Publications by authors named "Miho Fukushita"

It has been reported that Graves' disease (GD) sometimes improves spontaneously during pregnancy, although exacerbation of GD during postpartum period or relapse of hyperthyroidism caused by GD might occur. This study aimed to investigate the incidence of postpartum diagnosis of thyroid eye disease (TED) in relation to thyroid dysfunction. This retrospective cross-sectional study enrolled 11,104 deliveries from the patients with GD between January 2004 and August 2022.

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A 37-year-old, never-smoker, pregnant woman diagnosed with Graves' disease who had stable thyroid eye disease (TED) before pregnancy presented with aggravated proptosis and eyelid swelling at 13 weeks of pregnancy. Despite the administration of local triamcinolone and 3 cycles of corticosteroid pulse therapy from 25 to 28 weeks, the patient's visual acuity decline necessitated postpartum orbital decompression surgery. Although TSH receptor antibody (TRAb) levels decreased during the mid- to late term of pregnancy, the TED worsened.

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Objective: There are few reports of subacute thyroiditis (SAT) during pregnancy. This study aimed to clarify the clinical characteristics of SAT in pregnant patients.

Methods And Results: Seven patients diagnosed with SAT during pregnancy at our institution from January 2004 to December 2021 were identified, and their clinical findings were retrospectively examined.

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Agranulocytosis is a serious adverse effect of methimazole (MMI) and propylthiouracil (PTU), and although there have been reports suggesting a dose-dependent incidence in relation to both drugs, the evidence has not been conclusive. The objective of our study was to determine whether the incidences of agranulocytosis induced by MMI and PTU exhibit dose-dependency. The subjects were 27,784 patients with untreated Graves' disease, 22,993 of whom were on an antithyroid drug treatment regimen for more than 90 days.

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Objective This study assessed the efficacy of machine learning in predicting thyrotoxicosis and hypothyroidism [thyroid-stimulating hormone >10.0 mIU/L] by leveraging age and sex as variables and integrating biochemical test parameters used by the Japan Society of Health Evaluation and Promotion (JHEP) and the Japan Society of Ningen Dock (JND). Methods Our study included 20,653 untreated patients with Graves' disease, 3,435 untreated patients with painless thyroiditis, 4,266 healthy individuals, and 18,937 untreated patients with Hashimoto's thyroiditis.

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  • The study focuses on the treatment of Graves' orbitopathy (GO) in newly diagnosed Graves' disease (GD) patients in Japan, specifically looking at the use of anti-inflammatory and immunosuppressive treatments (AIIST).
  • A total of 1,553 patients were analyzed, finding that only 6.9% received AIIST, which included glucocorticoids and retrobulbar irradiation.
  • Risk factors identified for GO patients undergoing AIIST included older age, elevated TSH binding inhibitory immunoglobulin (TBII), and the absence of thyroglobulin antibodies (TgAb), leading to the development of a predictive GO score to aid in treatment decisions.
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The present study aimed to establish new reference intervals (RIs) for serum free triiodothyronine (fT3), free thyroxine (fT4), and thyroid stimulating hormone (TSH) levels in Japanese children and adolescents aged 4 to 19 years. A total of 2,036 (1,611 girls, 425 boys) participants were included over a 17-year period; they all tested negative for antithyroid antibodies (TgAb, TPOAb) and were found to have no abnormalities on ultrasonography. RIs were determined by nonparametric methods.

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Purposes: To establish the appropriate staging system and assess the role of curative thyroidectomy alone (Surgery) vs. involved-site radiation therapy after open biopsy (OB-ISRT) in stage IE mucosa-associated lymphoid tissue (MALT) lymphoma.

Methods: We examined the Tokyo Classification as a modified classification.

