Kidney Fibrosarcoma

**Semantic type:** Neoplastic Process

**Definition:** A usually aggressive malignant neoplasm arising from the kidney. It is characterized by the presence of spindle-shaped fibroblasts and collagenous stroma formation in a herringbone growth pattern.

**Synonyms:** - Fibrosarcoma of Kidney - Fibrosarcoma of the Kidney - Renal Fibrosarcoma