Nasal Cavity and Paranasal Sinus Lethal Midline Granuloma

**Semantic type:** Neoplastic Process

**Definition:** An aggressive, progressive, and destructive lesion affecting the nasal cavities, paranasal sinuses, and the palate. The vast majority of cases are malignant lymphoproliferations affecting the midline of the face in patients with nasal type extranodal NK/T-cell lymphoma.

**Synonyms:** - Lethal midline granuloma - Midfacial Necrotising Lesion - Midline Lethal Granuloma of Nasal Cavity and Paranasal Sinus - Midline Lethal Granuloma of the Nasal Cavity and Paranasal Sinus