Acne fulminans.

Acne fulminans is a rare and severe variant of acne. In Brazilian medical journals, cases are infrequently reported, confirming its rarity. We followed five young male patients with this severe variant of cutaneous lesions, accompanied by also severe systemic symptoms: fever, anorexia, weight loss, and arthralgia. All had a good response to corticosteroids (prednisone), but had significant scarring.