Dolin等曾将浆细胞瘤分为四类:1、多发性骨髓瘤或骨髓瘤病,2、骨孤立性骨髓瘤,3、浆细胞性白血病,4、髓外浆细胞瘤。其中髓外浆细胞瘤系指原发于骨髓以外软组织者。此瘤较少见。国内曾有鼻腔浆细胞瘤的记载。多见于头颈部,其中2/3病例原发于鼻、鼻窦及鼻咽部。此瘤虽多属良性,但术后可复发,少数可发生转移及恶变,故也有视为临界性肿瘤。可以单发或多发,男 Dolin et al. previously classified plasmacytomas into four categories: 1. multiple myeloma or myeloma, 2. bone isolated myeloma, 3. plasma cell leukemia, and 4. extramedullary plasmacytoma. The extramedullary plasma cell tumor refers to the primary soft tissue in the bone marrow. This tumor is rare. Domestic nasal plasmacytoma has been described in China. More common in the head and neck, of which 2/3 of the cases originated in the nose, sinuses and nasopharynx. Although this tumor is mostly benign, it can relapse after surgery, and a small number can occur metastasis and malignant transformation, it is also considered critical tumor. Can be single or multiple, male