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  • The study investigated how potassium iodide (KI) affects radioiodine uptake (RAIU) in patients with Graves' disease (GD) prior to radioisotope therapy.
  • A total of 82 patients on KI treatment were compared to 354 patients on thiamazole (MMI) treatment, ensuring that all participants had low urinary iodine excretion.
  • Results showed that RAIU was significantly lower in the KI group compared to the MMI group, suggesting KI may suppress RAIU more effectively due to different suppression mechanisms.
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  • A study was conducted on 103 adult patients with congenital hypothyroidism (CH) diagnosed through newborn screening to evaluate their thyroid morphology and function, focusing on those born after 1979.
  • The patients were categorized into Goiter, Normal gland, and Dysgenesis groups; results indicated a significantly low serum free triiodothyronine/free thyroxine ratio in the Dysgenesis group and a higher incidence of thyroid nodules in female CH patients compared to non-CH women.
  • Genetic defects linked to goitrous congenital hypothyroidism were found in 89% of the Goiter group, suggesting that patients with dyshormonogenesis should have regular thyroid ultrasounds due to their increased risk for thyroid nodules
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  • The study investigates neonatal hypothyroidism in newborns of mothers with Graves' disease who continued antithyroid drug (ATD) treatment until delivery, finding an incidence of 19% for methimazole (MMI) users and 12.8% for propylthiouracil (PTU) users.
  • It identifies that the daily ATD doses during the third trimester are crucial predictors for risk; with cutoff doses of 10 mg/day for MMI and 150 mg/day for PTU being significant.
  • Higher maternal thyrotropin receptor antibody (TRAb) levels also correlate with increased risks, emphasizing the need for careful monitoring of pregnant women undergoing treatment for Graves' disease.
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Graves' disease has been reported to affect the clinical features of moyamoya disease (MMD), an occlusion of the circle of Willis. This study aimed to clarify the characteristics of MMD in patients with Graves' disease. This was a single-center, retrospective study.

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The severity of hyperthyroidism in Graves' disease (GD) has been reported to be worse in younger patients and to gradually improve with advancing age, accompanied by declining thyrotropin (TSH) receptor antibody (TRAb) values. This study was conducted to explore the extent to which the declining TRAb production may contribute to a decrease in severe hyperthyroidism with advancing age in patients with GD. This study was a cross-sectional analysis of retrospectively reviewed data.

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Although untreated Graves' disease (GD) is associated with a higher risk of cardiac complications and mortality, there is no well-established way to predict the onset of thyrotoxicosis in clinical practice. The aim of this study was to identify important variables that will make it possible to predict GD and thyrotoxicosis (GD + painless thyroiditis (PT)) by using a machine-learning-based model based on complete blood count and standard biochemistry profile data. We identified 19,335 newly diagnosed GD patients, 3,267 PT patients, and 4,159 subjects without any thyroid disease.

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Primary thyroid lymphoma (PTL) is known to develop mostly in patients with Hashimoto's thyroiditis (HT), and it is rare for it to develop in patients with Graves' disease (GD). The objective of this study was to investigate the clinical features, pathological findings, and long-term outcomes of PTL patients, grouped according to the presence of GD, HT, or no autoimmune thyroid disease (AITDs). The GD group was of major interest due to limited knowledge of the relationship with PTL.

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  • The study investigates how delayed follow-up visits during the COVID-19 pandemic impacted serum TSH levels in patients treated with levothyroxine, finding a correlation between delays and elevated TSH levels.
  • It analyzed data from over 25,000 patients in Japan who had either scheduled or delayed follow-up visits and considered factors like age, sex, and dosage of medication.
  • Results showed that delayed visits, especially those over 30 days, led to significantly higher risks of elevated TSH levels, indicating poorer control of thyroid disease during the pandemic.
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An asymptomatic, 68-year-old Japanese man visited our hospital for further examination of subclinical hypothyroidism. At the first visit, the serum TSH level was markedly elevated (36.6 μIU/mL), but the serum level of free T4 was within the reference interval.

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Background: Thyroid stimulating hormone receptor antibody (TRAb) is detected in the serum of patients with Graves' disease (GD). This study aims to investigate the prevalence of euthyroid individuals showing positive results for TRAb and to clarify the clinical course of thyroid function and TRAb levels in these subjects.

Objective: Subjects were female patients who newly visited our hospital for a screening test prior to fertility treatment and showed normal thyroid function and volume without nodules between 2014 and 2017.

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  • The study analyzed how sex, age, and genetic factors influence the prognosis of Graves' disease (GD), focusing on newly diagnosed patients from 2005 to 2019 and emphasizing remission rates and severity.
  • It included 21,633 patients (3954 males, 17,679 females) and found that males took longer to achieve remission compared to females, with a significant 41% higher hazard ratio for remission in females.
  • The research also revealed that severity of hyperthyroidism was higher in younger males, while both sexes showed improved remission rates with age; however, recurrence rates were not significantly tied to sex.
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  • The study examines the risk of birth defects in newborns from mothers with Graves disease treated with propylthiouracil (PTU) during the first trimester, amidst concerns about antithyroid drugs and their potential impact on fetal development.
  • An analysis of 1,913 cases from 2015-2019 found a birth defect incidence of 5.5% in the PTU group and 5.7% in a control group of untreated mothers, showing no significant differences.
  • The conclusions suggest that PTU treatment during the first trimester does not increase the likelihood of birth defects, providing reassurance for pregnant women with Graves disease.
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