Most of the normal cutaneous processes, including hair growth, show a bilateral symmetry. We report a case of striking asymmetry of facial hair in a nondermatomal pattern.
Report of a Case
A 50-year-old woman of English heritage had a five- or six-year history of asymptomatic hair growth localized to the left side of the face. She denied any topical therapy, trauma, or facial surgery. She is gravida 6, para 6, and had a bilateral salpingo-oophorectomy in 1963. There is no family history of hirsutism.On physical examination she had dense terminal hair growth over the left cheek that extended exactly to the midline above the mouth, but spared the chin (Fig 1 and 2), in portions of the second and third divisions of the trigeminal nerve distribution. The face appeared symmetrical, and the skin on both sides was of normal texture and pigmentation. Vellous hair growth on the right cheek
Thomsen RJ, Webster SB. Idiopathic Unilateral Facial HirsutismReport of a Case. Arch Dermatol. 1979;115(1):99-100. doi:10.1001/archderm.1979.04010010067023