{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,12]],"date-time":"2026-06-12T14:14:06Z","timestamp":1781273646368,"version":"3.54.1"},"reference-count":32,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2004,9,1]],"date-time":"2004-09-01T00:00:00Z","timestamp":1093996800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Australasian Radiology"],"published-print":{"date-parts":[[2004,9]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>Radiation\u2010induced brain disorders (RIBD) are uncommon and they are grave sequelae of conventional radiotherapy. In the present report, we describe the clinical spectrum of RIBD in 11 patients who received post\u2010surgery conventional megavoltage irradiation for residual pituitary tumours. Of these 11 patients (nine men, two women), seven had been treated for non\u2010functioning pituitary tumours and four for somatotropinomas. At the time of irradiation the age of these patients ranged from 30 to 59 years (mean, 39.4\u2003\u00b1\u20038.3; median, 36) with a follow\u2010up period of 6\u221296 months (mean, 18.3\u2003\u00b1\u200326.4; median, 11). The dose of radiation ranged from 45 to 90\u2003Gy (mean, 51.3\u2003\u00b1\u200313.4; median, 45), which was given in 15\u221230 fractions (mean, 18.6\u2003\u00b1\u20035.0; median, 15) with 2.8\u2003\u00b1\u20030.3\u2003Gy (median, 3) per fraction. The biological effective dose calculated for late complications in these patients ranged from 78.7 to 180\u2003Gy (mean, 99.1\u2003\u00b1\u200327.5; median, 90). The lag time between tumour irradiation and the onset of symptoms ranged from 6 to 168 months (mean, 46.3\u2003\u00b1\u200357.0; median, 57). The clinical spectrum of RIBD included new\u2010onset visual abnormalities in five, cerebral radionecrosis in the form of altered sensorium in four, generalized seizures in four, cognitive dysfunction in five, dementia in three and motor deficits in two patients. Magnetic resonance imaging (MRI)\/CT of the brain was suggestive of radionecrosis in eight, cerebral oedema in three, cerebral atrophy in two and second neoplasia in one patient. Associated hormone deficiencies at presentation were hypogonadism in eight, hypoadrenalism in six, hypothyroidism in four and diabetes insipidus in one patient. Autopsy in two patients showed primitive neuroectodermal tumour (PNET) and brainstem radionecrosis in one, and a cystic lesion in the left frontal lobe following radionecrosis in the other. We conclude that RIBD have distinctive but varying clinical and radiological presentations. Diabetes insipidus and PNET as a second neoplastic disorder in adults following pituitary irradiation have not been reported previously.<\/jats:p>","DOI":"10.1111\/j.0004-8461.2003.01237.x","type":"journal-article","created":{"date-parts":[[2004,9,1]],"date-time":"2004-09-01T14:56:59Z","timestamp":1094050619000},"page":"339-346","source":"Crossref","is-referenced-by-count":30,"title":["Radiation\u2010induced brain disorders in patients with pituitary 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