title: Squamous cell carcinoma of unknown origin in middle mediastinum.
abstract: We report a rare case of squamous cell carcinoma located in the middle mediastinum as a solitary mass. Histologically, lymphatic tissues remained together with nests of squamous cell carcinoma which were occupying the greater part of the mass. Examinations of the whole body failed to detect a primary site of the squamous cell carcinoma. It is considered that the carcinoma cells reflect metastasis from a primary-unknown carcinoma (most likely TO lung squamous cell carcinoma) or that they originated from benign epithelial inclusions in a mediastinal lymph node.
authors: Department of Internal Medicine, Sapporo Medical College, Japan.
authors: Y
authors: Y
authors: Morita
authors: M
authors: M
authors: Yamagishi
authors: N
authors: N
authors: Shijubo
authors: H
authors: H
authors: Nakata
authors: M
authors: M
authors: Kurihara
authors: M
authors: M
authors: Asakawa
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology / Q000556:secondary*; D006801:Humans; D008168:Lung / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology; D008297:Male; D008479:Mediastinal Neoplasms / Q000473:pathology / Q000556:secondary*; D008482:Mediastinum / Q000473:pathology; D008875:Middle Aged; D009382:Neoplasms, Unknown Primary / Q000473:pathology*