Grade III Lymphomatoid Granulomatosis

**Semantic type:** Neoplastic Process

**Definition:** Lymphomatoid granulomatosis characterized by the presence of aggregates of neoplastic large B-lymphocytes, usually admixed with pleomorphic and Hodgkin-like cells, in a background of chronic inflammation. Necrotic changes are present and are usually extensive. Grade III lymphomatoid granulomatosis should be approached clinically as a subtype of diffuse large B-cell lymphoma.

**Synonyms:** - Angiocentric Immunoproliferative Lesion Grade III - Grade III Angiocentric Immunoproliferative Lesion - Grade III Angiocentric Immunoproliferative Lesions - Grade III LYG