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Article in Japanese
Abstract
Case Report
A pulmonary inflammatory myofibroblastic tumor: Case report
Yu Katsumataa Koji Sakaguchia Takashi Kagoshimab Yoshitaka Yamazakib Tetsuro Ichikawac Hirotoshi Horiod
aDepartment of Thoracic Surgery, Nagano Prefectural Suzaka Hospital
bDepartment of Respiratory Internal Medicine, Nagano Prefectural Suzaka Hospital
cDepartment of Pathology, Nagano Prefectural Suzaka Hospital
dDepartment of Thoracic Surgery, Tokyo Metropolitan Komagome Hospital
ABSTRACT
A 74-year-old woman was admitted to our hospital because of abnormal shadow on a chest X-ray. Chest CT revealed a 30-mm tumor in the left lingular segment, and PET/CT indicated abnormal FDG accumulation (SUVmax: 10.37) in this nodule. The tumor could not be diagnosed via bronchoscopic examination. A video-assisted thoracic surgery was performed for definitive diagnosis and treatment. The tumor presented an extrapulmonary, smooth surface and a mushroomed-shaped tumor. A partial lung resection was performed, and a frozen section revealed the proliferation of stromal tissue with no malignant cells. Ultimately, the tumor was diagnosed as an inflammatory myofibroblastic tumor from the results of anaplastic lymphoma kinase (ALK) positive and other immunochemical examinations. Pulmonary inflammatory myofibroblastic tumors (PIMTs) are rare and difficult to distinguish from malignant tumors.
KEYWORDS
Pulmonary inflammatory myofibroblastic tumor IMT Lung cancer Malignant tumor Differential diagnosis
Received 15 Mar 2013 ／ Accepted 17 May 2013
AJRS, 2(5): 646-650, 2013
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