, and the latter associated with an ICER of €154,600/QALY compared with FIT. All other strategies were dominated by FIT. CONCLUSION FIT every 2 years appears to be the most cost-effective CRC screening strategy when taking into account a real-world participation rate of 34%.
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Affiliation(s)
| | - Henri Leleu
- Public Health Expertise, 157 Rue du Faubourg Saint-Antoine, Paris, 75011, France
| | - R. Benamouzig
- Department of Gastroenterology, Hôpital Avicenne (AP-HP), Bobigny, France
| | - Jean-Christophe Saurin
- Department of Endoscopy and Gastroenterology, Pavillon L, Edouard Herriot Hospital (Hospices Civils de Lyon), Lyon, France
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12
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Ricci ZJ, Kobi M, Flusberg M, Yee J. CT Colonography in Review With Tips and Tricks to Improve Performance. Semin Roentgenol 2020; 56:140-151. [PMID: 33858640 DOI: 10.1053/j.ro.2020.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zina J Ricci
- Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY.
| | - Mariya Kobi
- Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY
| | - Milana Flusberg
- Westchester Medical Center/New York Medical College, Valhalla, NY
| | - Judy Yee
- Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY
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13
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Laghi A. ¿Cómo pueden contribuir los radiólogos a mejorar la detección sistemática del cáncer colorrectal? RADIOLOGIA 2020; 62:87-89. [DOI: 10.1016/j.rx.2019.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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How can radiologists be helpful in improving colo-rectal cancer screening? RADIOLOGIA 2020. [DOI: 10.1016/j.rxeng.2020.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Schonberger M, Lefere P, Dachman AH. Pearls and Pitfalls of Interpretation in CT Colonography. Can Assoc Radiol J 2020; 71:140-148. [PMID: 32063002 DOI: 10.1177/0846537119892881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The accuracy of computed tomography (CT) colonography (CTC) requires that the radiologist be well trained in the recognition of pitfalls of interpretation. In order to achieve a high sensitivity and specificity, the interpreting radiologist must be well versed in the causes of both false-positive and false-negative results. In this article, we review the common and uncommon pitfalls of interpretation in CTC.
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Affiliation(s)
- Michael Schonberger
- Department of Radiology, The University of Chicago Medicine, Chicago, IL, USA
| | - Philippe Lefere
- Department of Radiology, Stedelijk Ziekenhuis, Roeselare, Belgium
| | - Abraham H Dachman
- Department of Radiology, The University of Chicago Medicine, Chicago, IL, USA
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16
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Abstract
CLINICAL PROBLEM Colorectal cancer (CRC) is a major cause of cancer-related morbidity and mortality. Most colorectal cancers derive from benign precursor lesions, so-called adenomatous polyps, over a long period of time. Colorectal cancer screening is based on the detection of precancerous polyps and early stage CRC in asymptomatic individuals to reduce CRC incidence and mortality. The protective effect of screening programs can be improved by increasing the screening rates. PRACTICAL RECOMMENDATIONS Apart from the established examinations, CT colonography (CTC) has been proposed as an optional test for colorectal cancer screening. The detection rates of CTC for large polyps and cancer are similar to the ones of colonoscopy and superior to stool-based tests. CTC is therefore the radiological test of choice for the detection of colorectal neoplasia. It has replaced double contrast barium enema for almost all indications. As a minimally invasive procedure, CTC has a high safety profile and good patient acceptance. The evaluation of extracolonic organs in addition to the colon can increase examination efficacy. The option to choose CTC as a CRC screening test has the potential to increase the overall screening rates.
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17
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Meiklejohn DJ, Ridley LJ, Ngu MC, Cowlishaw JL, Duller A, Ridley W. Utility of minimal preparation computed tomography colonography in detecting colorectal cancer in elderly and frail patients. Intern Med J 2019; 48:1492-1498. [PMID: 29893053 DOI: 10.1111/imj.13999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/03/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND Colorectal cancers result in substantial morbidity and mortality to the Australian society each year. The usual investigation for bowel malignancy is optical colonoscopy (OC), with computed tomography colonography (CTC) used as an alternative investigation. The catharsis and colon insufflation associated with these investigations pose a higher risk in the elderly and frail. Risks include perforation, serum electrolyte disturbance and anaesthesia/sedation risks. Minimal preparation computed tomography colonography (MPCTC) eliminates these risks. AIMS To audit the accuracy of a MPCTC programme for the investigation of colonic masses in symptomatic elderly and frail patients. METHODS This paper audits a 6-year period of MPCTC in an Australian tertiary referral hospital. A total of 145 patients underwent MPCTC during the study period. RESULTS There were seven true positives, two false positives and two false negatives. Analysis of this population indicates a sensitivity of 0.78 (95% CI 0.51-1.05), specificity of 0.99 (95% CI 0.97-1.01), positive predictive value (PPV) of 0.78 (95% CI 0.51-1.05) and negative predictive value (NPV) of 0.99 (95% CI 0.97-1.01). These findings are concordant with other published studies. CONCLUSIONS This audit confirms that minimal preparation CT colonography is a reasonable alternative to OC and CTC in detecting colorectal cancer in symptomatic elderly and frail patients, without the procedural risks inherent in more invasive investigations. For most patients, MPCTC ruled out significant colorectal carcinoma with a high NPV.
