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Subacute thyroiditis associated with COVID-19 infection: a report of an increasing entity

SUMMARY

In March 2020, the World Health Organization characterized COVID-19 as a pandemic. By May 2021, 37 cases of subacute thyroiditis (SAT) associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) had been reported in the literature. We report a patient diagnosed with SAT associated with COVID-19 and review the previously reported cases. A 31-year-old female with no significant previous history developed SAT 5 weeks after SARS-CoV-2 infection. She presented with anterior neck pain and fever. Thyroid function tests revealed hyperthyroidism with slightly increased inflammatory markers. Thyroid ultrasound showed diffuse hypoechoic left lobe and a hypoechoic area in the right lobe. On the fine-needle-aspiration biopsy, large histiocytes, disrupted and normal follicles, and multinucleated giant cells within colloid were seen. Under oral corticosteroid therapy, clinical progression was rapid. Seven weeks later, all thyroid function tests and inflammatory markers normalized. During the recent viral outbreak, clinicians should keep in mind the possibility of SAT after COVID-19, and patients with symptoms of SAT should be tested for SARS-CoV-2.

INTRODUCTION

In March 2020, the World Health Organization (WHO) characterized COVID-19 as a pandemic. In September 2020, the Endocrine Society published a statement online to alert endocrinologists about the association of SARS-CoV-2 infection and subacute thyroiditis (SAT) based on Brancatella and cols. (11 Brancatella A, Ricci D, Viola N, Sgrò D, Santini F, Latrofa F. Subacute thyroiditis after Sars-COV-2 infection. J Clin Endocrinol Metab. 2020;105(7):dgaa276.). By May 2021, more than 170 000 000 people were infected with SARS-CoV-2. In addition, 37 cases of SAT, a rare complication of SARS-CoV-2 infection, have been reported in the literature (Table 1) (22 Abreu R, Miguel R, Saieg M. Subacute (De Quervain) thyroiditis during the COVID-19 pandemic. Cancer Cytopathol. 2021 May 10. doi:10.1002/cncy.22449.
https://doi.org/10.1002/cncy.22449...

3 Álvarez Martín MC, Del Peso Gilsanz C, Hernández López A. Subacute De Quervain thyroiditis after SARS-CoV-2 infection. Endocrinol Diabetes Nutr (Engl Ed). 2020;68(10):754.

4 Asfuroglu Kalkan E, Ates I. A case of subacute thyroiditis associated with Covid-19 infection. J Endocrinol Invest. 2020;43(8):1173-4.

5 Brancatella A, Ricci D, Cappellani D, Viola N, Sgrò D, Santini F, et al. Is subacute thyroiditis an underestimated manifestation of SARS-CoV-2 infection? Insights from a case series. J Clin Endocrinol Metab. 2020;105(10):dgaa537.

6 Campos-Barrera E, Alvarez-Cisneros T, Davalos-Fuentes M. Subacute thyroiditis associated with Covid-19. Case Rep Endocrinol. 2020;2020:8891539.

7 Chakraborty U, Ghosh S, Chandra A, Ray AK. Subacute thyroiditis as a presenting manifestation of COVID-19: a report of an exceedingly rare clinical entity. BMJ Case Rep. 2020;13(12):e239953.

8 Chong WH, Shkolnik B, Saha B, Beegle S. Subacute Thyroiditis in the Setting of Coronavirus Disease 2019. Am J Med Sci. 2020:S0002-9629(20)30416-X.

9 Davoodi L, Oladi Z, Jafarpour H, Zakariaei Z, Soleymani E, Razavi A. A 33-year-old man with COVID-19 presented with subacute thyroiditis: a rare case report and literature review. New Microbes New Infect. 2021;41:100871.

10 Dworakowska D, Morley S, Mulholland N, Grossman AB. COVID-19-related thyroiditis: A novel disease entity? Clin Endocrinol (Oxf). 2021. doi:10.1111/cen.14453.
https://doi.org/10.1111/cen.14453...

