Juvenile xanthogranuloma presenting rapid progression after curettage: a case report with clinicopathological findings

Juvenile xanthogranuloma is a relatively uncommon benign cutaneous fibrohistiocytic lesion that shows spontaneous regression. We report a case of juvenile xanthogranuloma, which formed a relatively large nodule and rapidly progressed after curettage. A 9-month-old girl had a mass in the skin over the lumbar region of her back that extended to the fascia. The lesion was histologically diagnosed as juvenile xanthogranuloma after total resection of the mass. Although preoperative diagnosis is quite difficult, plastic surgeons should be familiar with this entity. Juvenile xanthogranuloma should be considered in the differential diagnosis of benign tumours and tumour-like lesions in infants. The clinical presentation and histological findings are discussed.