男 50岁 前额包块2个月 大体:灰白色结节状组织一块3*3 

 弥漫性神经纤维瘤

神经纤维瘤

神经纤维瘤 

神经纤维瘤

神经纤维瘤

典型的神经纤维瘤，非弥漫性神经纤维瘤

Focal cutaneous neurofibroma may be infiltrative but always confined wthin the dermis.;however,diffuse cutaneous neurofibroma usually involved subcutaneous tissue， infiltrating into fat with adnexa traped. solitary tumor suggests  the patient does not have neurofibromatosis type 1.Thus,the clinical and histopathological features of this case may be suggestive of a diagnosis of diffuse cutaneous neurofibroma,if the tumor was imcompletely excised,there may be a focally rucurrence anytime later.