11 Ippolito S, Dentali F, Tanda ML. SARS-CoV-2: a potential trigger for subacute thyroiditis? Insights from a case report. J Endocrinol Invest. 2020;43(8):1171-2.

12 Khatri A, Charlap E, Kim A. Subacute thyroiditis from COVID-19 infection: a case report and review of literature. Eur Thyroid J. 2021;9(6):324-8.

13 Mattar SAM, Koh SJQ, Rama Chandran S, Cherng BPZ. Subacute thyroiditis associated with COVID-19. BMJ Case Rep. 2020;13(8):e237336.

14 Mehmood MA, Bapna M, Arshad M. A case of post-COVID-19 subacute thyroiditis. Cureus. 2020;12(12):e12301.

15 Muller I, Cannavaro D, Dazzi D, Covelli D, Mantovani G, Muscatello A, et al. SARS-CoV-2-related atypical thyroiditis. Lancet Diabetes Endocrinol. 2020;8(9):739-41.

16 Ruano R, Zorzano-Martinez M, Campos A, Rius F, Hernández M. Subacute thyroiditis might be a complication triggered by SARS-CoV-2. Endocrinol Diabetes Nutr. 2020:S2530-0164(20)30206-8.

17 Ruggeri RM, Campennì A, Siracusa M, Frazzetto G, Gullo D. Subacute thyroiditis in a patient infected with SARS-COV-2: an endocrine complication linked to the COVID-19 pandemic. Hormones (Athens). 2020;16:1-3.

18 San Juan MDJ, Florencio MQV, Joven MH. Subacute thyroiditis in a patient with coronavirus diseases 2019. AACE Clin Case Rep. 2020;6(6):e361-4.

19 Seyed Resuli A, Bezgal M. Subacute thyroiditis in COVID-19 patients. Ear Nose Throat J. 2021:1455613211012114.
-2020 Sohrabpour S, Heidari F, Karimi E, Ansari R, Tajdini A, Heidari F. Subacute thyroiditis in COVID-19 patients. Eur Thyroid J. 2020;1-3.). On the other hand, it is also important to highlight, as declared in a position statement from the Thyroid Department of the Brazilian Society of Endocrinology and Metabolism, well-controlled hypo- and hyperthyroidism are not associated with an increased risk of COVID-19 infection or severity (2121 Martins JRM, Villagelin DGP, Carvalho GA, Vaisman F, Teixeira PFS, Scheffel RS, et al. Management of thyroid disorders during the COVID-19 outbreak: a position statement from the Thyroid Department of the Brazilian Society of Endocrinology and Metabolism (SBEM). Arch Endocrinol Metab. 2021:2359-3997000000352.).

Table 1
Clinical and biochemical features of the COVID-19 associated SAT cases and the present case

De Quervain thyroiditis is a known self-limited disease that occurs during or 4-6 weeks after an upper respiratory tract infection caused by several viruses such as influenza, adenovirus, Coxsackie, enterovirus, mumps, measles, Epstein-Barr, and cytomegalovirus, and SARS-CoV-2 appears to be a new emerging causal association (2323 Golden SH, Robinson KA, Saldanha I, Anton B, Ladenson PW. Clinical review: prevalence and incidence of endocrine and metabolic disorders in the United States: a comprehensive review. J Clin Endocrinol Metab. 2009;94(6):1853-78.). The incidence of SAT is 12.1 per 100 000/year, and it is more prevalent in females (19.1 per 100 000/year) than it is in males (4.4 per 100 000/year). The incidence was highest for people 30-40 years old (24 per 100 000/year) and 40-50 years old (35 per 100 000/year), declining with increasing age (2323 Golden SH, Robinson KA, Saldanha I, Anton B, Ladenson PW. Clinical review: prevalence and incidence of endocrine and metabolic disorders in the United States: a comprehensive review. J Clin Endocrinol Metab. 2009;94(6):1853-78.). An association between SAT and HLA-B*35, -B*18:01, -DRB1*01, and -C*04:01 is known, and it might mean that SAT occurs in genetically predisposed people through a susceptibility to viral infections (2424 Kramer AB, Roozendaal C, Dullaart RP. Familial occurrence of subacute thyroiditis associated with human leukocyte antigen-B35. Thyroid. 2004;14(7):544-7.