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Affiliation(s)
- David J Meiklejohn
- Department of Radiology, Concord Repatriation General Hospital, Sydney, New South Wales, Australia
| | - Lloyd J Ridley
- Department of Radiology, Concord Repatriation General Hospital, Sydney, New South Wales, Australia.,Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Meng C Ngu
- Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia.,Department of Gastroenterology, Concord Repatriation General Hospital, Sydney, New South Wales, Australia
| | - James L Cowlishaw
- Concord Repatriation General Hospital, Sydney, New South Wales, Australia
| | - Alex Duller
- Faculty of Medicine, University of New England, Sydney, New South Wales, Australia
| | - William Ridley
- Faculty of Medicine, University of New England, Sydney, New South Wales, Australia
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18
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Thorén F, Johnsson ÅA, Brandberg J, Hellström M. CT colonography: implementation, indications, and technical performance - a follow-up national survey. Acta Radiol 2019; 60:271-277. [PMID: 29898606 DOI: 10.1177/0284185118780899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Computed tomography colonography (CTC) is an accepted complement or alternative to optical colonoscopy (OC) but its implementation is incompletely analyzed, and technical performance varies between centers. PURPOSE To evaluate implementation, indications, and technical performance of CTC in Sweden and to evaluate compliance to international guidelines. MATERIAL AND METHODS A structured, self-assessed questionnaire regarding implementation and technical performance of CTC was sent to all eligible radiology departments in Sweden. Eighty-six out of 89 departments replied. Comparisons were made with similar national surveys from 2004 and 2009. RESULTS The number of centers performing CTC gradually increased from 23 in 2004 to 77 in 2016. In parallel, centers performing barium enema (BE) examinations have decreased from 89 in 2004 to 13 in 2016. Main reasons stated for still performing BE were lack of resources regarding CTC/OC. Main reasons for not performing CTC were lack of suitable software, lack of machine/reading time, and lack of experience. The majority of centers follow international CTC guidelines. An important exception is fecal tagging, which was implemented in only 63% of the centers. Incomplete OC remains a major indication for CTC, while preoperative CTC in colorectal cancer and follow-up after diverticulitis have emerged as new indications. CONCLUSION CTC today is well implemented in routine healthcare but still lacking in capacity. Indications have expanded over time, and most departments perform "state of the art" CTC, although fecal tagging is incompletely implemented.
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19
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Plumb AA, Eason D, Goldstein M, Lowe A, Morrin M, Rudralingam V, Tolan D, Thrower A. Computed tomographic colonography for diagnosis of early cancer and polyps? Colorectal Dis 2019; 21 Suppl 1:23-28. [PMID: 30809907 DOI: 10.1111/codi.14490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 10/08/2018] [Indexed: 02/08/2023]
Affiliation(s)
- A A Plumb
- Centre for Medical Imaging, University College London, London, UK
| | - D Eason
- Department of Radiology, Raigmore Hospital, Inverness, UK
| | - M Goldstein
- Department of Radiology, Heart of England NHS Trust, Birmingham, UK
| | - A Lowe
- Department of Radiology, Musgrove Park Hospital, Taunton, UK
| | - M Morrin
- Department of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland
| | - V Rudralingam
- Department of Radiology, Wythenshawe Hospital, Manchester Foundation Trust, Manchester, UK
| | - D Tolan
- Department of Radiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - A Thrower
- Department of Radiology, Basingstoke Hospital, Basingstoke, UK
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20
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Sehgal R, Whitehead-Clarke T, Tudyka V, Evans S. Computed tomography colonography: a new threat to the spleen? Ann R Coll Surg Engl 2018; 101:e11-e13. [PMID: 30286660 DOI: 10.1308/rcsann.2018.0159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We present a rare and previously undocumented potential complication of computed tomography (CT) colonography. CT colonography is a commonly performed investigation with a relatively low risk of complications. While splenic injury is a well-documented complication after colonoscopy, it has never been reported following CT colonography. A 64-year-old man presented with severe abdominal pain four hours after CT colonography. CT of his abdomen and pelvis revealed appearances consistent with intra-abdominal bleeding secondary to splenic injury. The patient immediately underwent an emergency laparotomy and splenectomy, revealing a grade III splenic capsular tear. Histological evaluation of splenic tissue showed normal morphology with no evidence of malignancy. While the aetiology of the patient's splenic injury remains uncertain, normal histopathology and the chronology of events represents an almost certain link to CT colonography.
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Affiliation(s)
- R Sehgal
- Department of Emergency Surgery, Kingston Hospital NHS Foundation Trust , Kingston upon Thames , UK
| | - T Whitehead-Clarke
- Department of Emergency Surgery, Kingston Hospital NHS Foundation Trust , Kingston upon Thames , UK
| | - V Tudyka
- Department of Emergency Surgery, Kingston Hospital NHS Foundation Trust , Kingston upon Thames , UK
| | - S Evans
- Radiology Department, Kingston Hospital NHS Foundation Trust , Kingston upon Thames , UK
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21
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Kim DH, Moreno CC, Pickhardt PJ. Computed Tomography Colonography: Pearls and Pitfalls. Radiol Clin North Am 2018; 56:719-735. [PMID: 30119770 DOI: 10.1016/j.rcl.2018.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This article serves as a practical reference to optimize the performance of computed tomography colonography in the detection of colorectal neoplasia. A specific protocol in use at 2 US university programs as well as defined interpretation strategies will be described. With this framework in place, various clinical pearls as well as pitfalls to avoid will be a major focus of this article.
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Affiliation(s)
- David H Kim
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/311 Clinical Science Center, 600 Highland Avenue, Madison, WI 53792-3252, USA.
| | - Courtney C Moreno
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, 1365 Clifton Road, Northeast, Atlanta, GA 30322, USA
| | - Perry J Pickhardt
- Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/311 Clinical Science Center, 600 Highland Avenue, Madison, WI 53792-3252, USA
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22
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Tonolini M, Ippolito S. Imaging the operated colon using water-enema multidetector CT, with emphasis on surgical anastomoses. Insights Imaging 2018; 9:413-423. [PMID: 29633171 PMCID: PMC6108969 DOI: 10.1007/s13244-018-0612-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 01/07/2023] Open
Abstract
Water-enema multidetector CT (WE-MDCT) provides a detailed multiplanar visualisation of mural, intra- and extraluminal abnormalities of the large bowel, relying on preliminary bowel cleansing, retrograde luminal distension, pharmacological hypotonisation and intravenous contrast enhancement. In patients with a history of colorectal surgery for either carcinoma or Crohn's disease (CD), WE-MDCT may also be performed via a colostomy, which allows depicting the anatomy and position of the residual large bowel and evaluates the calibre, length, mural and extraluminal features of luminal strictures. Therefore, WE-MDCT may prove useful as a complementary technique after incomplete or inconclusive colonoscopy to assess features and suspected abnormalities of the surgical anastomosis, particularly when endoscopic or surgical interventions are being planned. This pictorial essay presents the WE-MDCT technique and pitfalls, the expected appearances after different colic surgeries and the imaging features of benign anastomotic disorders (fibrotic stricture, kinking, inflammatory ulcer) and of locally recurrent tumours and CD. TEACHING POINTS • Water-enema multidetector CT (WE-MDCT) effectively visualises the operated colon • Complementary to endoscopy, WE-MDCT may helpfully depict abnormalities of surgical anastomoses • WE-MDCT allows assessment of strictures' features and abnormalities of the upstream bowel • Technical pitfalls, normal postsurgical findings and benign anastomotic disorders are presented • WE-MDCT allows detecting relapsing Crohn's disease, recurrent and metachronous tumours.
