RINGED HAIR

Abstract

RINGED hair, or, as it is also termed, pili annulati and leukotrichia annularis, is an abnormality which has interested physicians for a hundred years, and its cause is still unsolved. Karsch, 1 in 1846, was the first to describe this anomaly and called it ringel haare. Galloway 2 in 1896 reported two brothers with this rare disease and was the first to state that it was hereditary. Since then, Cady and Trotter, 3 Snell and Foley, 4 Reyn 5 and Juon 6 reported ringed hair in several generations. Snell and Foley and Juon have traced its incidence through four generations. Cady and Trotter in 1922 wrote an extensive treatise on this anomaly. Our case is the first to be reported in the American literature since Snell and Foley's paper in 1932 and the first recorded case in which the axillary hair was also involved. Scalp hair is the common site