25 Stasiak M, Lewiński A. New aspects in the pathogenesis and management of subacute thyroiditis. Rev Endocr Metab Disord. 2021:1-13.
-2626 Stasiak M, Tymoniuk B, Stasiak B, Lewiński A. The Risk of Recurrence of Subacute Thyroiditis Is HLA-Dependent. Int J Mol Sci. 2019;20(5):1089.). It is mainly characterized by a sudden onset of neck pain radiated to the jaw, tenderness, fever, myalgia, and fatigue with the characteristic hyperthyreotic symptoms: palpitation, tremor, diarrhea, and weight-loss (2727 Hennessey JV. Subacute thyroiditis. In: Feingold KR, Anawalt B, Boyce A, Chrousos G, de Herder WW, Dungan K, et al., editors. Endotext. MDText.com; 2018.). The laboratory findings include elevation of erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), high free thyroxine (FT4) and free triiodothyronine (FT3), and suppressed thyroid-stimulating hormone (TSH) in the initial phase without elevation of thyroid autoantibodies (antithyroid peroxidase [TPOAb] and antithyroglobulin [TgAb]). Ultrasound shows normal or slightly enlarged thyroid with focally or diffusely hypoechogenic pattern and low vascularization on color Doppler. Thyroid scintigraphy typically reveals depressed or absent radionuclid uptake. On FNAB cytology multiple multinuclear giant cells with cytoplasm, a dirty background of cellular debris, degenerated-proliferated follicular epithelium cells, rare epithelioid granulomas, and mixed type inflammatory cells are characteristic (2828 Vural Ç, Paksoy N, Gök ND, Yazal K. Subacute granulomatous (De Quervain's) thyroiditis: fine-needle aspiration cytology and ultrasonographic characteristics of 21 cases. Cytojournal. 2015;12:9.). In some patients, no treatment is required or nonsteroidal anti-inflammatory drugs (NSAIDs) are enough for relief of pain. If the symptoms do not improve, steroid should be administered with daily doses of 20-40 mg prednisone for 2 weeks, which should be tapered down in a period of 6 weeks. In the case of palpitation, beta-blocking agents might be used. Antithyroid drugs that block the synthesis of thyroid hormones are not needed because the excess of thyroid hormones results from the release of preformed thyroid hormones from the inflamed thyroid tissue and not from increased synthesis of thyroid hormones. Subsequently, patients often experience hypothyroidism before returning to euthyroidism. In these cases, transient levothyroxin administration might be needed.

CASE REPORT

A 31-year-old-woman had symptoms of suspected COVID-19, and on October 2 2020, the reverse transcription-polymerase chain reaction (PCR) for SARS-CoV-2 using nasopharyngeal and oropharyngeal swabs turned out positive. She had 2 days of fever (39.5 °C), severe headache, myalgia, and sleepiness. These symptoms resolved without any medication, and afterwards she had a 10-day-long loss of taste and smell. On October 12, she was completely asymptomatic, but the PCR test remained positive. According to the Hungarian National Guidance, as a health care worker, she went back to work after 3 weeks of disease onset and no further swab tests were performed.