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Affiliation(s)
- Massimo Tonolini
- Department of Radiology, "Luigi Sacco" University Hospital, Via G.B. Grassi 74, 20157, Milan, Italy.
| | - Sonia Ippolito
- Department of Radiology, "Luigi Sacco" University Hospital, Via G.B. Grassi 74, 20157, Milan, Italy
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23
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Obaro AE, Burling DN, Plumb AA. Colon cancer screening with CT colonography: logistics, cost-effectiveness, efficiency and progress. Br J Radiol 2018; 91:20180307. [PMID: 29927637 DOI: 10.1259/bjr.20180307] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Colorectal cancer (CRC) incidence and mortality can be significantly reduced by population screening. Several different screening methods are currently in use, and this review focuses specifically on the imaging technique computed tomographic colonography (CTC). The challenges and logistics of CTC screening, as well as the importance of test accuracy, uptake, quality assurance and cost-effectiveness will be discussed. With comparable advanced adenoma detection rates to colonoscopy (the most commonly used whole-colon investigation), CTC is a less-invasive alternative, requiring less laxative, and with the potential benefit that it permits assessment of extra colonic structures. Three large-scale European trials have contributed valuable evidence supporting the use of CTC in population screening, and highlight the importance of selecting appropriate clinical management pathways based on initial CTC findings. Future research into CTC-screening will likely focus on radiologist training and CTC quality assurance, with identification of evidence-based key performance indicators that are associated with clinically-relevant outcomes such as the incidence of post-test interval cancers (CRC occurring after a presumed negative CTC). In comparison to other CRC screening techniques, CTC offers a safe and accurate option that is particularly useful when colonoscopy is contraindicated. Forthcoming cost-effectiveness analyses which evaluate referral thresholds, the impact of extra-colonic findings and real-world uptake will provide useful information regarding the feasibility of future CTC population screening.
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Affiliation(s)
- Anu E Obaro
- 1 Centre for Medical Imaging, University College London , London , UK.,2 St Mark's Academic Institute, St Mark's Hospital , Harrow , UK
| | - David N Burling
- 2 St Mark's Academic Institute, St Mark's Hospital , Harrow , UK
| | - Andrew A Plumb
- 1 Centre for Medical Imaging, University College London , London , UK
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24
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Barton H, Shatti D, Jones CA, Sakthithasan M, Loughborough WW. Review of radiological screening programmes for breast, lung and pancreatic malignancy. Quant Imaging Med Surg 2018; 8:525-534. [PMID: 30050787 DOI: 10.21037/qims.2018.05.06] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The premise of medical screening is to identify clinically occult disease, facilitating intervention at an early stage with the intention of improving prognosis. Identifying solid organ malignancy before nodal or distal metastases have occurred unanimously offers the best chance of successful radical treatment, thus there is clearly a potential significant mortality benefit for successful oncological screening programmes. However, the negative consequences of screening have to be considered, particularly the impact of intervening in asymptomatic populations. Diagnostic radiology has an invaluable ability to non-invasively detect disease and has developed an essential role in several oncological screening programmes with new programmes emerging. These include the established mammography screening programme for breast carcinoma, the emerging CT screening programme for lung carcinoma and a new proposed radiological screening programme for pancreatic carcinoma. Results from published randomized controlled trials analysing the benefits of radiological screening have been convoluted and conflicting. Cancer screening remains a widely contested topic and it is a challenge for both radiologist and clinician to assess the risks and benefits at both a population and individual patient level. In this article, we discuss radiological screening and analyse the current literature on these programmes, with evaluation of recently published studies and ongoing trials.
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Affiliation(s)
- Helena Barton
- Bristol Royal Infirmary, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | | | - Charlotte Anne Jones
- Bristol Royal Infirmary, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| | - Mathuri Sakthithasan
- Bristol Royal Infirmary, University Hospitals Bristol NHS Foundation Trust, Bristol, UK
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25
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Abstract
CT colonography (CTC) has demonstrated equivalent accuracy to optical colonoscopy in the detection of clinically relevant polyps and tumors but this is only possible when technique is optimized. The two most important features of a high-quality CTC are a well-prepared colon and a distended colon. This article will discuss the dietary, bowel preparation, and fecal/fluid tagging options to best prepare the colon. Strategies to optimally distend the colon will also be discussed. CT scan techniques including patient positioning and radiation dose optimization will be reviewed. With proper technique which includes sufficient bowel preparation, fecal/fluid tagging, bowel distension, and optimized scan technique, high-quality CTC examinations should become more feasible, easier to interpret, and more consistently reproducible leading to increased utilization and increased referrals.
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26
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Banerjee AK, Celentano V, Khan J, Longcroft-Wheaton G, Quine A, Bhandari P. Practical gastrointestinal investigation of iron deficiency anaemia. Expert Rev Gastroenterol Hepatol 2018; 12:249-256. [PMID: 29129158 DOI: 10.1080/17474124.2018.1404905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
About 10% of oesophagogastroduodenoscopies (OGDs) and colonoscopies are done for investigation of iron deficiency anemia (IDA) . Much of the existing guidance on investigation of IDA predates CRC screening, which has driven significant improvements in colonoscopy quality and completion rates, as well as a reduction in Helicobacter pylori prevalence and increase in PPI usage, and therefore probably needs re-consideration. New investigations, e.g. CT colonography, enteroscopy and capsule endoscopy have also been introduced. Areas covered: This review updates the approach to practical investigation of IDA. Medline was searched using the terms iron deficiency AND anemia AND/OR gastroscopy, colonoscopy, capsule and enteroscopy, together with review of recent relevant published abstracts on the topic. Expert commentary: Gastrointestinal pathology is now a more common cause of IDA than upper GI causes, reflecting better colonoscopy accuracy and completion rates as well as changing disease patterns, and carcinomas are more likely cause IDA than benign adenomas. Increasing use of antiplatelet and anticoagulants is driving greater presentation of IDA. Capsule endoscopy, enteroscopy and CT colonography are increasingly used. Fecal occult blood testing may be a useful simple screening method in the frail, as a negative test can avoid the need for invasive tests.
