[MRI findings in pituitary-hypothalamic axis Langerhans cell histiocytosis]. / Apport de l'IRM dans le diagnostic de l'histiocytose langerhansienne hypothalamo-pituitaire.

Pituitary-hypothalamic axis Langerhans cell histiocytosis is an uncommon entity. It is a rare disease in adults. The CT and MR study provides us the best anatomo-topographic evaluation and determine the precise size of the lesion which are necessary to the treatment. We report a case of hypothalamic involvement by Langerhans cell histiocytosis accompanied by lesions in bone affecting a 31-year-old woman. The clinical, histiotological and CT/MR findings of histiocytosis X are described in this article.