Poliosis in a scalp nodule. Congenital intradermal nevus with poliosis

Poliosis circumscripta associated with neurofibroma

A 32-year-old woman presented at our clinic with a moderately soft, nontender, subcutaneous mass in the left temporal region and white hairs overlying the swelling. The lesion was surgically excised, and there was no recurrence at one year postoperatively. On histological examination, the hair follicles overlying the subcutaneous mass were devoid of pigment and a poorly demarcated fibrocellular process was seen in the subcutaneous mass, which was typical of neurofibroma. To our knowledge, only one case of poliosis associated with neurofibroma has been previously reported.

Heterochromia of the scalp hair: a result of pigmentary mosaicism?

Five patients who presented stable bands of hair of a different color with respect to the surrounding hair are reported. In 4 patients this was an isolated finding. One patient also had diffuse linear skin hypopigmentation and other abnormalities. We hypothesize that these 5 cases represent a distinct type of hair heterochromia, possibly because of somatic mosaicism for genes affecting pigmentation.