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Affiliation(s)
- Anjan K Banerjee
- a Department of Colorectal Surgery , Queen Alexandra Hospital Portsmouth , Portsmouth , UK.,b Care UK North East London Treatment Centre , Ilford , UK
| | - Valerio Celentano
- a Department of Colorectal Surgery , Queen Alexandra Hospital Portsmouth , Portsmouth , UK
| | - Jim Khan
- a Department of Colorectal Surgery , Queen Alexandra Hospital Portsmouth , Portsmouth , UK
| | - Gaius Longcroft-Wheaton
- c Department of Gastroenterology , Queen Alexandra Hospital Portsmouth , Portsmouth , UK.,d University of Portsmouth , Portsmouth , UK
| | - Amanda Quine
- c Department of Gastroenterology , Queen Alexandra Hospital Portsmouth , Portsmouth , UK
| | - Pradeep Bhandari
- c Department of Gastroenterology , Queen Alexandra Hospital Portsmouth , Portsmouth , UK.,d University of Portsmouth , Portsmouth , UK
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27
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Geukes Foppen MH, Rozeman EA, van Wilpe S, Postma C, Snaebjornsson P, van Thienen JV, van Leerdam ME, van den Heuvel M, Blank CU, van Dieren J, Haanen JBAG. Immune checkpoint inhibition-related colitis: symptoms, endoscopic features, histology and response to management. ESMO Open 2018; 3:e000278. [PMID: 29387476 PMCID: PMC5786923 DOI: 10.1136/esmoopen-2017-000278] [Citation(s) in RCA: 175] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 12/15/2022] Open
Abstract
Background Immune checkpoint inhibitors are successfully introduced as anticancer treatment. However, they may induce severe immune-related adverse events (irAEs). One of the most frequent irAEs is diarrhoea. The main objective of this study was to analyse symptoms (ie, grade of diarrhoea), endoscopic and histological features and response to management in immune checkpoint inhibition-related colitis (IRC). Patients and methods We retrospectively analysed patients who developed diarrhoea on checkpoint inhibition and therefore underwent an endoscopy and/or were treated with corticosteroids. Patients were treated between August 2010 and March 2016 for metastatic melanoma or non-small cell lung cancer. Severity of IRC was scored using the endoscopic Mayo score and the van der Heide score. Results Out of a cohort of 781 patients, 92 patients were identified who developed diarrhoea and therefore underwent an endoscopy and/or were treated with corticosteroids. Patients were treated with monotherapy anticytotoxic T-lymphocyte antigen-4, antiprogrammed death receptor-1 or a combination of both. All patients had symptoms of diarrhoea (grade 1: 16%; grade 2: 39% and grade 3: 44%). A complete colonoscopy was performed in 62 (67%) patients, of whom 42 (68%) had a pancolitis (≥3 affected segments). Ulcers were seen in 32% of endoscopies. There was no significant correlation between the grade of diarrhoea at presentation and endoscopic severity scores, the presence of ulcers or histological features. In 54 episodes of diarrhoea (56%), patients received one or more cycles infliximab for steroid-refractory colitis. Patients with higher endoscopic severity scores, ulcers and/or a pancolitis needed infliximab more often. Conclusions The correlation between grade of diarrhoea and endoscopic or histological features for severity of colitis is poor. Patients with higher endoscopic severity scores, ulcers or a pancolitis needed the addition of infliximab more often. Therefore, endoscopy may have value in the evaluation of the severity of IRC and may help in decision making for optimal management.
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Affiliation(s)
- Marnix H Geukes Foppen
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Elisa A Rozeman
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Sandra van Wilpe
- Department of Gastroenterology and Hepatology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Cindy Postma
- Department of Gastroenterology and Hepatology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Petur Snaebjornsson
- Department of Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Johannes V van Thienen
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Monique E van Leerdam
- Department of Gastroenterology and Hepatology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Michel van den Heuvel
- Department of Thoracic Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Christian U Blank
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jolanda van Dieren
- Department of Gastroenterology and Hepatology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - John B A G Haanen
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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Koo S, Neilson LJ, Von Wagner C, Rees CJ. The NHS Bowel Cancer Screening Program: current perspectives on strategies for improvement. Risk Manag Healthc Policy 2017; 10:177-187. [PMID: 29270036 PMCID: PMC5720037 DOI: 10.2147/rmhp.s109116] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer in the UK. The English National Health Service (NHS) Bowel Cancer Screening Program (BCSP) was introduced in 2006 to improve CRC mortality by earlier detection of CRC. It is now offered to patients aged 60-74 years and involves a home-based guaiac fecal occult blood test (gFOBt) biennially, and if positive, patients are offered a colonoscopy. This has been associated with a 15% reduction in mortality. In 2013, an additional arm to BCSP was introduced, Bowelscope. This offers patients aged 55 years a one-off flexible sigmoidoscopy, and if several adenomas are found, the patients are offered a completion colonoscopy. BCSP has been associated with a significant stage shift in CRC diagnosis; however, the uptake of bowel cancer screening remains lower than that for other screening programs. Further work is required to understand the reasons for nonparticipation of patients to ensure optimal uptake. A change of gFOBt kit to the fecal immunochemical tests (FIT) in the English BCSP may further increase patient participation. This, in addition to increased yield of neoplasia and cancers with the FIT kit, is likely to further improve CRC outcomes in the screened population.
