Related Experiment Video
Updated: Apr 7, 2026

04:39
Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
Published on: March 17, 2023
2.7K
A Comparative Analysis of Subacute Thyroiditis: Before and After COVID-19
Muhammad Z Shrayyef1, Rayan Ahmad2, Brittney Legere3
1Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
AACE Endocrinology and Diabetes
|April 6, 2026
Summary
COVID-19 did not change Subacute Thyroiditis (SAT) incidence, but increased its severity. Post-pandemic, patients experienced higher thyroid hormone levels during hyperthyroidism and elevated TSH during hypothyroidism.
Area of Science:
- Endocrinology
- Infectious Diseases
- Thyroidology
Background:
- COVID-19 infection affects endocrine function, with reported thyroid disorders.
- Subacute thyroiditis (SAT), an inflammatory thyroid condition, is linked to viral infections.
- Previous studies suggest a connection between COVID-19 and SAT.
Purpose of the Study:
- To compare the severity of Subacute Thyroiditis (SAT) before and after the COVID-19 pandemic.
- To analyze differences in SAT patient characteristics and laboratory values pre- and post-COVID-19.
Main Methods:
- Retrospective cohort study of SAT cases from an endocrinology clinic.
- Cases categorized as pre-Covid (Dec 2015-Apr 2019) and post-Covid (Dec 2019-Apr 2023).
- Analysis of thyroid-stimulating hormone (TSH), free thyroxine (FT4), and free triiodothyronine (FT3) levels.
Main Results:
- No significant difference in SAT incidence was observed between pre- and post-Covid periods.
- Post-Covid cohort showed increased SAT severity, with higher FT4 and FT3 levels during hyperthyroidism (P=0.05, P=0.02).
- The post-Covid hypothyroid phase exhibited significantly higher TSH (P=0.0046) and lower FT4 values (P=0.001).
Conclusions:
- Subacute Thyroiditis (SAT) incidence remained stable despite the COVID-19 pandemic.
- The severity of SAT disease course significantly increased following the COVID-19 pandemic onset.
- Elevated thyroid hormone levels during hyperthyroidism and higher TSH during hypothyroidism characterize the post-Covid SAT cohort.
Related Concept Videos
Acute Pharyngitis
6.0K
Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
6.0K
Myocarditis II: Clinical Features and Diagnostic Tests
446
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
446
Tonsillitis I: Introduction
3.4K
Tonsillitis is inflammation of the tonsils, which are two lymphoid tissue masses at the back of the throat. This condition can cause discomfort and irritation in the throat.
Etiology
Three primary contributing factors have been identified.
Etiology
Three primary contributing factors have been identified.
3.4K
Tonsillitis II: Management
586
This lesson will focus on the different treatment options for managing tonsillitis, which typically depend on the cause and severity.
586
Myocarditis III: Medical Management
324
Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
324
The Thyroid Gland
8.8K
The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
8.8K
