Squamous cell carcinoma of unknown origin in middle mediastinum.
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.
Morita
Y
Y
Department of Internal Medicine, Sapporo Medical College, Japan.
Yamagishi
M
M
Shijubo
N
N
Nakata
H
H
Kurihara
M
M
Asakawa
M
M
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*