骨纤维异常增殖症 (简称骨纤 )是较为常见的骨病 ,但单发于鼻腔及鼻咽腔等处的骨纤鲜见报道。本文报告 2例分别发生于鼻腔、鼻咽腔的骨纤 ,其中 1例因发病部位少见且病灶表现不典型而致误诊。1　病例报告例 1　患者　男 ,15岁 ,维吾尔族 ,因“左鼻腔渐进性肿大伴鼻塞 3年”入院 Bone fibrous dysplasia (referred to as bone fiber) is a more common bone disease, but single hair in the nasal cavity and nasopharyngeal cavity fiber rarely seen. Two cases of nasal and nasopharyngeal fibrosis were reported in this paper. One case was misdiagnosed due to the rare site of the disease and the atypical lesions. 1 case report 1 patient male, 15 years old, Uygur, due to “left nasal enlargement with nasal congestion for 3 years” admission