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Postmortem measurements of thyroid hormones in blood and vitreous humor combined with histology
Linköping University, Faculty of Health Sciences. Linköping University, Department of Molecular and Clinical Medicine, Forensic Medicine.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Molecular and Clinical Medicine, Forensic Medicine.
2001 (English)In: American Journal of Forensic Medicine and Pathology, ISSN 0195-7910, E-ISSN 1533-404X, Vol. 22, no 1, 78-83 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to investigate whether clinical reference premortem values can be used to assess postmortem concentrations of thyroxine, triiodothyronine, and thyroid stimulating hormone (TSH), to compare the postmortem concentrations in blood and vitreous humor, and to study the possibility of diagnosing hyperthyroidism by comparing thyroid histologic appearance and postmortem hormone values. Biochemical analyses of free thyroxine (FT4), free triiodothyronine (FT3), and TSH in femoral blood and vitreous humor were made in 38 cases. In 40 cases, the hormones and thyroid histologic appearance were studied, 22 had no significant pathologic changes, and 18 showed focal hyperplasia of the follicular epithelium. A positive correlation was seen between the femoral blood and vitreous humor concentrations of FT4 (R = 0.66) but not between the corresponding concentrations of FT3 and TSH. A positive correlation was also seen between FT3 and FT4 in femoral blood (R = 0.74). In cases with normal thyroid histologic appearance, 58% were found to have FT4 values >24 pmol/L (clinical reference interval 9-24 pmol/L), mean value 27.5 ▒ 9.4 pmol/L), which did not differ from the FT4 values in the cases with hyperplasia, 31.6 ▒ 15 pmol/L. Only 5% of the T3 measurements in the group with normal histologic appearance were >9 pmol/L (clinical reference interval 3-9 pmol/L). The mean value of FT3 in cases with normal histologic appearance was 3.4 ▒ 1.3 pmol/L, and in the group with hyperplasia 8.6 ▒ 6.1 pmol/L. The difference was statistically significant P < .005). It is concluded that postmortem values of FT3 and FT4 in femoral blood are fairly comparable to premortem clinical reference values, but the upper normal limit, especially for T4. has to be adjusted upward. Analysis of vitreous humor cannot be used post mortem to assess thyroid function. Histologically, hyperplastic changes correlate well with elevated FT3 in femoral blood.

Place, publisher, year, edition, pages
2001. Vol. 22, no 1, 78-83 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-25882DOI: 10.1097/00000433-200103000-00016Local ID: 10322OAI: oai:DiVA.org:liu-25882DiVA: diva2:246430
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2017-12-13

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Edston, Erik

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