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Pan B, Wang Y, Zhu Z, Zhu X. Diagnostic Performance of 18 F-FDG Positron Emission Tomography/Computed Tomography and Blood Test Parameters for Pulmonary Inflammatory Pseudotumor. J Thorac Imaging 2024; 39:298-303. [PMID: 38639385 DOI: 10.1097/rti.0000000000000780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
PURPOSE Pulmonary inflammatory pseudotumor (PIP) is an inflammatory proliferative tumor-like lesion that frequently exhibits hypermetabolism on 18 F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography imaging (PET/CT) and is readily misdiagnosed as a malignant tumor. The purpose of this study was to identify PIP by combining PET/computed tomography metabolic and blood test characteristics with machine learning. PATIENTS AND METHODS We recruited 27 patients with PIP and 28 patients with lung cancer (LC). The PET metabolic and blood test parameters were collected, and the differences between the groups were evaluated. In addition, we combined the support vector machine (SVM) classifier with the indicators that differed between the groups to classify PIP and LC. RESULTS For PET metabolic parameters, our findings showed that, as compared with the LC group, maximal standardized uptake value ( P < 0.001, t = -4.780), Mean standardized uptake value SUV mean , P < 0.001, t = -4.946), and SD40% ( P < 0.001, t = -4.893) were considerably reduced in the PIP group, whereas CV40% ( P = 0.004, t = 3.012) was significantly greater. For blood test parameters, the total white blood cell count ( P < 0.001, t = 6.457) and absolute neutrophil count ( P < 0.001, t = 6.992) were substantially higher in the PIP group than in the LC group. Furthermore, the performance of SVM trained solely on PET metabolic parameters (mean area under the curve [AUC] = 0.84) was comparable to that of SVM trained solely on blood test parameters (mean AUC = 0.86). Surprisingly, utilizing the combined parameters increased SVM performance significantly (mean AUC = 0.98). CONCLUSION PET metabolic and blood test parameters differed significantly between the PIP and LC groups, and the SVM paradigm using these significantly different features has the potential to be used to classify PIP and LC, which has important clinical implications.
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Affiliation(s)
- Bo Pan
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC
| | - Yanming Wang
- Center for Biomedical Imaging, University of Science and Technology of China, Hefei, China
| | - Zehua Zhu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC
| | - Xingxing Zhu
- Department of Nuclear Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC
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2
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Chen HC, Fu Q, Song Y, Wang DL. Clinical and pathological characteristics of patients with pulmonary inflammatory pseudotumors: An 18-year retrospective study of 31 cases. Medicine (Baltimore) 2021; 100:e27040. [PMID: 34477134 PMCID: PMC8415998 DOI: 10.1097/md.0000000000027040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 08/02/2021] [Indexed: 01/05/2023] Open
Abstract
To investigate the clinical and pathological characteristics in patients with pulmonary inflammatory pseudotumors (PIP).This retrospective study included 31 patients with PIP from 2001 to 2019. Preoperative computed tomography scan was performed in all patients. Clinical and pathological characteristics were collected and analyzed.Thirty-one patients (16 female and 15 male) were recruited, with a median age of 57 years (range, 11-72 years). Eight (25.8%) patients were asymptomatic, and the others had symptoms characterized by cough with sputum, chest and back pain, dry cough, fever and blood in sputum, or hemoptysis. All cases were single lesions, including 23 cases in the right lung, and 8 cases in the left lung. Computed tomography scan demonstrated irregular lobulated nodules or masses in 14 patients, and regular round or oval nodules or masses in 11 cases. The blurred edge of tumors and spiculation was found in 12 cases. Microscopic results were characterized by the collection of inflammatory mesenchymal cells. Immunohistochemical examination showed vimentin, smooth muscle actin, and anaplastic lymphoma kinase positive. Complete tumor resection was obtained in all cases. No recurrence or metastasis was observed during the follow-up period.PIP has a variety of manifestations. Preoperative diagnosis is difficult to reach. The final diagnosis still depends on the pathological and immunohistochemical examination. Complete surgical resection is the main treatment at present, and the overall prognosis is good.
