title: [A case report of pulmonary actinomycosis presenting as a mass shadow on chest X-ray].
abstract: A 58-year-old man admitted to hospital because of hemoptysis. Chest X-ray showed a large mass in the right middle lobe. A tumor marker CYFRA was slightly elevated. Despite a detailed examination after admission, no definite diagnosis was made. Lung cancer was suspected and a middle lobectomy was performed. Histopathological specimen of resected lung showed typical "sulfur granule" of actinomycosis. Pulmonary actinomycosis should be included in the differential diagnosis of a pulmonary mass lesion.
authors.affiliation: Department of Surgery, National Sanatorium Higashi Nagoya Hospital, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Kamiya
authors.forename: T
authors.initials: T
authors.lastname: Umeda
authors.forename: T
authors.initials: T
authors.lastname: Kako
mesh_terms: D000196:Actinomycosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D003937:Diagnosis, Differential; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D013902:Radiography, Thoracic