悪性腫瘍との鑑別を要した肺クリプトコッカス症の1例

Pulmonary Cryptcoccosis Mimicking Malignant Tumor；Report of a Case

はじめに　肺クリプトコッカス症は，肺野に単発結節影を呈することがあり，肺悪性腫瘍との鑑別が問題となる．われわれは，膵癌術後の胸部CTでスリガラス状陰影の出現を認め，急速な画像変化とPET検査陽性のため転移性肺腫瘍や原発性肺癌との鑑別を要した肺クリプトコッカス症を経験したので，若干の文献的考察を加えて報告する．

Pulmonary cryptococcosis is difficult to distinguish from lung cancer clinically, and is often diagnosed by surgery. A 72-year-old woman, who underwent distal pancreatectomy and splenectomy for pancreatic carcinoma. Four months after surgery, a tumor shadow was detected in the left lung as a ground-glass nodule（GGN）of 12 mm in diameter, which was found to change to 15 mm with increased density by the computed tomography（CT）scan after 2 months. The nodule showed positive accumulation of fluorodeoxyglucose（FDG）by positron emission tomography（PET）, and was suspected of malignant tumor. She underwent a partial resection of the left lung under thoracoscopy.