Subcutaneous granuloma annulare: recognition and treatment.

Subcutaneous granuloma annulare (SGA) is a benign inflammatory disorder that occurs in children. The profiles of 12 children with SGA who were diagnosed and treated at our institution were reviewed. The patients presented with a rapidly growing, painless soft-tissue mass of the extremities or scalp. Parental concerns of malignancy and lack of recognition of this condition by the physician led to excessive diagnostic testing and, on occasion, inappropriate therapy. The mean age at presentation was 3.9 years, and the mean follow-up after biopsy study was 3.4 years. The lesions were most commonly located about the elbow, knee, and scalp. While complete blood count, erythrocyte sedimentation rate, and plain radiographs were helpful in ruling out other conditions, no ancillary test was specific for this disorder. In all cases, definitive diagnosis required a biopsy sample. Excisional biopsy was diagnostic but not therapeutic, because 75% of the children had one or more recurrences of this condition at either local or distant sites. Two of the subsequent lesions resolved spontaneously, and no child within the study group has progressed to any recognized systemic illness or connective-tissue disorder.