An enhancing pituitary lesion in a young woman: a diagnostic dilemma.

Wegener's granulomatosis is a systemic small-vessel vasculitis predominantly involving the upper airways, lungs and kidneys. Central nervous system involvement is known to occur in 10% of cases, manifesting as diffuse meningeal involvement and cerebral granulomatous lesions, but isolated involvement of the pituitary is extremely rare. We describe a case of isolated pituitary involvement with abscess formation secondary to Wegener's granulomatosis in a 21-year-old woman. To the best of our knowledge this is the first reported case of pituitary abscess formation secondary to Wegener's granulomatosis.