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- W2056422736 abstract "The aim of this study was to determine the hormones produced in pituitary gland tumours (TM) following fractionated external irradiation in rats. The TM arose in the course of studies on other questions of radiation effects.The left neck and skull base of sixty female Wistar rats, 3 to 4 months of age at the beginning of the external irradiation, were subjected to roentgen rays exposure, fractionated to 2 Grays daily, either up to 20, 40 or 60 Gy. The midline of the neck and skull was always inside the radiation field. The animals were sacrificed either 6 months or 12 months after completion of the randomly assigned irradiation protocol. Five non-irradiated rats served as controls.No TM developed in the non-irradiated animals. Out of 60 irradiated rats 9 developed a pituitary TM (15%). In remnants of the normal adenohypophysis we revealed immunohistochemical reactivity for growth hormone (GH), adrenocorticotropic hormone (ACTH), prolactin (PRL), thyroid stimulating hormone (TSH), and follicle stimulating hormone (FSH). In the radiation-induced adenomas, 4 TM were immuno-reactive for TSH, 4 for GH, 2 for PRL, and 2 for FSH. The TM did not react with anti-ACTH and anti-LH (luteinizing hormone) anti-sera.Obviously, irradiation accelerates the development of pituitary gland adenomas. In this series the TM were predominantly incidental findings at necropsies after pretermed follow-up intervals with a variety of hormone-producing cells. On the other hand, four of nine TM were null adenomas. Necropsies of the brain should be carried out routinely in irradiation studies of the skull." @default.
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- W2056422736 date "2001-05-01" @default.
- W2056422736 modified "2023-09-28" @default.
- W2056422736 title "Immunhistochemischer Nachweis von Hormonen in Hypophysenadenomen der Ratte nach fraktionierter Bestrahlung" @default.
- W2056422736 doi "https://doi.org/10.1055/s-2001-13887" @default.
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