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Search: Organ site Search: Tumor / Syndrome
WHO Classification of Tumours
Medullary carcinoma, NOS
Small intestine


A malignant epithelial tumour in which the cells form solid sheets and have abundant eosinophilic cytoplasm and large, vesicular nuclei with prominent nucleoli. An intraepithelial infiltrate of lymphocytes is characteristic.

Typical sites of involvemet include carcinomas of the thyroid gland, breast, colon, rectum, and small intestine.