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PROGRESSIVE VISUAL FAILURE IN ACROMEGALY FOLLOWING EXTERNAL PITUITARY IRRADIATION
Author(s) -
ATKINSON A. B.,
ALLEN I. V.,
GORDON D. S.,
HADDEN D. R.,
MAGUIRE C. J. F.,
TRIMBLE E. R.,
LYONS A. R.
Publication year - 1979
Publication title -
clinical endocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 147
eISSN - 1365-2265
pISSN - 0300-0664
DOI - 10.1111/j.1365-2265.1979.tb02103.x
Subject(s) - medicine , acromegaly , necrosis , pituitary gland , radiation therapy , radiology , hormone , growth hormone
SUMMARY Four out of twenty‐three acromegalic patients selected for treatment with external megavoltage pituitary irradiation between 1961 and 1975 developed progressive visual failure. They had received megavoltage external irradiation through multiple portals from a cobalt‐60 unit over a period of 3 weeks. Visual deterioration began 2 months to 6 years after irradiation. In two patients the optic nerves were explored. In both, post‐mortem later confirmed radiation damage to the optic nerves and hypothalamus. In one case there was also necrosis of the right frontal lobe with necrosis and inflammation of the bone surrounding the pituitary fossa. In the two other patients, extensive clinical and neuroradiological investigation excluded the presence of a suprasellar mass as a cause for this visual failure and a clinical diagnosis of radiation necrosis was made.