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Affiliation(s)
- Heng-Chi Chen
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Qiang Fu
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yan Song
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Da-Li Wang
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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3
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Munagala R, Chiruvella V, Pucar D, Keshavamurthy J. Cocaine-induced pulmonary complications: A diagnosis of waiting and watching. Lung India 2021; 38:362-364. [PMID: 34259176 PMCID: PMC8272414 DOI: 10.4103/lungindia.lungindia_164_21] [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] [Indexed: 11/06/2022] Open
Abstract
Pulmonary complications of cocaine among users are common. Manifestations include lung congestion, intra-alveolar edema, and diffuse alveolar hemorrhage (DAH). Direct cellular toxicity, eosinophilia, barotrauma, and vasoactive effects of cocaine are believed to induce DAH. We present a rare case of cocaine-associated focal alveolar hemorrhage mimicking malignancy on imaging. Initially contemplated biopsy was avoided based on rapid growth of concerning lung lesion, with subsequent near resolution on follow-up. This case illustrates the importance of epidemiologic and temporal multimodality correlation when evaluating indeterminate lung lesions.
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Affiliation(s)
- Rohit Munagala
- Department of Radiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Varsha Chiruvella
- Department of Radiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
| | - Darko Pucar
- Department of Radiology, Yale School of Medicine, New Haven, CT, USA
| | - Jayanth Keshavamurthy
- Department of Radiology, Medical College of Georgia at Augusta University, Augusta, GA, USA
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4
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Nigam N, Hashim Z, Neyaz Z, Gupta M, Nath A. Inflammatory pseudotumor of the lung with complete resolution. Lung India 2021; 38:90-91. [PMID: 33402647 PMCID: PMC8066923 DOI: 10.4103/lungindia.lungindia_71_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Neha Nigam
- Department of Pathology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Zia Hashim
- Department of Pulmonary Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Zafar Neyaz
- Department of Radiodiagnosis, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Mansi Gupta
- Department of Pulmonary Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
| | - Alok Nath
- Department of Pulmonary Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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5
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Moran CA, Suster S. Reprint of: Unusual non-neoplastic lesions of the lung. Semin Diagn Pathol 2018; 35:339-346. [PMID: 30249369 DOI: 10.1053/j.semdp.2018.09.003] [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: 11/11/2022]
Abstract
Many nonneoplastic conditions that may affect the lung are in reality rare or unusual manifestations of metabolic processes, inflammatory conditions, or unknown etiology. Because of their rarity, they can often be confused with malignant neoplasms. Familiarity with these conditions not only will expedite further treatment for these patients but also will avoid the process of more tests or unnecessary surgical procedures. The nomenclature for some of those conditions is still controversial. The clinical outcome of these conditions can be quite variable, with some patients surviving a long number of years and others eventually succumbing to the disease. We will limit our discussion in this review to four of these conditions, including inflammatory pseudotumor (inflammatory myofibroblastic tumor), placental transmogrification of lung, alveolar microlithiasis, and metastatic calcification. Although these lesions are not part of the gamut of neoplastic conditions affecting the lung, they are nonetheless important to recognize, as their outcome may not necessarily be an innocuous one.
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Affiliation(s)
- Cesar A Moran
- Department of Pathology, M.D. Anderson Cancer Center, Houston, Texas.
| | - Saul Suster
- Department of Pathology, Medical College of Wisconsin, Milwaukee, Wisconsin
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6
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Degheili JA, Kanj NA, Koubaissi SA, Nasser MJ. Indolent lung opacity: Ten years follow-up of pulmonary inflammatory pseudo-tumor. World J Clin Cases 2017; 5:61-66. [PMID: 28255550 PMCID: PMC5314263 DOI: 10.12998/wjcc.v5.i2.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 11/30/2016] [Accepted: 12/14/2016] [Indexed: 02/05/2023] Open
Abstract
Inflammatory pseudotumor (IPT) has always been considered a diagnostic challenge. Its rarity and resemblance to other more common pathological entities imposes that neither clinical nor radiological characteristics can lead to a definitive diagnosis. The surgical excision of the lesion is the ultimate approach for accurate diagnosis and cure. Moreover the true nature of IPT, its origin as a neoplastic entity or an over-reactive inflammatory reaction to an unknown trigger, has been a long debated matter. Surgery remains the treatment of choice. IPT is mostly an indolent disease with minimal morbidity and mortality. Local invasion and metastasis predict a poor prognosis. We hereby present a unique case of pulmonary IPT that was surgically excised, but recurred contralaterally, shortly thereafter. Despite no medical or surgical treatment for ten years, the lesion has remained stable in size, with neither symptoms nor extra-pulmonary manifestations.
