[Misdiagnosed childhood sarcoidosis as non-Langerhans' cell histiocytosis treated with tumor necrosis factors-α antagonists].

Sarcoidosis is a chronic multisystemic granulomatous disease of unknown origin. Generalised eruptive histiocytosis is a rare, benign, self-healing, non-Langerhans' cell histiocytosis (non-LCH). We report the case of an 8-year-old girl with sarcoidosis who was misdiagnosed as non-LCH. She was treated with oral corticosteroids, methotrexate and adalimumab, but there was insufficient control of ocular disease. The introduction of infliximab achieved a control of the uveitis and enabled the corticosteroid dose to be tapered. In some cases of sarcoidosis the lack of well-organised granuloma formation at the beginning of the disease, and the presence of prominent giant cells may suggest alternative diagnoses, such as non-LCH. Although the experience of tumour necrosis factor-α antagonists use in children with sarcoidosis is limited, these drugs may be helpful for those patients experiencing a severe and refractory disease.