[Pituitary invasive adenoma in a child. Case report of unusual extensive invasion of the orbit (author's transl)].

A rare instance of pituitary invasive adenoma in a child has been reported; the unusual age of the patient and then the rarity of the orbit invasion has been emphasized. It has been further pointed out the histologically benign nature of the neoplasm, which on contrast behaves like a malignant adenoma, according to its rapid and serious anatomo-clinical evolution.