On 4 November, after 5 weeks of COVID-19 onset, she developed severe neck pain and tenderness that radiated to the jaw, and a few days later, she experienced fever (38.7 °C), fatigue, myalgia, palpitation, and tremor. Past medical history was unremarkable for thyroid and any other diseases. On 10 November, laboratory test showed high levels of both FT4 1.60 ng/dL (normal range: 0.70-1.48 ng/dL) and FT3 4.10 pg/mL (normal range: 1.71-3.71 pg/mL), low level of TSH 0.046 uIU/mL (normal range: 0.350-4.940 uIU/mL), moderately emerged inflammatory markers (CRP 16.9 mg/L; normal: <10 mg/L), ESR 34 mm/h (normal range: 6-11 mm/h) with normal leukocyte counts and platelets (Table 1). Antibodies (TPOAb and TgAb) were negative. On neck ultrasound, both thyroid lobes had normal size (left lobe 20 × 17 × 39 mm, right lobe 17 × 14 × 43 mm) with normal vascularization. The left lobe was diffuse hypoechoic (Figure 1), and in the right lobe, a 15 × 8 × 7 mm hypoechoic area was detected with slurred border (Figure 2). There was no cervical lymphadenopathy.

Figure 1
Thyroid ultrasound: diffuse hypoechoic left thyroid lobe.
Figure 2
Thyroid ultrasound: in the right thyroid lobe, a 15 × 8 × 7 mm hypoechoic lesion is seen.

Because of the lesion in the right lobe, FNAB was performed on 18 November. On the aspiration cytology, large histiocytes, disrupted and normal follicles, and multinucleated giant cells within colloid were seen (Figure 3). The diagnosis of SAT was confirmed. She began NSAID therapy but the symptoms did not improve. She consulted an endocrinologist and began methylprednisolone (32 mg/day for 2 weeks, which was tapered down in 6 weeks). Neck pain and fever disappeared within a day, the other symptoms within 2 weeks. On 24 November, all the inflammatory markers were in a normal range: CRP was 0.1 mg/L and ESR was 7 mm/h. FT4 and FT3 became normal, and TSH was yet suppressed: TSH: 0.019 uIU/mL; FT4: 1.29 ng/dL; and FT3: 3.11 pg/mL. On 26 November, the SARS-CoV-2 IgA, IgM, and IgG were still positive: 18.19 COI. At the last evaluation, on 23 December, she was taking 4 mg/day methyprednisolone and thyroid function tests were in normal range: TSH: 2.558 uIU/mL; FT4: 0.88 ng/dL; and FT3: 2.36 pg/mL.

Figure 3
FNAB: small splashes of colloid can be seen with normal-looking follicular cells and 1 multinuclear giant cell.

DISCUSSION

Although the effect of SARS-CoV-2 virus on the thyroid gland has not yet been fully explored, there are currently four possible hypotheses of the pathogenesis of thyroid dysfunction after COVID-19: (i) direct infection of the thyroid gland by SARS-CoV-2; (ii) underlying nonthyroideal illness syndrome; (iii) dysfunction of the hypothalamic-pituitary-thyroid (HPT) axis causing a diminished level of serum TSH; and (iv) the indirect effects of immune-mediated, postviral inflammatory reaction (2929 Chen W, Tian Y, Li Z, Zhu J, Wei T, Lei J. Potential interaction between SARS-CoV-2 and thyroid: a review. Endocrinology. 2021:bqab004.). During the recent outbreak, Muller and cols. (1515 Muller I, Cannavaro D, Dazzi D, Covelli D, Mantovani G, Muscatello A, et al. SARS-CoV-2-related atypical thyroiditis. Lancet Diabetes Endocrinol. 2020;8(9):739-41.) reported that angiotensin-converting enzyme 2 (ACE2) receptors, where the SARS-CoV-2 virus binds, are more highly expressed in thyroid cells, than in lung cells. Rotondi and cols. (3030 Rotondi M, Coperchini F, Ricci G, Denegri M, Croce L, Ngnitejeu ST, et al. Detection of SARS-COV-2 receptor ACE-2 mRNA in thyroid cells: a clue for COVID-19-related subacute thyroiditis. J Endocrinol Invest. 2020:1-6.). examined 15 patients who underwent thyreoidectomy for benign thyroid nodules and detected ACE2 mRNA in all thyroid samples, which was the first direct proof for the expression of this potential target for SARS-CoV-2 entry.

