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Verloop CA, Goos JAC, Bruno MJ, Quispel R, van Driel LMJW, Hol L. Diagnostic yield of endoscopic and EUS-guided biopsy techniques in subepithelial lesions of the upper GI tract: a systematic review. Gastrointest Endosc 2024; 99:895-911.e13. [PMID: 38360118 DOI: 10.1016/j.gie.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 01/22/2024] [Accepted: 02/06/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND AND AIMS Obtaining adequate tissue samples in subepithelial lesions (SELs) remains challenging. Several biopsy techniques are available, but a systematic review including all available techniques to obtain a histologic diagnosis of SEL is lacking. The aim of this study was to evaluate the diagnostic yield and adverse event rates of endoscopic biopsies, EUS-guided FNA (EUS-FNA), EUS-guided fine-needle biopsy (FNB) (EUS-FNB), and mucosal incision-assisted biopsy (MIAB) for SELs in the upper GI tract. METHODS A search strategy in multiple databases was performed. The primary outcome was diagnostic yield, defined as the percentage of procedures in which histology was obtained and resulted in a definitive histopathologic diagnosis. Secondary outcome measures included reported procedure-related adverse events, which were graded according to the AGREE (Adverse Events in Gastrointestinal Endoscopy) classification. RESULTS A total of 94 original articles were included. Studies were classified per endoscopic technique to obtain histopathology. This resulted in 8 included studies for endoscopic biopsy methods, 55 studies for EUS-FNA, 33 studies for EUS-FNB, and 26 studies for MIAB. Pooled rates for diagnostic yield were 40.6% (95% confidence interval [CI], 30.8-51.2) for endoscopic biopsy, 74.6% (95% CI, 69.9-78.7) for EUS-FNA, 84.2% (95% CI, 80.7-87.2) for EUS-FNB, and 88.2% (95% CI, 84.7-91.1) for MIAB. Reported procedure-related adverse events graded AGREE II or higher were 2.8% to 3.9% for endoscopic biopsies, 1.0% to 4.5% for EUS-FNA, .9% to 7.7% for EUS-FNB, and 1.9% to 7.9% for MIAB. CONCLUSIONS Based on the available evidence, MIAB and EUS-FNB seem to be most effective in terms of achieving a high diagnostic yield, with similar rates of adverse events.
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Affiliation(s)
- Cynthia A Verloop
- Department of Gastroenterology, Maasstad Hospital, Rotterdam, the Netherlands.
| | - Jacqueline A C Goos
- Department of Internal Medicine, Erasmus University Medical Centre, Rotterdam the Netherlands
| | - Marco J Bruno
- Department of Gastroenterology, Erasmus University Medical Centre, Rotterdam the Netherlands
| | - Rutger Quispel
- Department of Gastroenterology, Reinier de Graaf hospital, Delft, the Netherlands
| | - Lydi M J W van Driel
- Department of Gastroenterology, Erasmus University Medical Centre, Rotterdam the Netherlands
| | - Lieke Hol
- Department of Gastroenterology, Maasstad Hospital, Rotterdam, the Netherlands
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Pohekar M, Rampurwala J, Sabireen, Shinde RS. Gastric Schwannoma-Two Unusual Cases with Usual Presentation and Review of Literature. Indian J Surg Oncol 2024; 15:117-120. [PMID: 38511014 PMCID: PMC10948721 DOI: 10.1007/s13193-023-01847-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/11/2023] [Indexed: 03/22/2024] Open
Abstract
Schwannomas, also known as neurilemmomas, are characteristically benign, slow growing neoplasms originating from Schwann cell sheath. Gastrointestinal schwannomas are very rare with stomach being the most affected organ representing approximately 0.2% of all gastric tumours. Malignant transformation is rarely reported in these tumors and complete surgical resection with negative margins is the recommended treatment. Herein, we report our experience of 2 cases of gastric submucosal spindle cell tumour (SMT), which were preoperatively assumed to be as gastrointestinal stromal tumor (GIST), however postoperatively confirmed as schwannoma on immunohistochemical examination.
