Secondary cutaneous diffuse large B-cell lymphoma presenting with focal vesicular lesions.

Blister formation as a presentation of B-cell lymphoma is extremely rare; only one case has been previously reported in the literature to our knowledge. We report a patient known to have refractory systemic diffuse large B-cell lymphoma who presented with nodules with overlying vesicular lesions, which was consistent with secondary cutaneous spread of diffuse large B-cell lymphoma.