Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report

Silent thyroiditis during pregnancy is an under-recognized clinical condition and a rare case, often manifesting as transient hypothyroidism. We report a 23-year-old woman at 8 weeks of gestation who presented with newly diagnosed hypothyroidism [TSH = 85 mIU/L (0.4–4.5), FT4 = 0.4 ng/dL (0.7–2.5),...

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Main Authors: Mahmoud Ali Kaykhaei, Shahin Nosratzehi
Format: Article
Language:English
Published: Tehran University of Medical Sciences 2025-04-01
Series:Case Reports in Clinical Practice
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Online Access:https://crcp.tums.ac.ir/index.php/crcp/article/view/1012
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author Mahmoud Ali Kaykhaei
Shahin Nosratzehi
author_facet Mahmoud Ali Kaykhaei
Shahin Nosratzehi
author_sort Mahmoud Ali Kaykhaei
collection DOAJ
description Silent thyroiditis during pregnancy is an under-recognized clinical condition and a rare case, often manifesting as transient hypothyroidism. We report a 23-year-old woman at 8 weeks of gestation who presented with newly diagnosed hypothyroidism [TSH = 85 mIU/L (0.4–4.5), FT4 = 0.4 ng/dL (0.7–2.5), and anti-TPO = 78 IU/mL (up to 16)]. Thyroid function tests had been normal eight months prior. Levothyroxine (LT4) therapy was initiated, restoring euthyroidism. Treatment was discontinued postpartum, and the patient maintained normal thyroid function for over one year. Our case is unique in that silent thyroiditis occurred unusually early in pregnancy and differed from the more common postpartum cases. Silent thyroiditis should be considered in pregnancy-related hypothyroidism, particularly when prior thyroid function was normal. Prompt diagnosis and treatment can prevent adverse maternal and fetal outcomes.
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spelling doaj-art-e3c4f4da385b4376a4e414c711a30c0c2025-08-20T01:51:13ZengTehran University of Medical SciencesCase Reports in Clinical Practice2538-26832538-26912025-04-019510.18502/crcp.v9i5.18453Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case ReportMahmoud Ali Kaykhaei0Shahin Nosratzehi1Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.Department of Internal Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. Silent thyroiditis during pregnancy is an under-recognized clinical condition and a rare case, often manifesting as transient hypothyroidism. We report a 23-year-old woman at 8 weeks of gestation who presented with newly diagnosed hypothyroidism [TSH = 85 mIU/L (0.4–4.5), FT4 = 0.4 ng/dL (0.7–2.5), and anti-TPO = 78 IU/mL (up to 16)]. Thyroid function tests had been normal eight months prior. Levothyroxine (LT4) therapy was initiated, restoring euthyroidism. Treatment was discontinued postpartum, and the patient maintained normal thyroid function for over one year. Our case is unique in that silent thyroiditis occurred unusually early in pregnancy and differed from the more common postpartum cases. Silent thyroiditis should be considered in pregnancy-related hypothyroidism, particularly when prior thyroid function was normal. Prompt diagnosis and treatment can prevent adverse maternal and fetal outcomes. https://crcp.tums.ac.ir/index.php/crcp/article/view/1012HypothyroidismPregnancyThyroiditisTransientThyroid dysfunction
spellingShingle Mahmoud Ali Kaykhaei
Shahin Nosratzehi
Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
Case Reports in Clinical Practice
Hypothyroidism
Pregnancy
Thyroiditis
Transient
Thyroid dysfunction
title Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
title_full Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
title_fullStr Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
title_full_unstemmed Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
title_short Silent Thyroiditis Presented as Transient Hypothyroidism during Pregnancy: A Case Report
title_sort silent thyroiditis presented as transient hypothyroidism during pregnancy a case report
topic Hypothyroidism
Pregnancy
Thyroiditis
Transient
Thyroid dysfunction
url https://crcp.tums.ac.ir/index.php/crcp/article/view/1012
work_keys_str_mv AT mahmoudalikaykhaei silentthyroiditispresentedastransienthypothyroidismduringpregnancyacasereport
AT shahinnosratzehi silentthyroiditispresentedastransienthypothyroidismduringpregnancyacasereport