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Affiliation(s)
- Monika Pohekar
- Department of Surgical Oncology, Bombay Hospital Institute of Medical Sciences, Marine Lines, Mumbai, 400020 India
| | - Jakiyuddin Rampurwala
- Department of Surgical Oncology, Bombay Hospital Institute of Medical Sciences, Marine Lines, Mumbai, 400020 India
| | - Sabireen
- Department of Surgical Oncology, Bombay Hospital Institute of Medical Sciences, Marine Lines, Mumbai, 400020 India
| | - Rajesh S Shinde
- Department of Surgical Oncology, Bombay Hospital Institute of Medical Sciences, Marine Lines, Mumbai, 400020 India
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Fan X, Jiao J, Luo L, Zhu L, Zheng Z, Chen X, Wang T, Liu W, Wang B. Role of endoscopic ultrasound and endoscopic resection in the diagnosis and treatment of esophageal granular cell tumors. Scand J Gastroenterol 2022; 57:1264-1271. [PMID: 35576559 DOI: 10.1080/00365521.2022.2067784] [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
BACKGROUND AND AIM Diagnosis and complete resection of esophageal granular cell tumors (GCTs) is an area of concern. However, articles on endoscopic ultrasound (EUS) and endoscopic resection of esophageal granular cell tumors are few. To evaluate the role of endoscopic ultrasound and endoscopic resection in the diagnosis and treatment of esophageal granular cell tumors. METHODS A retrospective analysis of 15 patients with esophageal granular cell tumors who underwent endoscopic ultrasound examination and endoscopic resection in our hospital was conducted. The clinical data, endoscopic ultrasound images, endoscopic treatment, pathological characteristics, postoperative complications and follow-up status of all patients were evaluated. Ten board-certified endoscopists independently evaluated the white light endoscopic images of the 15 patients (Test 1) and the endoscopic ultrasound images together with white light endoscopic images of the same patient set (Test 2). RESULT Female patients accounted for 53.4% of the participants. The average age at the time of diagnosis was 49.13 ± 9.31 years old. Ten lesions (66.67%) showed hypoechoic signal, four lesions (26.67%) showed hyperechoic signal and one lesion showed medium signal. The diagnostic accuracy was significantly higher with Test 2(65.3% vs. 92.0%, p < .001). Complete endoscopic resection was performed in all the patients. No complications occurred in any of the patients. No esophageal stenosis, recurrence, or metastases was found in all patients during the follow-up period. CONCLUSION The endoscopic ultrasound images of esophageal granular cell tumors have certain characteristics that help diagnose esophageal granular cell tumors. Endoscopic resection of esophageal granular cell tumors is an effective, safe and feasible treatment method.
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Affiliation(s)
- Xiaofei Fan
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Jiao Jiao
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Lili Luo
- Department of Geriatric, General Hospital, Tianjin Medical University, Tianjin, China
| | - Lanping Zhu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Zhongqing Zheng
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Xin Chen
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Tao Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Wentian Liu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Bangmao Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin, China.,Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
