THIN-SECTION CT SCAN OF THE PITUITARY GLAND Teruo Fukuda 1 , Yuichi Inoue 1 , Shuji Taniguchi 1 , Junro Oda 1 , Kazumasa Takemoto 1 , Yutaka Nemoto 1 , Yoshiaki Minamikawa 1 , Yasuto Onoyama 1 , Hiroshige Kishi 2 , Akira Hakuba 2 , Shuro Nishimura 2 1Department of Radiology, Osaka City University, School of Medicine 2Department of Neurosurgery, Osaka City University, School of Medicine pp.139-144
Published Date 1982/2/1
DOI https://doi.org/10.11477/mf.1406204892
  • Abstract
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Topographic anatomy of the pituitary fossa was studied by 2mm thin-section CT scan (Somatom II). Nineteen with normal pituitary (control group) and 20 with suspected pituitary abnormality were se-lected. Plain and contrast CT were performed in all cases. Contrats CT was carried out immediately after the rapid infusion of 220ml of 30% iodinated contrast medium.

In all of control group but two, pituitary gland was detected as homogenous density and its density was as same as density of normal brain tissues, and was enhanced in degree of about 25CT number. In 2 cases, small low density was visualized in the pituitary gland. Pituitary gland was differentiated from cavernous sinus was usually higher than thepituitary gland.

In abnormal group, the microadenoma of the pituitary gland was diagnosed in 5 cases and 3 out of 5 cases was proved by surgery. All 3 micro-adenomas proved slightly dense by plain CT and enhanced higher than normal pituitary gland by contrast CT. Polytomograms showed no abnormal-ity of the sella turcica in one of these 3 cases. Although 3 microadenomas were detected by the abnormal enhancement, we are not sure whether all of microadenoma can be detected by CT alone.

Arachnoid herniation into the pituitary fossa was diagnosed in 7 of control group and 2 of abnormal group. Four out of these 9 cases were verified by using Metrizamide CT. By plain thin-section CT, the diagnosis of arachnoid herniation seems to be possible without Metrizamide CT.

Copyright © 1982, Igaku-Shoin Ltd. All rights reserved.


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