Becker's Nevus. Presented by Alfred W. Kopf, MD, and J. Yuppa, MD.
Three or four years ago, a 25-year-old white man first noted an asymptomatic, pigmented area developing on the right upper portion of his back. Since that time the area has increased in size, and hair on it has increased notably in the past year.Examination revealed brownish pigmentation and hypertrichosis on the right upper portion of the back, the right shoulder, arm, and in the right axilla.
Dr. Kopf: This patient presents the classical clinical picture of the entity described by S. William Becker as "concurrent melanosis and hypertrichosis in the distribution of nevus unius lateris."1 This nevus usually appears in the second or third decade of life. It commonly begins as an area of macular, café-au-lait hyperpigmentation somewhere on the upper half of the trunk or on the proximal portions of the upper extremities. Hypertrichosis
Sachs PM, Silver H, Cohen HJ. DERMATOLOGIC SOCIETY OF GREATER NEW YORK. Arch Dermatol. 1968;98(1):97-105. doi:10.1001/archderm.1968.01610130103023