Acneiform eruption due to eruptive vellus hair cysts.

We have reported a case of eruptive vellus hair cysts, a rare type of acneiform eruption. Patients with unusual or refractory acneiform eruptions may have any of a variety of non-acne-vulgaris lesions. For this reason, biopsy and culture of these lesions may be helpful in establishing a correct diagnosis and determining proper treatment.