TY - JOUR AU - Kim, Kwan-Chang AU - Vo, Hong-Phuc PY - 2016 TI - Localized malignant pleural sarcomatoid mesothelioma misdiagnosed as benign localized fibrous tumor JF - Journal of Thoracic Disease; Vol 8, No 6 (June 01, 2016): Journal of Thoracic Disease Y2 - 2016 KW - N2 - Localized malignant pleural mesothelioma (LMPM) is a rare tumor with good prognosis by surgical resection. We report an atypical case of malignant pleural sarcomatoid mesothelioma (SM) in an asymptomatic 65-year-old woman, who had no history of exposure to asbestos. She presented with a small pleural mass without pleural effusion and was misdiagnosed as a benign localized fibrous tumor (BLFT) on pathologic examination through a surgical tumor specimen. However, seven months later, the patient returned with serious cancerous symptoms. A large recurrent tumor mass was found within the chest wall invading at the old surgical resection site. SM, a subtype of LMPM, was confirmed with histopathogy and immunohistochemisty. In conclusion, malignant pleural mesothelioma (MPM) can present with typical radiologic finding similar to a BLFT, and has a wide histopathologic presentation in biopsy specimen. A thorough pathologic investigation should be attempted even when a pleural mass resembles benign, localized, and small on radiologic studies. UR - https://jtd.amegroups.org/article/view/7355