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J Thorac Dis. 2016 Jun;8(6):E379-84. doi: 10.21037/jtd.2016.03.92.

Localized malignant pleural sarcomatoid mesothelioma misdiagnosed as benign localized fibrous tumor.

Journal of thoracic disease

Kwan-Chang Kim, Hong-Phuc Vo

Affiliations

  1. 1 Department of Thoracic and Caridiovascular Surgery, School of Medicine, Ewha Womans University, Seoul, Korea ; 2 Department of Surgery, Windsor University, School of Medicine, St. Kitts Nevis, USA.

PMID: 27293862 PMCID: PMC4885954 DOI: 10.21037/jtd.2016.03.92

Abstract

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.

Keywords: Pleura; computed tomography (CT); lobectomy; mesothelioma; pathology

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