Colorectal Undifferentiated Carcinoma

**Semantic type:** Neoplastic Process

**Definition:** An invasive malignant epithelial tumor that arises from the colon or rectum. There is no morphologic, immunophenotypic, or molecular biological evidence of glandular or squamous differentiation.

**Synonyms:** - Undifferentiated Colorectal (Colon or Rectal) Cancer