Antinuclear antibody seropositivity in men with cutaneous B-cell lymphoma of the scalp

Patient 1: A 65-year-old Caucasian man presented with a 2-month history of large erythematous patches of the right temporal scalp. The patient was otherwise in good health and taking no medications. He denied a family history of lymphomas or autoimmune diseases. No hepatosplenomegaly or lymphadenopathy was appreciated. A complete blood cell count, serum protein electrophoresis, peripheral blood flow cytometric analysis, bone marrow biopsy, Helicobacter pylori titers, and Borrelia burgdorferi titers were within normal range. The antinuclear antibody titer was positive at 1:640 and showed a homogenous pattern. Rheumatoid factor, SSA (Ro), and SSB (La) antibody titers were negative. Computed tomography scans of the chest, abdomen, and pelvis were unremarkable. Two punch biopsies from different time points demonstrated an atypical lymphocytic infiltrate forming clusters in the dermal and subcutaneous tissue. These cells had a (14;18) translocation and were mostly positive for CD20 and bcl-6, but not bcl-2. The patient was diagnosed with low-grade primary cutaneous follicle center lymphoma based on clinicopathological evidence, and achieved complete remission after local radiation and 6 cycles of rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone. The patient has had no evidence of recurrence for 6 years.