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January 1989

The Ridgeback Anomaly: A New Follicular Pattern of the Scalp

Author Affiliations


From the Department of Dermatology, Walter Reed Army Medical Center, Washington, DC.

Arch Dermatol. 1989;125(1):98-102. doi:10.1001/archderm.1989.01670130100015

• A patient with an anomaly of hair pattern development is described. Scalp hair follicles generally grow at a downward inclination to the scalp surface. Normal whorled patterns appear in the posteroparietal area. The patient described was noted to have a whorled hair pattern located over the right temporoparietal region, growing in a clockwise direction. The remainder of the scalp adopted the upward follicular growth pattern of the posterior portion of the whorl, directed toward the apical anatomic axis. A ridge of hair over the nape of the neck reversed direction, similar to hair growth on the Rhodesian Ridgeback dog, growing in a downward manner. The relationship of this new hair pattern to current theories of scalp hair pattern development is reviewed.

(Arch Dermatol 1989;125:98-102)

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