REPORT OF A CASE
A 3-month-old female infant was seen at Children's Memorial Hospital, Chicago, for evaluation of hypertrichosis of the trunk and proximal extremities that had been present since birth. She was the product of an uncomplicated full-term pregnancy and vaginal delivery. Her growth and development were normal. The patient's mother reportedly had a history of hypertrichosis, but additional details of the family history were unavailable.Physical examination revealed excessive hair on the presacral area, buttocks, thighs, shoulders, and upper arms (Figs 1 and 2). On palpation, there was minimal induration in some of the hypertrichotic areas but no apparent tenderness. There was no associated alteration in pigmentation.Two biopsy specimens were obtained, one from the left posterior shoulder and the other from the right buttock. Sections from both areas showed several normal-appearing hair follicles along with numerous discrete bundles of spindle cells scattered throughout the dermis (Fig 3).
Andrew P. Truhan, Nancy B. Esterly. Hypertrichotic Skin-Colored Patches in an Infant. Arch Dermatol. 1985;121(9):1197–1198. doi:10.1001/archderm.1985.01660090111027