PITUITARY ADENOMA AND VISUAL FUNCTION

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Abstract
The series studied included 51 patients subjected to operation for pituitary adenoma. The visual status was analyzed pre- and postoperatively. The pre- and postoperative parameters were compared with clinical information, ophthalmological and neuroradiological findings with a view to an evaluation of their prognostic value. In 36 patients with chromophobe adenoma, visual field defects were present in 92% before operation: visual function improved in 62% and returned to normal in 24%. Among 15 patients with eosinophil or mixed adenoma, only 2 (13%) had visual field defects preoperatively. In those patients where operation was followed by distinct visual improvement, the preoperative ophthalmological findings were as follows: visual acuity greater than 6/24, normal optic discs, visual field defects up to 2 quadrants and pneumoencephalographic findings suggestive of only a small suprasellar tumor.