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Ashat M, Klair JS, Rooney SL, Vishal SJ, Jensen C, Sahar N, Murali AR, El-Abiad R, Gerke H. Randomized controlled trial comparing the Franseen needle with the Fork-tip needle for EUS-guided fine-needle biopsy. Gastrointest Endosc 2021; 93:140-150.e2. [PMID: 32526235 DOI: 10.1016/j.gie.2020.05.057] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/25/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS EUS-guided FNA primarily provides cytologic samples. EUS-guided fine-needle biopsy (FNB) with needles that provide histologic specimens may enhance diagnostic yield and facilitate accessory tissue staining. Several different needle designs are currently available and design superiority is unknown. We designed a randomized controlled trial to compare 2 commonly used EUS-FNB needles in their ability to provide histologic tissue samples (primary endpoint) and to reach an accurate diagnosis (secondary endpoint). METHODS A total of 150 lesions from 134 patients (November 2018 to June 2019) were randomized 1:1 between biopsy with a Franseen needle and a Fork-tip needle. The groups were compared regarding the quality of the tissue samples and diagnostic accuracy. RESULTS Of 150 lesions, 75 were pancreatic and 75 were other solid lesions in and around the GI tract. There was no statistically significant difference between the Franseen needle and the Fork-tip needle in the yield of adequate histologic samples, 71 of 75 (94.7%) versus 72 of 75 (96%), (P = 1.00), an absolute difference of -1.3% (95% confidence interval [CI], -8.1% to 5.4%). The 2 groups were similar in the diagnostic accuracy of histologic analysis, 64 of 75 (85.3%) versus 68 of 75 (90.7%) (P = .45), absolute difference -5.4% (95% CI, -15.7% to 5%); and in the diagnostic accuracy of combined cytologic and histologic analysis, 65 of 75 (86.7%) versus 69 of 75 (92%) (P = .43), absolute difference -5.3% (95% CI, -15.2% to 4.5%). CONCLUSIONS There was no significant difference in the performance of the Franseen needle versus the Fork-tip needle. Both needles achieved a high yield of histologic tissue samples and high diagnostic accuracy. (Clinical trial registration number: NCT03672032.).
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Affiliation(s)
- Munish Ashat
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Jagpal S Klair
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Sydney L Rooney
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Sagar J Vishal
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Chris Jensen
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Nadav Sahar
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Arvind R Murali
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Rami El-Abiad
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Henning Gerke
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
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Ashat M, Soota K, Klair JS, Gupta S, Jensen C, Murali AR, Jesudoss R, El-Abiad R, Gerke H. Modified Endoscopic Ultrasound Needle to Obtain Histological Core Tissue Samples: A Retrospective Analysis. Clin Endosc 2020; 53:471-479. [PMID: 32019294 PMCID: PMC7403022 DOI: 10.5946/ce.2019.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 08/26/2019] [Indexed: 02/06/2023] Open
Abstract
Background/Aims Endoscopic ultrasound (EUS)-guided fine-needle aspiration is very effective for providing specimens for cytological evaluation. However, the ability to provide sufficient tissue for histological evaluation has been challenging due to the technical limitations of dedicated core biopsy needles. Recently, a modified EUS needle has been introduced to obtain tissue core samples for histological analysis. We aimed to determine (1) its ability to obtain specimens for histological assessment and (2) the diagnostic accuracy of EUS-guided fine-needle biopsy (EUS-FNB) using this needle.
Methods We retrospectively analyzed consecutive cases of FNB using modified EUS needles for 342 lesions in 303 patients. The cytology and histological specimens were analyzed. Diagnostic accuracy was calculated.
Results Adequate cytological and histological assessment was possible in 293/342 (86%) and 264/342 (77%) lesions, respectively. Diagnostic accuracy of the cytological specimen was 294/342 (86%) versus 254/342 (74%) for the histological specimen (p<0.01). Diagnostic accuracy of the combined cytological and histological assessment was 323/342 (94.4%), which was significantly higher than that of both histology alone (p<0.001) and cytology alone (p=0.001).
Conclusions EUS-FNB with the modified EUS needle provided histologic tissue cores in the majority of cases and achieved excellent diagnostic accuracy with few needle passes.