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Affiliation(s)
- Sara Koo
- Department of Gastroenterology, South Tyneside District Hospital, South Shields
| | - Laura Jane Neilson
- Department of Gastroenterology, South Tyneside District Hospital, South Shields
| | | | - Colin John Rees
- Department of Gastroenterology, South Tyneside District Hospital, South Shields.,School of Medicine, Pharmacy and Health, Durham University, Stockton on Tees.,Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, UK
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Kothari K, Friedman B, Grimaldi GM, Hines JJ. Nontraumatic large bowel perforation: spectrum of etiologies and CT findings. Abdom Radiol (NY) 2017; 42:2597-2608. [PMID: 28493071 DOI: 10.1007/s00261-017-1180-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Large bowel perforation is an abdominal emergency that results from a wide range of etiologies. Computed tomography is the most reliable modality in detecting the site of large bowel perforation. The diagnosis is made by identifying direct CT findings such as extraluminal gas or contrast and discontinuity along the bowel wall. Indirect CT findings can help support the diagnosis, and include bowel wall thickening, pericolic fat stranding, abnormal bowel wall enhancement, abscess, and a feculent collection adjacent to the bowel. Common etiologies that cause large bowel perforation are colon cancer, foreign body aspiration, stercoral colitis, diverticulitis, ischemia, inflammatory and infectious colitides, and various iatrogenic causes. Recognizing a large bowel perforation on CT can be difficult at times, and there are various entities that may be misinterpreted as a colonic perforation. The purpose of this article is to outline the MDCT technique used for evaluation of suspected colorectal perforation, discuss relevant imaging findings, review common etiologies, and point out potential pitfalls in making the diagnosis of large bowel perforation.
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Affiliation(s)
- Kunal Kothari
- Department of Radiology, Northwell Health System, Hofstra Northwell School of Medicine, Manhasset, NY, USA.
| | - Barak Friedman
- Department of Radiology, Northwell Health System, Hofstra Northwell School of Medicine, Manhasset, NY, USA
| | - Gregory M Grimaldi
- Department of Radiology, Northwell Health System, Hofstra Northwell School of Medicine, Manhasset, NY, USA
| | - John J Hines
- Department of Radiology, Northwell Health System, Hofstra Northwell School of Medicine, Manhasset, NY, USA
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Nagata K, Takabayashi K, Yasuda T, Hirayama M, Endo S, Nozaki R, Shimada T, Kanazawa H, Fujiwara M, Shimizu N, Iwatsuki T, Iwano T, Saito H. Adverse events during CT colonography for screening, diagnosis and preoperative staging of colorectal cancer: a Japanese national survey. Eur Radiol 2017; 27:4970-4978. [PMID: 28674967 DOI: 10.1007/s00330-017-4920-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/27/2017] [Accepted: 05/31/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVES To retrospectively evaluate the frequencies and magnitudes of adverse events associated with computed tomographic colonography (CTC) for screening, diagnosis and preoperative staging of colorectal cancer. METHODS A Japanese national survey on CTC was administered by use of an online survey tool in the form of a questionnaire. The questions covered mortality, colorectal perforation, vasovagal reaction, total number of examinations, and examination procedures. The survey data was collated and raw frequencies were determined. Fisher's exact test was used to determine differences in event rates between groups. RESULTS At 431 institutions, 147,439 CTC examinations were performed. No deaths were reported. Colorectal perforations occurred in 0.014% (21/147,439): 0.003% (1/29,823) in screening, 0.014% (13/91,007) in diagnosis and 0.028% (7/25,330) in preoperative staging. The perforation risk was significantly lower in screening than in preoperative staging CTC procedures (p = 0.028). Eighty-one per cent of perforation cases (17/21) did not require emergency surgery. Vasovagal reaction occurred in 0.081% (120/147,439): 0.111% (33/29,823) in screening, 0.088% (80/91,007) in diagnosis and 0.028% (7/25,330) in preoperative staging. CONCLUSIONS The risk of colorectal perforation and vasovagal reaction in CTC is low. The frequency of colorectal perforation associated with CTC is least in the screening group and greatest in the preoperative-staging group. KEY POINTS • The colorectal perforation rate during preoperative-staging CTC was 0.028 %. • The perforation rates for screening and diagnosis were 0.003 % and 0.014 %, respectively. • The perforation risk is significantly lower in screening than in preoperative staging. • Eighty-one per cent of perforation cases did not require emergency surgery. • Use of an automatic colon insufflator can reduce the risk of bowel perforation.
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Affiliation(s)
- Koichi Nagata
- Committee for Quality Assessment of Colorectal Cancer Screening, Japanese Society of Gastrointestinal Cancer Screening, Tokyo, Japan. .,Gastrointestinal Advanced Imaging Academy, Tochigi, Japan. .,Division of Screening Technology, Centre for Public Health Sciences, National Cancer Centre, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
| | - Ken Takabayashi
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Division of Screening Technology, Centre for Public Health Sciences, National Cancer Centre, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.,Department of Radiology, Hokkaido Gastroenterology Hospital, Honcho 1-jo, 1-chome, Higashi-ku, Sapporo, 065-0041, Japan
| | - Takaaki Yasuda
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Division of Screening Technology, Centre for Public Health Sciences, National Cancer Centre, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.,Department of Radiology, Nagasaki Kamigoto Hospital, 1549-11, Aokatago, Shinkamigoto, Minami-matsuura, Nagasaki, 857-4404, Japan
| | - Michiaki Hirayama
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Department of Gastroenterology, Tonan Hospital, 3-8, Kita 4-jo Nishi 7-chome, Chuo-ku, Sapporo, 060-0004, Japan
| | - Shungo Endo
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Department of Coloproctology, Aizu Medical Centre, Fukushima Medical University, 21-2, Aza, Maeda, Tanisawa, Kawahigashi-machi, Aizu-Wakamatsu, Fukushima, 969-3492, Japan
| | - Ryoichi Nozaki
- Committee for Quality Assessment of Colorectal Cancer Screening, Japanese Society of Gastrointestinal Cancer Screening, Tokyo, Japan.,Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Coloproctology Centre, Takano Hospital, 4-2-88, Obiyama, Chuo-ku, Kumamoto, 862-0924, Japan
| | - Takenobu Shimada
- Committee for Quality Assessment of Colorectal Cancer Screening, Japanese Society of Gastrointestinal Cancer Screening, Tokyo, Japan.,Cancer Detection Centre of the Miyagi Cancer Society, 5-7-30, Kamisugi, Aoba-ku, Sendai, Miyagi, 980-0011, Japan
