Extraabdominal Fibromatosis

**Semantic type:** Neoplastic Process

**Definition:** An insidious poorly circumscribed neoplasm arising from the soft tissues outside the abdomen. It is characterized by the presence of elongated spindle-shaped fibroblasts, vascular collagenous stroma formation, and an infiltrative growth pattern.

**Synonyms:** - Extra-abdominal desmoid - Extraabdominal Desmoid - Extraabdominal Desmoid Tumor