Grade I Lymphomatoid Granulomatosis

**Semantic type:** Neoplastic Process

**Definition:** Lymphomatoid granulomatosis characterized by the presence of a polymorphous lymphoid infiltrate without cytologic atypia. Large lymphocytes are absent or rare. By in situ hybridization, EBV-positive cells are infrequently seen.

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