Complete resolution of primary cutaneous marginal zone B-cell lymphoma on the cheek of a 7-year-old boy with intralesional triamcinolone and tincture of time.

A 7-year-old healthy boy presented with an asymptomatic smooth, firm red plaque on the cheek. Histopathology, immunostaining, molecular testing and imaging confirmed a diagnosis of a primary cutaneous marginal zone B-cell lymphoma. The lesion was treated with intralesional triamcinolone, with complete clinical resolution achieved within one year. Intralesional steroid injection is an effective first-line modality for the treatment of patients with limited disease in cosmetically sensitive areas.