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    Chronic lymphocytic leukemia revealed by a branulomatous zosteriform eruption.

    Skinmed 2012 Jan-Feb;10(1):50-2
    Department of Dermatology, La Rabat Hospital, Tunis Tunisia.
    A 70-year-old woman presented with an atypical erythematopapular zosteriform eruption of 3 weeks' duration. The patient had no history of previous vesicular eruption. She developed a painful burning sensation on the neck. Clinical examination revealed a cluster of small erythematous firm papules and plaques in a zosteriform distribution on the left ear, face, neck, and shoulder (Figure 1A). The lesions were unilateral and did not cross the midline. Multiple cervical and axillary lymph nodes were palpable. Laboratory tests revealed an increase in white blood cells of 25,000/mm3, with 17,910/mm3 lymphocytes and a normal range of hemoglobin, platelets, creatinine, and liver enzymes. Erythrocyte sedimentation rate was 87 mm. Blood smear results showed small, morphologically mature lymphocyte cells. In immune phenotyping, lymphocyte cells co-express CD5 and B-cell-surface antigens CD19 and CD23, as well as a restriction of kappa immunoglobulin light chains. The cells were CD22-, CD79b-, CD38-, CD10-, CD25- and FMC7-. Computed thoracoabominal tomography revealed cervical, mediastinal, abdominal, and pelvic adenopathy confirming the diagnosis of B-cell chronic lymphocytic leukemia (B-CLL) stage B. Histology of a skin biopsy from a papule showed a dense nodular granulomatous infiltrate in the dermis (Figure 2A). The infiltrate contained epithelioid and giant cells surrounded by lymphocytes and plasma cells. Small monomorphic lymphocytes without mitotic figures predominated (Figure 2B). The epidermis was irregularly thickened. Immunohistology revealed a polymorphous infiltrate with a phenotype of reactive T lymphocytes (CD3, CD5 positive) (Figure 2C), B lymphocytes (CD20 positive) (Figure 2D). Epithelioid and giant cells were positive for CD68 (Figure 2E). A latent herpes zoster infection with granulomatous reaction at the site ofzoster lesions was highly suspected as the patient reported a unilateral burning sensation without a history of vesicular zosteriform eruption. She received treatment with intravenous acyclovir 10 mg/kg every 8 hours. The papular lesions resolved markedly (60%) on macular plaques at the end of the treatment. Following topical treatment with corticosteroids, the lesions healed completely within 4 weeks (Figure 1B). Concerning leukemia, our patient was monitored without therapy by the hematologist.

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