Bacillary angiomatosis of the scalp in a human immunodeficiency virus-negative patient.

Bacillary angiomatosis (BA) is a recently recognized bacterial infectious disease that is mainly seen in patients with the acquired immunodeficiency syndrome. BA has rarely been reported in immunocompetent individuals. A case of BA of the scalp in an immunocompetent patient, who was human immunodeficiency virus seronegative, is reported. The importance of differential diagnosis of this lesion is emphasized.