گرانولوما آنولار زیرجلدی در یک پسربچه‌ی 3 ساله: گزارش موردی نادر

Introduction: Subcutaneous granuloma annulare is a rare subtype of granuloma annulare that take place almost completely in children. The etiology and pathogenesis of subcutaneous granuloma annulare are not completely understood. Precipitating factors such as physical trauma , insect bites, bacterial and viral infections and diabetes have been considered. Case Report: A 3-year-old boy with right thumb lesion from three months ago as well as right forearm lesion refered to us. Cutaneous biopsy from right thumb lesion revealed degenerative collagen fiber (necrobiosis) with palisading histiocytes and lymphocytes with focal mucin deposition. These findings were compatible with subcutaneous granuloma annulare. Conclusion: Subcutaneous granuloma annulare should be included in the differential diagnosis in a child with finger swelling and subcutaneous nodules.