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7
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ZHANG TIAN, YUAN YAWEI, REN CHEN, DU SHASHA, CHEN JIARONG, SUN QUANQUAN, LIU ZHENGJUN. Recurrent inflammatory myofibroblastic tumor of the inguinal region: A case report and review of the literature. Oncol Lett 2015; 10:675-680. [PMID: 26622552 PMCID: PMC4509014 DOI: 10.3892/ol.2015.3297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 04/24/2015] [Indexed: 12/17/2022] Open
Abstract
Inflammatory myofibroblastic tumors (IMTs) of the inguinal region are exceptionally rare. The current study reported the case of a 49 year-old male patient with IMT, who presented with a fever, night sweats, anorexia, loss of weight and frequent urination. Computed tomography (CT) revealed a lesion occupying the soft tissue of the right inguinal region and surgery was performed to resect the lesion. Histopathological analysis of the lesion revealed a composition of spindle and inflammatory cells, including plasma cells and lymphocytes. In addition, immunohistochemical analysis demonstrated that the tumor cells were positive for CD34, vimentin, actin, Ki-67, B cell lymphoma-2, CD99, epithelial membrane antigen and CD38; however, tumor cells were negative for CD117, desmin, anaplastic lymphoma kinase and creatine kinase. Thus, the patient was diagnosed with IMT and was advised to return for regular follow-up appointments. Subsequently, the patient developed a local recurrence 12 months following the initial surgery. Of note, the histopathological characteristics of the recurrent lesions were consistent with those of the initial specimen. Thus, a second surgery was performed, followed by fractionated radiotherapy (FRT). At 3 and 6 months following the FRT, magnetic resonance imaging scans did not indicate tumor recurrence or metastasis. In conclusion, surgical excision is the current recommended treatment for IMT; however, for cases similar to that of the current study, which are not successfully controlled by surgical excision, radiotherapy should be considered and long-term follow-up is essential.
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Affiliation(s)
- TIAN ZHANG
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
- Department of Radiology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, P.R. China
| | - YAWEI YUAN
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - CHEN REN
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - SHASHA DU
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - JIARONG CHEN
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - QUANQUAN SUN
- Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - ZHENGJUN LIU
- Department of Vascular Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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Michaelides SA, Passalidou E, Bablekos GD, Aza E, Goulas G, Chorti M, Nicolaou IN, Lioulias AG. Cavitating lung lesion as a manifestation of inflammatory tumor (pseudotumor) of the lung: A case report and literature review. AMERICAN JOURNAL OF CASE REPORTS 2014; 15:258-65. [PMID: 24971159 PMCID: PMC4070991 DOI: 10.12659/ajcr.890466] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 02/28/2014] [Indexed: 11/23/2022]
Abstract
Patient: Female, 60 Final Diagnosis: Inflammatory pseudotumor of the lung Symptoms: Cough dry • fever Medication: — Clinical Procedure: — Specialty: —
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Affiliation(s)
- Stylianos A Michaelides
- Department of First Thoracic Medicine, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
| | - Elisabeth Passalidou
- Department of First Thoracic Medicine, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
| | - George D Bablekos
- Technological Institute of Education (T.E.I) of Athens, Athens, Greece
| | - Evlambia Aza
- Department of First Thoracic Medicine, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
| | - George Goulas
- Department of First Thoracic Medicine, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
| | - Maria Chorti
- Department of Histopathologic, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
| | - Irene N Nicolaou
- Department of Histopathologic, "Agioi Anargyroi" General and Oncologic Hospital, Kifissia, Athens, Greece
| | - Achilleas G Lioulias
- Department of Thoracic Surgical, "Sismanogleion" General Hospital, Maroussi, Attiki, Athens, Greece
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9
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Demirhan O, Ozkara S, Yaman M, Kaynak K. A rare benign tumor of the lung: Inflammatory myofibroblastic tumor - Case report. Respir Med Case Rep 2013; 8:32-5. [PMID: 26029612 PMCID: PMC3920374 DOI: 10.1016/j.rmcr.2013.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 12/24/2012] [Accepted: 01/07/2013] [Indexed: 11/18/2022] Open
Abstract
A fifty year old lady who was operated for thyroid cancer two years ago and completed adjuvant therapy, underwent a computer tomography (CT) of the chest during her follow up. The CT showed a mass lesion in the right lung, located to the lateral segment of the middle lobe. There were no intrabronchial lesions on bronchoscopy. Positron emission CT (PET CT) showed a dense hypermetabolic mass located in the right middle lobe lateral segment and having malignant characteristics. A videothorascopic wedge resection was performed and the specimen was sent for frozen section, which showed no evidence of malignancy. Pathology report revealed an inflammatory myofibroblastic tumor (IMT). Since IMT is a rare benign tumor of the lung, we herein report this patient along with a discussion of the relevant literature.
