Primary cutaneous angiotropic large-cell lymphoma in a patient with acquired immunodeficiency syndrome.

Patients with acquired immunodeficiency syndrome are at increased risk of developing malignant lymphoma, particularly of the large noncleaved, immunoblastic, and small noncleaved cell types. Angiotropic large-cell lymphoma, a relatively rare high-grade lymphoma, has not previously been described in the setting of acquired immunodeficiency syndrome. Because angiotropic large-cell lymphoma most commonly involves the skin and central nervous system, and because of its relative rarity, its presentation in the skin of a patient with acquired immunodeficiency syndrome may pose a diagnostic dilemma.