The spontaneous regression of @entity5 is an extremely rare event. Here we report a case of extranodal @entity706 occurring in the @entity1464 , which regressed spontaneously. A 78-year-old female had noticed a diffuse bucco-lingual swelling of the left maxillary gingiva in the incisor regions for a month, and she visited our department on 20 January 1999. Intraoral examination revealed @entity4 in the maxillary gingiva of the incisor regions. Cervical and underarm lymphadenopathy was not detected. Surgical biopsy of the swollen gingiva revealed a @entity706 , with diffuse large cells, B cell type. She was clinically staged as IE. After biopsy, the @entity5 spontaneously decreased in size; finally, the mass completely disappeared after 3 weeks. After regression, the lesions were externally irradiated with 30 Gy total dose. The @entity1 has been free from disease for 36 months after regression.

Spontaneous regression of extranodal XXXX occurred in the gingiva.

@entity1 :: ('9606', 'Species') :: ['patient'] @entity1464 :: ('MESH:D005889', 'Disease') :: ['upper gingiva'] @entity706 :: ('MESH:D008223', 'Disease') :: ['malignant lymphoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'malignant neoplasm'] @entity4 :: ('MESH:D004487', 'Disease') :: ['diffuse swelling and redness']
@entity706 :: (MESH:D008223,Disease) :: ['malignant lymphoma']