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Affiliation(s)
- Ozkan Demirhan
- Istanbul Bilim University, Medical Faculty, Department of Thoracic Surgery, Istanbul
- Corresponding author. Mehmetcik cad, Cahit Yalcın Sok, No: 1, Mecidiyekoy, Istanbul. Tel.: +90 532 348 31 03; fax: +90 212 212 88 11.
| | - Selvinaz Ozkara
- Haydarpasa Numune Hospital, Department of Pathology, Istanbul
| | - Mustafa Yaman
- Istanbul University, Cerrahpasa Faculty of Medicine, Department of Pulmonary Medicine, Istanbul
| | - Kamil Kaynak
- Istanbul University, Cerrahpasa Faculty of Medicine, Department of Thoracic Surgery, Istanbul
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10
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Spontaneous regression of lung lesions after excision of the submandibular gland in a patient with chronic sclerosing sialadenitis. Auris Nasus Larynx 2012; 39:212-5. [DOI: 10.1016/j.anl.2011.01.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 01/19/2011] [Accepted: 01/21/2011] [Indexed: 11/18/2022]
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11
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Goto T, Akanabe K, Maeshima A, Kato R. Surgery for recurrent inflammatory pseudotumor of the lung. World J Surg Oncol 2011; 9:133. [PMID: 22004917 PMCID: PMC3215646 DOI: 10.1186/1477-7819-9-133] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 10/18/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cases of recurrent inflammatory pseudotumor have only rarely been reported. The treatment for recurrent pseudotumor is surgery. Patients not eligible for surgery require different treatment, and the optimal type of the treatment is controversial. CASE PRESENTATION A 54-year-old woman was noted to have an abnormal shadow in the right middle lung field on chest X-ray. Computed tomography of the chest revealed an infiltrative lesion in the right segment 4 and a nodule in the right segment 8. She underwent right middle lobectomy and partial resection of the right segment 8. Histopathology revealed non-atypical lymphocytes and plasma cells infiltrates, leading to the diagnosis of the lymphoplasmacytic type of inflammatory pseudotumor. During postoperative follow-up, chest computed tomography revealed a nodular lesion in the left segment 3 and an infiltrative lesion in the right segment 2. Left segment 3 segmentectomy and right segment 2 wedge resection were performed. The histopathological findings were similar to those of the first surgical specimen, leading to the diagnosis of recurrent lymphoplasmacytic type of inflammatory pseudotumor. CONCLUSION Surgical cases of recurrent inflammatory pseudotumor of the lung have been reported only very rarely. We believe that surgery is the best treatment for recurrent inflammatory pseudotumor of the lung when patients are eligible.
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Affiliation(s)
- Taichiro Goto
- Department of General Thoracic Surgery, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.
