Abstract:
:A 41-year-old male with primary hypothyroidism and a huge TSH-secreting pituitary tumor presented with a bleeding nasal mass that was initially misdiagnosed as a paraganglioma. Other unique features of the case include lack of complaints related to hypothyroidism, an extremely elevated TSH level of 3474 mU/l, and a low prolactin level. The presence of primary hypothyroidism made differentiating TSH-secreting pituitary adenoma from secondary thyrotroph hyperplasia difficult. A low molar ratio of alpha-subunit to TSH on presentation, together with normalization of TSH level and a 50% reduction in the size of the tumor after 6 weeks of thyroxine replacement therapy, suggested the presence of thyrotroph hyperplasia. However, the lack of further decrease in the size of the tumor that was associated with increased metabolic activity on 18-FDG PET scan, intense uptake on octreotide scan, and an elevated alpha-subunit to TSH molar ratio despite the normalization of free T4 and TSH levels for 16 months suggested the coexistence of thyrotroph adenoma. Together, the findings support the view that thyrotroph adenoma/irreversible hyperplasia can result from long standing primary hypothyroidism.
journal_name
J Endocrinol Investjournal_title
Journal of endocrinological investigationauthors
Ghannam NN,Hammami MM,Muttair Z,Bakheet SMdoi
10.1007/BF03343584keywords:
subject
Has Abstractpub_date
1999-06-01 00:00:00pages
419-23issue
6eissn
0391-4097issn
1720-8386journal_volume
22pub_type
杂志文章abstract::The changes occurring in the levels of circulating thyroid microsomal antibody (M-Ab) and antithyroglobulin antibody (Tg-Ab) during antithyroid drug therapy were studied in 32 patients receiving methimazole for Graves' disease. M-Ab was determined by competitive binding radioassay and Tg-Ab by a sandwich radiometric m...
journal_title:Journal of endocrinological investigation
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doi:10.1007/BF03350476
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journal_title:Journal of endocrinological investigation
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doi:10.1007/BF03343655
更新日期:1999-12-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03343898
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:
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abstract::It has been shown that human calcitonin (hCT) is absorbed through the nasal mucosa when administered together with promoters like sodium glycocholate (SGC) or dihydrofusinate. The aim of this study was to compare the clinical and metabolic effect of intranasal (in) and intramuscular (im) hCT in patients with osteoporo...
journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03348250
更新日期:1980-04-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
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journal_title:Journal of endocrinological investigation
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更新日期:2005-09-01 00:00:00
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更新日期:2020-10-09 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-020-01228-2
更新日期:2020-09-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350002
更新日期:1989-05-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
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更新日期:1988-06-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
doi:10.1007/s40618-018-0872-6
更新日期:2018-11-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2004-04-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03347936
更新日期:1991-11-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-014-0081-x
更新日期:2014-07-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-015-0319-2
更新日期:2016-01-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03343867
更新日期:2001-05-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/BF03350657
更新日期:1985-04-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,meta分析,评审
doi:10.1007/s40618-014-0069-6
更新日期:2014-05-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
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更新日期:1982-11-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,多中心研究
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更新日期:2017-06-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,评审
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更新日期:2004-12-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 临床试验,杂志文章
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更新日期:1993-04-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章,随机对照试验
doi:10.1007/s40618-013-0016-y
更新日期:2014-02-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
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journal_title:Journal of endocrinological investigation
pub_type: 杂志文章
doi:10.1007/s40618-014-0100-y
更新日期:2014-09-01 00:00:00