Angiocentric Immunoproliferative Lesion

**Semantic type:** Neoplastic Process

**Definition:** A neoplastic lymphoproliferative process characterized by an angiocentric arrangement of tumor cells and associated angiodestruction. It includes lymphomatoid granulomatosis which is a lymphoproliferative lesion derived from mature B-lymphocytes and cases of extranodal NK/T-cell lymphomas of nasal type.

**Synonyms:** - AIL - Angiocentric immunoproliferative lesion