Interestingly, in patients with severe COVID-19, an increased prevalence of a new phenomenon, thyrotoxicosis secondary to inflammatory or destructive thyroiditis, was observed (3131 Caron P. Thyroiditis and SARS-CoV-2 pandemic: a review. Endocrine. 2021:1-6. doi: 10.1007/s12020-021-02689-y.
https://doi.org/10.1007/s12020-021-02689...
). This is an atypical SAT course noticed especially in hospitalized patients. Lania and cols. (3232 Lania A, Sandri MT, Cellini M, Mirani M, Lavezzi E, Mazziotti G. Thyrotoxicosis in patients with COVID-19: the THYRCOV study. Eur J Endocrinol. 2020;183(4):381-7.) retrospectively reported in the THYRCOV study that 20.2% of patients hospitalized for severe COVID-19 presented clinical or subclinical thyrotoxicosis. They suggested that thyrotoxicosis is due to inflammatory or destructive thyroiditis secondary to cytokine storm, because the prevalence of thyrotoxicosis correlated with the concentration of interleukin 6. Muller and cols. (1515 Muller I, Cannavaro D, Dazzi D, Covelli D, Mantovani G, Muscatello A, et al. SARS-CoV-2-related atypical thyroiditis. Lancet Diabetes Endocrinol. 2020;8(9):739-41.) also reported increased number of thyrotoxicosis in COVID-19 patients hospitalized in 2020 in high-intensity care units (HICU-20) compared with COVID-19 patients hospitalized in low-intensity care units (LHICU-20) and with patients admitted to the same high-intensity care unit in 2019, before the pandemic (HICU-19). In the HICU-20 group, 15% of patients had thyrotoxicity, and in the HICU-19 and LHICU-20 groups, thyrotoxicity was found in only 1% and 2% of patients, respectively. The patients of the HICU-20 group had significantly lower TSH levels than patients in the LHICU-20 and HICU-19 groups did, and T4 concentrations were significantly higher in the HICU-20 group compared with the LHICU-20 group. In these cases, the lack of neck pain was also noticed. The absence of infiltration due to the SARS-CoV-2-related leukopenia can lead to the lack of tension in the thyroid capsule, which might explain the nonpainful nature of inflammatory or destructive thyroiditis (3131 Caron P. Thyroiditis and SARS-CoV-2 pandemic: a review. Endocrine. 2021:1-6. doi: 10.1007/s12020-021-02689-y.
https://doi.org/10.1007/s12020-021-02689...
).

In the previous coronavirus epidemic that began in 2002, alteration of serum levels of thyroid hormones and TSH was also detected, but there was little evidence of the effects of SARS-CoV-1 on thyroid gland. Only a few histopathological specimens of the thyroid gland were reported. A study by Wei and cols. (3333 Wei L, Sun S, Xu CH, Zhang J, Xu Y, Zhu H, et al. Pathology of the thyroid in severe acute respiratory syndrome. Hum Pathol. 2007;38(1):95-102.) involving five autopsies of SARS-CoV-1 patients concluded that apoptosis might have played a role in the effect of SARS on thyroid gland. In this context, the increase of proinflammatory cytokines during an acute SARS-CoV-2 infection might be associated with the destructive thyroiditis and thyrotoxicosis.

