Psoriasiform Graft-Versus-Host Disease: Report and Brief Review of the Literature

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Graft-versus-host disease (GVHD) is the primary cause of morbidity and non–relapse-related mortality after hematopoietic stem cell transplantation. GVHD is classically divided into acute and chronic forms; acute cutaneous GVHD presents as a morbilliform eruption, whereas chronic cutaneous GVHD presents with lichen planus–like or sclerodermoid morphology. Psoriasiform GVHD is a rarely described subtype that is challenging to distinguish clinically from psoriasis. In addition to classic psoriasiform histologic findings, demonstration of an often subtle vacuolar interface dermatitis and lymphocyte satellitosis are helpful for discrimination. Herein, the authors describe psoriasiform GVHD and review the clinicopathologic findings of this unusual variant. With the appropriate clinical findings, psoriasiform GVHD should be considered in the histologic differential diagnosis of a mixed tissue reaction pattern with both psoriasiform and interface changes.

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