Inflammatory Myofibroblastic Tumor

**Semantic type:** Neoplastic Process

**Definition:** A multinodular intermediate fibroblastic neoplasm that arises from soft tissue or viscera, in children and young adults. It is characterized by the presence of spindle-shaped fibroblasts and myofibroblasts, and a chronic inflammatory infiltrate composed of eosinophils, lymphocytes, and plasma cells.

**Synonyms:** - IMT - Inflammatory Fibrosarcoma - Inflammatory Myofibroblastic Neoplasm - Inflammatory Pseudotumor - Inflammatory myofibroblastic tumor