| | - Hidenori Kanazawa
- Division of Screening Technology, Centre for Public Health Sciences, National Cancer Centre, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.,Department of Radiology, Jichi Medical University, 3311-1, Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan
| | - Masanori Fujiwara
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Radiology Section, Kameda Medical Centre Makuhari, 1-3, Nakase, Mihama-ku, Chiba, 261-8501, Japan
| | - Norihito Shimizu
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Radiology Section, Matsuoka Clinic, 2-9-15, Oji, Oji-cho, Kita-Katsuragi-gun, Nara, 636-0002, Japan
| | - Tatema Iwatsuki
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Radiology Section, Matsuda Hospital, 753 Irinocho, Nishi-ku, Hamamatsu, Shizuoka, 432-8061, Japan
| | - Teruaki Iwano
- Gastrointestinal Advanced Imaging Academy, Tochigi, Japan.,Radiology Section, Tokushima Kensei Hospital, 4-9, Shimosuketo-cho, Tokushima, 770-0805, Japan
| | - Hiroshi Saito
- Committee for Quality Assessment of Colorectal Cancer Screening, Japanese Society of Gastrointestinal Cancer Screening, Tokyo, Japan.,Division of Screening Assessment & Management, Centre for Public Health Sciences, National Cancer Centre, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
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Sali L, Grazzini G, Mascalchi M. CT colonography: role in FOBT-based screening programs for colorectal cancer. Clin J Gastroenterol 2017; 10:312-319. [PMID: 28447326 DOI: 10.1007/s12328-017-0744-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 04/18/2017] [Indexed: 01/28/2023]
Abstract
Computed tomographic colonography (CTC) is a minimally invasive imaging examination for the colon, and is safe, well tolerated and accurate for the detection of colorectal cancer (CRC) and advanced adenoma. While the role of CTC as a primary test for population screening of CRC is under investigation, the fecal occult blood test (FOBT) has been recommended for population screening of CRC in Europe. Subjects with positive FOBT are invited to undergo total colonoscopy, which has some critical issues, such as suboptimal compliance, contraindications and the possibility of an incomplete exploration of the colon. Based on available data, the integration of CTC in FOBT-based population screening programs for CRC may fall into three scenarios. First, CTC is recommended in FOBT-positive subjects when colonoscopy is refused, incomplete or contraindicated. For these indications CTC should replace double-contrast barium enema. Second, conversely, CTC is not currently recommended as a second-level examination prior to colonoscopy in all FOBT-positive subjects, as this strategy is most probably not cost-effective. Finally, CTC may be considered instead of colonoscopy for surveillance after adenoma removal, but specific studies are needed.
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Affiliation(s)
- Lapo Sali
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio", University of Florence, Viale Morgagni 50, 50134, Florence, Italy.
| | - Grazia Grazzini
- Cancer Prevention and Research Institute (ISPO), Via Cosimo il Vecchio 2, 50139, Florence, Italy
| | - Mario Mascalchi
- Department of Biomedical, Experimental and Clinical Sciences "Mario Serio", University of Florence, Viale Morgagni 50, 50134, Florence, Italy
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Silvestre J, Sánchez-Lauro MDM, Callejón MDM, Burgarolas AM, Cruz F, Marchena J. Pneumoperitoneum after CT colonography in a patient with ulcerative colitis. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2016; 107:456-7. [PMID: 26140645 DOI: 10.17235/reed.2015.3520/2014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sali L, Regge D. CT colonography for population screening of colorectal cancer: hints from European trials. Br J Radiol 2016; 89:20160517. [PMID: 27542076 DOI: 10.1259/bjr.20160517] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
CT colonography (CTC) is a minimally invasive radiological investigation of the colon. Robust evidence indicates that CTC is safe, well tolerated and highly accurate for the detection of colorectal cancer (CRC) and large polyps, which are the targets of screening. Randomized controlled trials were carried out in Europe to evaluate CTC as the primary test for population screening of CRC in comparison with faecal immunochemical test (FIT), sigmoidoscopy and colonoscopy. Main outcomes were participation rate and detection rate. Participation rate for screening CTC was in the range of 25-34%, whereas the detection rate of CTC for CRC and advanced adenoma was in the range of 5.1-6.1%. Participation for CTC screening was lower than that for FIT, similar to that for sigmoidoscopy and higher than that for colonoscopy. The detection rate of CTC was higher than that of one FIT round, similar to that of sigmoidoscopy and lower than that of colonoscopy. However, owing to the higher participation rate in CTC screening with respect to colonoscopy screening, the detection rates per invitee of CTC and colonoscopy would be comparable. These results justify consideration of CTC in organized screening programmes for CRC. However, assessment of other factors such as polyp size threshold for colonoscopy referral, management of extracolonic findings and, most importantly, the forthcoming results of cost-effectiveness analyses are crucial to define the role of CTC in primary screening.
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Affiliation(s)
- Lapo Sali
- 1 Department of Biomedical Experimental and Clinical Sciences Mario Serio, University of Florence, Florence, Italy
| | - Daniele Regge
- 2 Dipartimento di Scienze Chirurgiche, Università di Torino, Turin, Italy.,3 Candiolo Cancer Institute FPO, IRCCS, Turin, Italy
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Abstract
Computed tomographic colonography (CTC) is a minimally invasive, patient-friendly, safe and robust colonic imaging modality. The technique is standardized and consolidated evidence from the literature shows that the diagnostic performances for the detection of colorectal cancer and large polyps are similar to colonoscopy (CS) and largely superior to alternative radiological exams, like barium enema. A clear understanding of the exact role of CTC will be beneficial to maximize the benefits and minimize the potential sources of frustration or disappointment for both referring clinicians and patients. Incomplete, failed, or unfeasible CS; investigation of elderly, and frail patients and assessment of diverticular disease are major indications supported by evidence-based data and agreed by the endoscopists. The use of CTC for symptomatic patients, colorectal cancer screening and colonic surveillance is still under debate and, thus, recommended only if CS is unfeasible or refused by patients.
