Inflammatory Atypical Lipomatous Tumor/Well Differentiated Liposarcoma

**Semantic type:** Neoplastic Process

**Definition:** A rare morphologic variant of atypical lipomatous tumor/well differentiated liposarcoma occurring most often in the retroperitoneum. It is characterized by the presence of a predominant chronic inflammatory infiltrate.

**Synonyms:** - Inflammatory ALT/WDLPS - Inflammatory Atypical Lipomatous Tumor/Well-Differentiated Liposarcoma - Inflammatory Liposarcoma - Inflammatory liposarcoma