Eosinophilic granuloma of the palatal mucosa in a nine-week-old infant.

Histiocytosis commonly presents as a disseminated disease in children under one year of age and is rare in infants less than three months of age. This case describes a nine-week-old infant with unifocal eosinophilic granuloma without bone involvement. One year after surgical excision the child is free of disease by roentgenographic and laboratory studies and is growing and developing normally. Thus our patient demonstrates several unique features, which include a young age at presentation without disease dissemination and an unusual site of tissue involvement without bone extension.