A Case of B Cell Pseudolymphoma in an Infant Showing Disseminated Papular Distribution / 대한피부과학회지

ABSTRACT

Cutaneous pseudolymphoma is a heterogeneous group of benign reactive T- or B-cell lymphoproliferative diseases of the skin that simulate cutaneous lymphomas histologically and, sometimes, clinically. Thus far, only a few cases of pseudolymphomas showing atypical clinical manifestations have been reported. A 10-month-old boy presented with multiple flesh-colored, yellowish erythematous disseminated papules on the face, abdomen, and arms. The cutaneous lesions morphologically resembled molluscum contagiosum, Langerhans cell histiocytosis, or juvenile xanthogranuloma. Punch biopsy and immunohistochemistry studies were performed, and the lesion was identified as a cutaneous B-cell pseudolymphoma. Most of the lesions were cleared within a month with systemic corticosteroids and oral antihistamine administration. In this report, we present an interesting rare case of infantile cutaneous B-cell pseudolymphoma mimicking many other dermatological diseases in addition to a cutaneous lymphoma.