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12
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KAARTEENAHO RIITTA, SORMUNEN RAIJA, PÄÄKKÖ PAAVO. Variable expression of tenascin-C, osteopontin and fibronectin in inflammatory myofibroblastic tumour of the lung. APMIS 2010; 118:91-100. [DOI: 10.1111/j.1600-0463.2009.02566.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Inflammatory Myofibroblastic Tumor Presenting as a Large Mass and a Spontaneously Resolving Nodule in the Lung. J Bronchology Interv Pulmonol 2009; 16:286-9. [DOI: 10.1097/lbr.0b013e3181bdbad9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Quaia E, Baratella E, Pizzolato R, Bussani R, Cova MA. Radiological-pathological correlation in intratumoural tissue components of solid lung tumours. Radiol Med 2008; 114:173-89. [PMID: 19082781 DOI: 10.1007/s11547-008-0354-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Accepted: 02/11/2008] [Indexed: 01/15/2023]
Abstract
The aim of this paper is to describe the intratumoural tissue components of solid lung tumours evidenced by macroscopic and/or microscopic examination of the autopsy or surgical specimen and visible on computed tomography (CT) without and with contrast material administration. Seven intratumoural tissue components can be identified both at CT and at pathology: (1) solid component, (2) haemorrhagic component, (3) coagulation necrosis, (4) liquefaction necrosis, (5) parenchymal consolidation, (6) diffuse peripheral component and (7) fibrotic component. Necrotic and haemorrhagic components are typically observed in malignant lesions, whereas solid and fibrotic components may be seen both in solid lung malignancies and in benign lesions.
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Affiliation(s)
- E Quaia
- Unità Clinica Operativa di Radiologia, Ospedale di Cattinara, Università di Trieste, Strada di Fiume 447, 34149, Trieste, Italy.
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15
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Nomura S, Ishii K, Shimizu M, Inami N, Urase F, Maeda Y. Inflammatory pseudotumor following cord blood transplantation for adult T-cell leukemia. Bone Marrow Transplant 2008; 42:493-4. [DOI: 10.1038/bmt.2008.191] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Abstract
Many nonneoplastic conditions that may affect the lung are in reality rare or unusual manifestations of metabolic processes, inflammatory conditions, or unknown etiology. Because of their rarity, they can often be confused with malignant neoplasms. Familiarity with these conditions not only will expedite further treatment for these patients but also will avoid the process of more tests or unnecessary surgical procedures. The nomenclature for some of those conditions is still controversial. The clinical outcome of these conditions can be quite variable, with some patients surviving a long number of years and others eventually succumbing to the disease. We will limit our discussion in this review to four of these conditions, including inflammatory pseudotumor (inflammatory myofibroblastic tumor), placental transmogrification of lung, alveolar microlithiasis, and metastatic calcification. Although these lesions are not part of the gamut of neoplastic conditions affecting the lung, they are nonetheless important to recognize, as their outcome may not necessarily be an innocuous one.
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Affiliation(s)
- Cesar A Moran
- Department of Pathology, M.D. Anderson Cancer Center, Houston, Texas 77030, USA.
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17
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Sakurai H. Inflammatory pseudotumor of the lung: a pathological controversy. Int J Clin Oncol 2007; 12:309. [PMID: 17701014 DOI: 10.1007/s10147-007-0660-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Accepted: 01/18/2007] [Indexed: 11/29/2022]
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18
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Abstract
Inflammatory myofibroblastic tumor (IMT) is a mesenchymal neoplasm composed of transformed myofibroblastic spindle cells with infiltration of a large number of inflammatory cells and/or lymphocytes. The etiology of IMT remains unknown. IMT occurs at various sites and often affects young adults and children. IMT of the liver mostly arises in the right lobe of liver. Biopsy, computed tomography (CT) and magnetic resonance imaging (MRI) are beneficial to diagnosis and differential diagnosis. Vimentin, smooth muscle actin (SMA), muscle-specific actin (MSA) are often positive by immunohistochemistry. The prognosis of most patients is favorable after surgery. In this article, we reviewed the overseas and domestic literatures and summarized the advancement of research on the IMT of the liver about etiology, pathogenesis, clinical presentations, imaging feature, histological appearance, immunohistochemical and electron microscopic feature, diagnosis, differential diagnosis and therapy.
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