[Case of lung cancer with difficulty in diagnosing its primary lesion, presenting muscle metastasis as a chief complaint].
D000231:Adenocarcinoma, Papillary / Q000473:pathology*; D006801:Humans; D008168:Lung / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009379:Neoplasms, Muscle Tissue / Q000473:pathology*