[Rectal cancer (a differential electron microscopic diagnosis)].
A tumor of the rectum in a woman of 74 is described. The analysis of the tumor in light microscope suggested a low-differentiated cancer or melanoma. Electron microscopic examination of the tumor metastasis into a lymph node showed most of the tumor cells to have low differentiation and contain no ultrastructural organspecific markers. However, in the tumor cells comprising a small group, typical tonofibrils and desmosomes were found which substantiated the diagnosis of squamous cell carcinoma.
D000368:Aged; D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000648:ultrastructure; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008854:Microscopy, Electron; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000648:ultrastructure
Rak priamoĭ kishki (élektronno-mikroskopicheskaia differentsial'naia diagnostika).