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Affiliation(s)
- Munish Ashat
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Kaartik Soota
- Department of Gastroenterology and Hepatology, the University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jagpal S Klair
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA, USA
| | - Sarika Gupta
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Chris Jensen
- Department of Pathology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Arvind R Murali
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Randhir Jesudoss
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Rami El-Abiad
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Henning Gerke
- Department of Gastroenterology and Hepatology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
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Chen W, Cai G. Endoscopic ultrasound-guided fine-needle aspiration biopsy of gastric schwannoma: Cytomorphologic features and diagnostic pitfalls. Diagn Cytopathol 2019; 47:1218-1222. [PMID: 31343112 DOI: 10.1002/dc.24289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 07/11/2019] [Accepted: 07/15/2019] [Indexed: 11/09/2022]
Abstract
Schwannoma rarely occurs in the stomach. We present a case of gastric schwannoma, which was initially evaluated by endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) biopsy and confirmed by surgical resection. The patient was a 57-years-old woman with history of dyspepsia, who was found to have a large submucosal mass in the stomach. EUS-FNA showed scant spindle cells with abundant lymphocytes. The spindle cells were immunoreactive with S100, while negative for CD117, desmin, and CD34. The lymphocytes were mixed B-cells and T-cells. Immunostaining, flow cytometry, and molecular testing showed no evidence of B-cell lymphoma. The diagnosis of gastric schwannoma was confirmed by histopathological evaluation of the resected tumor. Gastric schwannoma has unique features of mixed spindle cells and lymphocytes. The tumor should be differentiated from other gastric mesenchymal tumors, and lymphoproliferative disorder is a pitfall.
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Affiliation(s)
- Wanwan Chen
- Department of Pathology, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Guoping Cai
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut
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Lopes CV, Rigon P, Zettler CG, Hartmann AA. Differential diagnosis of mesenchymal neoplasms of the digestive tract by cell block and immunohistochemistry. Cytopathology 2018; 29:531-536. [DOI: 10.1111/cyt.12630] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/26/2018] [Indexed: 12/11/2022]
Affiliation(s)
- César Vivian Lopes
- Department of Gastroenterology and Digestive Endoscopy; Santa Casa Hospital; Porto Alegre Brazil
| | - Péttala Rigon
- Department of Pathology; Santa Casa Hospital; Porto Alegre Brazil
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Wang Y, Chen JJ, Wang XF, Wang Q. Clinical and prognostic significance of Raf kinase inhibitory protein expression in gastrointestinal stromal tumors. World J Gastroenterol 2018; 24:2508-2517. [PMID: 29930472 PMCID: PMC6010945 DOI: 10.3748/wjg.v24.i23.2508] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/05/2018] [Accepted: 04/26/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To detect the expression of Raf kinase inhibitory protein (RKIP) in gastrointestinal stromal tumors (GISTs) and to analyze its relationship with clinicopatholgical characteristics and prognosis of this disease.
METHODS Sixty-three patients with pathologically diagnosed GISTs who underwent surgical resection at the Shengjing Hospital of China Medical University from January 2011 to January 2015 and had complete clinical, pathological, and follow-up data were included. Immunohistochemical method was used to detect the expression of RKIP in GIST tissue samples from these patients. Kaplan-Meier method was used to calculate the survival rate of 60 patients with complete follow-up data, and Cox regression analysis was performed to identify factors affecting the prognosis of patients GISTs to evaluate further the diagnostic and prognostic value of RKIP in GISTs.
RESULTS In GIST tissues, RKIP positive signals, manifesting as brownish yellow or brown granules, were located in the cytoplasm or on the membrane. Of 63 tissue samples included in this study, 34 (54%) were positive and 29 (46%) were negative for RKIP expression. Statistical analysis showed that RKIP expression in GISTs was significantly associated with tumor size, National Institutes of Health (NIH) risk grade, and mucosal invasion, but had no significant association with age, gender, tumor location, or the number of mitotic figures. Univariate Kaplan-Meier analysis revealed that the 1-, 3-, and 5-year survival rates were 94.4%, 89.2%, and 80.5% for patients with positive RKIP expression, and 88.6%, 68.2%, and 48.2% for patients with negative RKIP expression, suggesting that patients with high RKIP expression had significantly higher survival rates than those with low expression (Log-rank test, P = 0.0015). Cox regression analysis demonstrated that NIH risk grade was significantly associated with the prognosis of GISTs (P = 0.037), suggesting that NIH risk grade is a significant predictor of the prognosis of GISTs. RKIP expression had a tendency to predict the survival of GISTs (P = 0.122), suggesting that RKIP expression may have appreciated value to predict the prognosis of GISTs.
