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Tuberc Respir Dis (Seoul). 2013 Aug;75(2):67-70. doi: 10.4046/trd.2013.75.2.67. Epub 2013 Aug 30.

Minute pulmonary meningothelial-like nodules simulating hematogenous lung metastasis: a case report.

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1
Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.

Abstract

A 52-year-old man was referred to our clinic for an 11.3 mm nodule in the left lower lobe that was discovered on a chest computed tomography (CT) scan. Eleven small nodules were subsequently found in both lungs. Initially, we performed a transthoracic needle aspiration using CT scan guidance. The pathologic report showed a few clusters of atypical cells that were suspicious for malignancy. The positron emission tomography images revealed multiple lung nodules scattered throughout both lungs. The largest nodule (11.3 mm) in the left lower lobe did not have any discernible fludeoxyglucose uptake. For pathologic confirmation, we consulted a thoracic surgeon to perform the video-assisted thoracoscopic surgery. The final diagnosis was minute pulmonary meningothelial-like nodules (MPMNs). MPMNs are benign in nature, and only a few cases require treatment. However, when clinicians are suspicious of potential malignancy, a pathological correlation is essential, even if the final diagnosis is MPMNs.

KEYWORDS:

Immunohistochemistry; Lung Neoplasms; Neoplasm Metastasis

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