(1) destruction of the nasal septum, hard palate, lateral nasal walls, paranasal sinuses, skin of the face, orbit and nasopharynx by an inflammatory infiltrate with atypical lymphocytic and histiocytic cells; a form of lymphoma in most cases. (2) obsolete term for polymorphic reticulosis. SYN: granuloma gangrenescens, malignant granuloma, midline malignant reticulosis granuloma.