By May 2021, 37 cases of SARS-CoV-2-associated SAT had been published, and data from these reports are summarized in Table 1 and 2. The past medical history was negative for thyroid diseases in 36 cases; 1 patient had a small, nontoxic, diffuse goiter. It shows that underlying thyroid condition is not a risk factor for SAT. Young and middle-aged female predominance was characteristic as in other cases of SAT. Female-to-male ratio was 3.6:1 (29 females, 8 males), average age 38.5 (range 18 to 69; Table 1). SAT symptoms can copresent with a positive SARS-CoV-2 PCR or even co-occur with the symptoms of COVID-19, which has never been described before in cases of the previously mentioned SAT-causing viruses (33 Álvarez Martín MC, Del Peso Gilsanz C, Hernández López A. Subacute De Quervain thyroiditis after SARS-CoV-2 infection. Endocrinol Diabetes Nutr (Engl Ed). 2020;68(10):754.,44 Asfuroglu Kalkan E, Ates I. A case of subacute thyroiditis associated with Covid-19 infection. J Endocrinol Invest. 2020;43(8):1173-4.,77 Chakraborty U, Ghosh S, Chandra A, Ray AK. Subacute thyroiditis as a presenting manifestation of COVID-19: a report of an exceedingly rare clinical entity. BMJ Case Rep. 2020;13(12):e239953.,99 Davoodi L, Oladi Z, Jafarpour H, Zakariaei Z, Soleymani E, Razavi A. A 33-year-old man with COVID-19 presented with subacute thyroiditis: a rare case report and literature review. New Microbes New Infect. 2021;41:100871.,1111 Ippolito S, Dentali F, Tanda ML. SARS-CoV-2: a potential trigger for subacute thyroiditis? Insights from a case report. J Endocrinol Invest. 2020;43(8):1171-2.,1313 Mattar SAM, Koh SJQ, Rama Chandran S, Cherng BPZ. Subacute thyroiditis associated with COVID-19. BMJ Case Rep. 2020;13(8):e237336.,1515 Muller I, Cannavaro D, Dazzi D, Covelli D, Mantovani G, Muscatello A, et al. SARS-CoV-2-related atypical thyroiditis. Lancet Diabetes Endocrinol. 2020;8(9):739-41.,1818 San Juan MDJ, Florencio MQV, Joven MH. Subacute thyroiditis in a patient with coronavirus diseases 2019. AACE Clin Case Rep. 2020;6(6):e361-4.,1919 Seyed Resuli A, Bezgal M. Subacute thyroiditis in COVID-19 patients. Ear Nose Throat J. 2021:1455613211012114.). The longest period from COVID-19 infection to SAT onset was 49 days. In all of these cases, the clinical course of COVID-19 was asymptomatic or mild, in contrast with destructive thyroiditis. The main presenting symptoms were neck pain radiated to the jaw, thyroid tenderness, and fever, but the number of cases of painless SAT course is increasing. Taking this into account, pain of the thyroid gland is not included in the main diagnostic criteria of SAT reported by Stasiak and Lewiński (2525 Stasiak M, Lewiński A. New aspects in the pathogenesis and management of subacute thyroiditis. Rev Endocr Metab Disord. 2021:1-13.). The characteristic hyperthyreotic symptoms (palpitation, sweating, insomnia, weight-loss, and atrial fibrillation) were also reported. Thyroid function tests were typical: increased thyroid hormones and inflammatory markers as well as decreased TSH were revealed. TSH receptor antibodies were undetectable in all cases. At neck ultrasound, the thyroid was usually enlarged bilaterally with diffuse hypoechoic areas, and low vascularization at color Doppler ultrasonography was characteristic as well. 99mTechnetium scintiscan showed absent uptake. In most of the cases, steroids and NSAIDs were applied. After beginning of the treatment, symptoms disappeared within a few days. Several weeks after the onset of SAT, all patients’ inflammatory markers were within normal range. In a long-term follow-up, 24 patients were euthyroid, 7 patients were diagnosed with hypothyroidism, and 1 patient still had hyperthyroidism (Table 2).

