Hyperkeratosis lenticularis perstans.

Flegel's disease, also known as hyperkeratosis lenticularis perstans, is a rare skin disease characterized by small reddish-brown asymptomatic hyperkeratotic papules usually located on the lower extremities. The histopathological features are hyperorthokeratosis, epidermal atrophy and band-like inflammatory infiltrate in the superficial dermis. Treatment is generally ineffective. We report a case of hyperkeratosis lenticularis perstans that improved following excisional biopsy of the lesions.