Lymphocytic hypophysitis: a rare cause of hyperprolactinaemia.

Lymphocytic hypophysitis is one of the rare causes of hypopituitarism and intrasellar mass observed almost exclusively in women. A temporal relationship to pregnancy has been identified in many but not all of the 34 reported cases. Intra-operative differentiation from non-secretory macroadenoma is important, as resection of the anterior lobe is unnecessary in these individuals and pituitary function may spontaneously return to normal. The authors present the case of a woman with symptomatic hyperprolactinaemia 10 years after her last pregnancy.