Table 2
Variation of thyroid function in the COVID-19 associated SAT cases described

In our case, the age and the gender were typical for SAT. The patient presented with SAT symptoms after 5 weeks of COVID disease onset, which is also an average time. Clinically, neck pain and fever were the main presenting symptoms. In the acute phase, the characteristic laboratory markers were observed: a marked elevation of inflammatory markers and primary hyperthyroidism. At neck ultrasound, the thyroid size and the vascularization were normal, which is uncommon in SAT. One possible explanation is that ultrasonography was performed relatively early after the symptom onset. Due to the hypoechoic area with slurred border detected in the right lobe, an urgent FNAB was advised to rule out malignancy. To date, this is the fourth case of SARS-CoV-2-associated SAT where FNAB was taken. In our case, large histiocytes, disrupted and normal follicles, and multinucleated giant cells within colloid were observed (Figure 3). Abreu and cols. (22 Abreu R, Miguel R, Saieg M. Subacute (De Quervain) thyroiditis during the COVID-19 pandemic. Cancer Cytopathol. 2021 May 10. doi:10.1002/cncy.22449.
https://doi.org/10.1002/cncy.22449...
) reported 3 cases of SAT where FNAB was taken. All 3 cytological pictures were very similar; they all showed clusters of epitheloid histiocytes forming loose granulomas and scattered giant cells amid rare inflammatory and follicular cells, similar to our specimen. Because of the definitive diagnosis of SAT according to the FNAB findings, radionuclide thyroid scanning was not performed on our patient. Under oral corticosteroid therapy, a rapid clinical progression was observed. In a long-term follow-up, after 7 weeks of SAT onset, the patient was euthyroid, as were the majority of the previously reported cases.

During the currently ongoing pandemic, SARS-CoV-2 must be thought of as an etiological agent of De Quervain thyroiditis, and thyroid citology would be advisable for the better understanding of the effects of SARS-CoV-2 on thyroid gland.

In summary, we presented a case report of SAT associated with SARS-CoV-2 and the fourth case in which FNAB was performed. In this article, we also summarized the previously reported SAT cases associated with SARS-CoV-2.

In conclusion, we would like to emphasize that during the recent viral outbreak, clinicians should keep in mind the possibility of SAT after COVID-19. According to the high prevalence of asymptomatic COVID-19 cases, during the ongoing COVID-19 pandemic, patients presenting with SAT should be tested for SARS-CoV-2 serology or PCR. We would like to advise further research to understand the possible genetic predilections and histopathological changes of SARS-CoV-2 associated with SAT.

  • Statements: the manuscript has been submitted solely to this journal and is not published in press, or submitted elsewhere.
  • Statement of ethics: the patient has given written informed consent to publish this case, including the publication of images.
  • Funding sources: the authors received no financial support for the research, authorship, or publication of this article.

Acknowledgement:

the authors would like to express thanks to Eszter Székely MD for the aspiration cytology findings and Emese Juhász MD for the ultrasound images.

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    San Juan MDJ, Florencio MQV, Joven MH. Subacute thyroiditis in a patient with coronavirus diseases 2019. AACE Clin Case Rep. 2020;6(6):e361-4.
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    Seyed Resuli A, Bezgal M. Subacute thyroiditis in COVID-19 patients. Ear Nose Throat J. 2021:1455613211012114.
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    Sohrabpour S, Heidari F, Karimi E, Ansari R, Tajdini A, Heidari F. Subacute thyroiditis in COVID-19 patients. Eur Thyroid J. 2020;1-3.
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    Kramer AB, Roozendaal C, Dullaart RP. Familial occurrence of subacute thyroiditis associated with human leukocyte antigen-B35. Thyroid. 2004;14(7):544-7.
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    Stasiak M, Lewiński A. New aspects in the pathogenesis and management of subacute thyroiditis. Rev Endocr Metab Disord. 2021:1-13.
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Publication Dates

  • Publication in this collection
    16 Mar 2022
  • Date of issue
    Jan-Feb 2022

History

  • Received
    04 July 2021
  • Accepted
    03 Nov 2021
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