CONCLUSION This study demonstrated that: (1) RKIP expression in GISTs is associated with tumor size, NIH risk grade, and mucosal invasion, and low or no expression of RKIP predicts a high malignancy potential; (2) high RKIP correlates positively with the survival of patients with GISTs; and (3) RKIP expression has appreciated value for predicting the survival of patients with GISTs, although it is not an independent prognostic factor in GISTs.
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Affiliation(s)
- Yang Wang
- Department of Gastrointestinal Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Juan-Juan Chen
- Department of Gastrointestinal Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Xiao-Fei Wang
- Department of Gastrointestinal Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
| | - Qiang Wang
- Department of Gastrointestinal Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning Province, China
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Kawahara W, Ewaz A, Chang KHF, Sakamoto R, Putorak R, Namiki TS, Tauchi-Nishi PS. Efficacy of endoscopic ultrasound-guided fine-needle aspiration and core needle biopsy in the diagnosis of upper gastrointestinal submucosal lesions. J Am Soc Cytopathol 2017; 6:254-264. [PMID: 31043296 DOI: 10.1016/j.jasc.2017.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 06/09/2023]
Abstract
INTRODUCTION Endoscopic ultrasonographically guided fine-needle aspiration (EUS-FNA) has been increasingly utilized to evaluate submucosal lesions of the upper gastrointestinal (UGI) tract. Our study aims to determine the efficacy of UGI EUS-FNA/core needle biopsy (CNB), including the frequency and cytomorphologic features of encountered submucosal lesions, and to investigate contributing factors including the role of rapid on-site evaluation (ROSE). METHODS We analyzed all UGI submucosal lesions diagnosed at our institution by EUS-FNA/CNB from September 2008 through August 2015. RESULTS During this 8-year study period, 94 patients underwent 110 UGI EUS-FNA/CNB, including 89 (81%) gastric, 11 (10%) duodenal, and 10 (9%) esophageal lesions. Twenty-seven (25%) were gastrointestinal stromal tumors (GISTs), followed by 13 (12%) leiomyomas, 5 (5%) schwannomas, 4 (4%) gastric adenocarcinomas, 3 (3%) neuroendocrine tumors (NETs), and 3 (3%) pancreatic heterotopias. All GISTs, leiomyomas, and NETs were ultimately diagnosed by EUS biopsies, as well as 75% of adenocarcinomas, 60% of schwannomas, and 33% of pancreatic heterotopias. The specificity of EUS-FNA/CNB for these 6 most commonly encountered lesions was 100%, with sensitivity of 82%. Sensitivity was 100% for esophageal and duodenal biopsies, and 80% and 75% for gastric and gastroesophageal procedures, respectively. Factors that contributed to poor yield included the lack of ROSE, small lesional size, lesion location and histology, and needle type. Neither number of needle passes nor operator experience appeared to influence specimen adequacy. CONCLUSION EUS-FNA/CNB is an effective modality for diagnosing UGI submucosal lesions. Awareness of potential errors due to sampling of the bowel wall, lesional cystic degeneration, as well as pancreatic heterotopia and Brunner gland hamartoma is essential in order to avoid false diagnoses.
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Affiliation(s)
- William Kawahara
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii
| | - Abdulwahab Ewaz
- Department of Pathology, University of Hawaii, c/o The Queen's Medical Center, University of Hawaii Tower, Honolulu, Hawaii
| | - Karen H F Chang
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii
| | - Reid Sakamoto
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii
| | - Renn Putorak
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii
| | - Thomas S Namiki
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii; Department of Pathology, University of Hawaii, c/o The Queen's Medical Center, University of Hawaii Tower, Honolulu, Hawaii
| | - Pamela S Tauchi-Nishi
- Department of Pathology, The Queen's Medical Center, Honolulu, Hawaii; Department of Pathology, University of Hawaii, c/o The Queen's Medical Center, University of Hawaii Tower, Honolulu, Hawaii.
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