Acne keloidalis: a review.

Acne keloidalis is a chronic scarring folliculitis located on the posterior neck of young black men. It is manifest clinically by follicular papules that coalesce into firm plaques and nodules. Examination of early lesions shows that inflammation begins at the deep infundibular and isthmic levels of the hair follicle and is accompanied by absence of sebaceous glands. The etiology of acne keloidalis is uncertain, but centers around anatomic, infectious, and autoimmune theories. Successful surgical therapy of advanced cases can be carried out using a number of methods as long as subfollicular destruction of the process is achieved.