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Affiliation(s)
- Andrea Laghi
- a Department of Radiological Sciences, Oncology and Pathology , Sapienza - University of Rome, ICOT Hospital , Latina , Italy
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35
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Scalise P, Mantarro A, Pancrazi F, Neri E. Computed tomography colonography for the practicing radiologist: A review of current recommendations on methodology and clinical indications. World J Radiol 2016; 8:472-483. [PMID: 27247713 PMCID: PMC4882404 DOI: 10.4329/wjr.v8.i5.472] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 12/23/2015] [Accepted: 02/24/2016] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) represents one of the most relevant causes of morbidity and mortality in Western societies. CRC screening is actually based on faecal occult blood testing, and optical colonoscopy still remains the gold standard screening test for cancer detection. However, computed tomography colonography (CT colonography) constitutes a reliable, minimally-invasive method to rapidly and effectively evaluate the entire colon for clinically relevant lesions. Furthermore, even if the benefits of its employment in CRC mass screening have not fully established yet, CT colonography may represent a reasonable alternative screening test in patients who cannot undergo or refuse colonoscopy. Therefore, the purpose of our review is to illustrate the most updated recommendations on methodology and the current clinical indications of CT colonography, according to the data of the existing relevant literature.
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Abstract
Introduction Computer tomography colonoscopy (CTC) is an increasingly prevalent procedure for the investigation of colorectal symptoms, or as a component of colorectal cancer screening. It is considered a low risk procedure, however colonic perforation is a recognized significant complication. Case Report We report the case of an 81-year-old female patient who underwent CTC after failed optical colonoscopy as part of routine colorectal cancer screening. Perforation of the rectum with surrounding pararectal air was confirmed on CTC. The patient had minimal symptoms and was treated successful non-operatively with bowel rest and antibiotics. Conclusion Perforation sustained during CTC is an uncommon complication. The incidence of perforation during CTC is still lower than that during optical colonoscopy. In the absence of significant abdominal signs and symptoms, this rare complication may be successfully managed non-operatively.
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Affiliation(s)
| | - Yasser Arafat
- Department of Surgery, Caboolture Hospital, Caboolture, Australia
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Zakeri N, Pollok RCG. Diagnostic imaging and radiation exposure in inflammatory bowel disease. World J Gastroenterol 2016; 22:2165-2178. [PMID: 26900282 PMCID: PMC4734994 DOI: 10.3748/wjg.v22.i7.2165] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 11/02/2015] [Accepted: 12/14/2015] [Indexed: 02/06/2023] Open
Abstract
Diagnostic imaging plays a key role in the diagnosis and management of inflammatory bowel disease (IBD). However due to the relapsing nature of IBD, there is growing concern that IBD patients may be exposed to potentially harmful cumulative levels of ionising radiation in their lifetime, increasing malignant potential in a population already at risk. In this review we explore the proportion of IBD patients exposed to high cumulative radiation doses, the risk factors associated with higher radiation exposures, and we compare conventional diagnostic imaging with newer radiation-free imaging techniques used in the evaluation of patients with IBD. While computed tomography (CT) performs well as an imaging modality for IBD, the effective radiation dose is considerably higher than other abdominal imaging modalities. It is increasingly recognised that CT imaging remains responsible for the majority of diagnostic medical radiation to which IBD patients are exposed. Magnetic resonance imaging (MRI) and small intestine contrast enhanced ultrasonography (SICUS) have now emerged as suitable radiation-free alternatives to CT imaging, with comparable diagnostic accuracy. The routine use of MRI and SICUS for the clinical evaluation of patients with known or suspected small bowel Crohn’s disease is to be encouraged wherever possible. More provision is needed for out-of-hours radiation-free imaging modalities to reduce the need for CT.
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Sali L, Mascalchi M, Falchini M, Ventura L, Carozzi F, Castiglione G, Delsanto S, Mallardi B, Mantellini P, Milani S, Zappa M, Grazzini G. Reduced and Full-Preparation CT Colonography, Fecal Immunochemical Test, and Colonoscopy for Population Screening of Colorectal Cancer: A Randomized Trial. J Natl Cancer Inst 2016; 108:djv319. [PMID: 26719225 DOI: 10.1093/jnci/djv319] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 10/05/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Population screening for colorectal cancer (CRC) is widely adopted, but the preferred strategy is still under debate. We aimed to compare reduced (r-CTC) and full cathartic preparation CT colonography (f-CTC), fecal immunochemical test (FIT), and optical colonoscopy (OC) as primary screening tests for CRC. METHODS Citizens of a district of Florence, Italy, age 54 to 65 years, were allocated (8:2.5:2.5:1) with simple randomization to be invited by mail to one of four screening interventions: 1) biennial FIT for three rounds, 2) r-CTC, 3) f-CTC, 4) OC. Patients tested positive to FIT or CTC (at least one polyp ≥6mm) were referred to OC work-up. The primary outcomes were participation rate and detection rate (DR) for cancer or advanced adenoma (advanced neoplasia). All statistical tests were two-sided. RESULTS Sixteen thousand eighty-seven randomly assigned subjects were invited to the assigned screening test. Participation rates were 50.4% (4677/9288) for first-round FIT, 28.1% (674/2395) for r-CTC, 25.2% (612/2430) for f-CTC, and 14.8% (153/1036) for OC. All differences between groups were statistically significant (P = .047 for r-CTC vs f-CTC; P < .001 for all others). DRs for advanced neoplasia were 1.7% (79/4677) for first-round FIT, 5.5% (37/674) for r-CTC, 4.9% (30/612) for f-CTC, and 7.2% (11/153) for OC. Differences in DR between CTC groups and FIT were statistically significant (P < .001), but not between r-CTC and f-CTC (P = .65). CONCLUSIONS Reduced preparation increases participation in CTC. Lower attendance and higher DR of CTC as compared with FIT are key factors for the optimization of its role in population screening of CRC.
