title: Coexisting undifferentiated thymic carcinoma and thymic carcinoid tumor.
abstract: Thymic carcinoma is an unusual neoplasm, and the undifferentiated type is rare. Thymic carcinoid is also rare. This report describes a patient with coexisting undifferentiated thymic carcinoma and a carcinoid tumor. Both lesions were completely excised. The carcinoid cells showed argyrophilic granules by Grimelius' method and immunoreactivity against neuron-specific enolase, whereas the undifferentiated carcinoma cells were negative for argyrophilic stain and immunostaining against neuron-specific enolase.
authors.affiliation: Department of Surgery II, National Defense Medical College, Tokorozawa, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sensaki
authors.forename: S
authors.initials: S
authors.lastname: Aida
authors.forename: K
authors.initials: K
authors.lastname: Takagi
authors.forename: H
authors.initials: H
authors.lastname: Shibata
authors.forename: T
authors.initials: T
authors.lastname: Ogata
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: S
authors.initials: S
authors.lastname: Tamai
mesh_terms: D002276:Carcinoid Tumor / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary; D013945:Thymoma / Q000473:pathology*; D013953:Thymus Neoplasms / Q000473:pathology*