[Pituitary abscess].

A pituitary abscess case clinically evolving as an adenoma is presented. The diagnosis was established at the time the surgical procedure was performed. Previous studies and postoperative investigation proved the absence of features accounting for side infection. Moreover, anatomopathological studies also dismissed the existence of any type of tumoral traces. However, due to a lack of experience, the pre-operative magnetic resonance imaging was interpreted as pertaining to pituitary adenoma on the basis of its greater frequency.