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Affiliation(s)
- Lapo Sali
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD).
| | - Mario Mascalchi
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Massimo Falchini
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Leonardo Ventura
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Francesca Carozzi
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Guido Castiglione
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Silvia Delsanto
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Beatrice Mallardi
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Paola Mantellini
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Stefano Milani
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Marco Zappa
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
| | - Grazia Grazzini
- Department of Biomedical, Experimental and Clinical Sciences 'Mario Serio', University of Florence, Florence, Italy (LS, MM, MF, SM); Cancer Prevention and Research Institute (ISPO), Florence, Italy (LV, FC, GC, BM, PM, MZ, GG); im3D S.p.A., Turin, Italy (SD)
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Lara LF, Avalos D, Huynh H, Jimenez-Cantisano B, Padron M, Pimentel R, Erim T, Schneider A, Ukleja A, Parlade A, Castro F. The safety of same-day CT colonography following incomplete colonoscopy with polypectomy. United European Gastroenterol J 2015; 3:358-63. [PMID: 26279844 DOI: 10.1177/2050640615577881] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 02/24/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Concerns about the risk of bowel perforation for same-day computed tomography colonography (CTC) following an incomplete colonoscopy with polypectomy may lead to unnecessarily postponing the CTC. OBJECTIVE The objective of this article is to describe the complications including colon perforations associated with same-day CTC in a cohort who had polypectomies but an incomplete colonoscopy. DESIGN We conducted a retrospective study. SETTING Our study took place in a single, tertiary referral center. PATIENTS We studied consecutive patients who had CTC the same day as an incomplete colonoscopy with polypectomy. INTERVENTIONS Interventions included optical colonoscopy (OC), endoscopic polypectomies, and same-day CTC. MAIN OUTCOME MEASUREMENTS Our main outcome measurements included perforation rate with long-term follow-up. RESULTS A total of 3% of patients undergoing colonoscopy from January 2008 to December 2012 had same-day CTC following incomplete OC, and 72 polypectomies were performed in 34 (or 17%) of these patients. Incomplete colonoscopies were due to colon tortuosity and looping (25), severe angulations (five), colon mass (two), colon stenosis (one), bradycardia (one). Fifty-three percent of the OCs were screening for colon neoplasia, 29% diagnostic and 18% were surveillance of colon polyps. Most polyps were ≤ 5 mm, and found in the left colon. There were no reported complications or perforations associated with same-day CTCs during short- and long-term follow-up. LIMITATIONS Limitations of our analysis included retrospective single-center design, small number of patients for the occurrence, referral to same-day CTC was not standardized, inability to establish safety of CTC for specific scenarios such as after complex polypectomies, strictures, or advanced IBD. CONCLUSIONS Radiologists' apprehension to perform a CTC the same day as an incomplete colonoscopy following polypectomies because of perceived risk of perforation may be unfounded. More data are needed to determine the safety of same-day CTC in patients with high-risk findings during colonoscopy such as a stricture, severe IBD, and after complex polypectomies.
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Patel JD, Chang KJ. The role of virtual colonoscopy in colorectal screening. Clin Imaging 2015; 40:315-20. [PMID: 26298421 DOI: 10.1016/j.clinimag.2015.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 07/06/2015] [Indexed: 02/07/2023]
Abstract
Colorectal cancer is the second leading cause of cancer-related deaths in the United States. The earlier colorectal cancer is detected, the better chance a person has of surviving 5 years after being diagnosed, emphasizing the need for effective and regular colorectal screening. Computed tomographic colonography has repeatedly demonstrated sensitivities equivalent to the current gold standard, optical colonoscopy, in the detection of clinically relevant polyps. It is an accurate, safe, affordable, available, reproducible, quick, and cost-effective option for colorectal screening and should be considered for mass screening.
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Affiliation(s)
- Jay D Patel
- Department of Diagnostic Imaging, The Warren Alpert Medical School of Brown University/Rhode Island Hospital, 593 Eddy St., Providence, RI 02903.
| | - Kevin J Chang
- Director of CT Colonography, Division of Body Imaging, Department of Diagnostic Imaging, The Warren Alpert Medical School of Brown University/Rhode Island Hospital, 593 Eddy St., Providence, RI 02908.
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Clinical indications for computed tomographic colonography: European Society of Gastrointestinal Endoscopy (ESGE) and European Society of Gastrointestinal and Abdominal Radiology (ESGAR) Guideline. Eur Radiol 2015; 25:331-45. [PMID: 25278245 PMCID: PMC4291518 DOI: 10.1007/s00330-014-3435-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Laghi A, Bellini D, Petrozza V, Piccazzo R, Santoro GA, Fabbri C, van der Paardt MP, Stoker J. Imaging of colorectal polyps and early rectal cancer. Colorectal Dis 2015; 17 Suppl 1:36-43. [PMID: 25511860 DOI: 10.1111/codi.12820] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- A Laghi
- Department of Radiological Sciences, Oncology and Pathology, "SAPIENZA" University of Rome, I.C.O.T. Hospital, Latina, Italy
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Laghi A. Computed tomography colonography in 2014: an update on technique and indications. World J Gastroenterol 2014; 20:16858-67. [PMID: 25492999 PMCID: PMC4258555 DOI: 10.3748/wjg.v20.i45.16858] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/27/2014] [Accepted: 10/14/2014] [Indexed: 02/06/2023] Open
Abstract
Twenty years after its introduction, computed tomographic colonography (CTC) has reached its maturity, and it can reasonably be considered the best radiological diagnostic test for imaging colorectal cancer (CRC) and polyps. This examination technique is less invasive than colonoscopy (CS), easy to perform, and standardized. Reduced bowel preparation and colonic distention using carbon dioxide favor patient compliance. Widespread implementation of a new image reconstruction algorithm has minimized radiation exposure, and the use of dedicated software with enhanced views has enabled easier image interpretation. Integration in the routine workflow of a computer-aided detection algorithm reduces perceptual errors, particularly for small polyps. Consolidated evidence from the literature shows that the diagnostic performances for the detection of CRC and large polyps in symptomatic and asymptomatic individuals are similar to CS and are largely superior to barium enema, the latter of which should be strongly discouraged. Favorable data regarding CTC performance open the possibility for many different indications, some of which are already supported by evidence-based data: incomplete, failed, or unfeasible CS; symptomatic, elderly, and frail patients; and investigation of diverticular disease. Other indications are still being debated and, thus, are recommended only if CS is unfeasible: the use of CTC in CRC screening and in surveillance after surgery for CRC or polypectomy. In order for CTC to be used appropriately, contraindications such as acute abdominal conditions (diverticulitis or the acute phase of inflammatory bowel diseases) and surveillance in patients with a long-standing history of ulcerative colitis or Crohn's disease and in those with hereditary colonic syndromes should not be overlooked. This will maximize the benefits of the technique and minimize potential sources of frustration or disappointment for both referring clinicians and patients.
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