Are Thyroid Functions Affected in Multisystem Inflammatory Syndrome in Children?

Area of Science:

• Pediatric Endocrinology
• Infectious Diseases
• Critical Care Medicine

Background:

• Multisystem inflammatory syndrome in children (MIS-C) is a serious condition associated with COVID-19.
• The endocrine system's role in MIS-C is not fully understood.
• Investigating thyroid function in MIS-C is crucial for understanding its impact on the hypothalamus-pituitary-thyroid axis.

Purpose of the Study:

• To evaluate thyroid function tests in pediatric MIS-C cases.
• To understand the effects of MIS-C on the hypothalamus-pituitary-thyroid axis.
• To examine the relationship between MIS-C disease severity and thyroid function.

Main Methods:

• A case-control study comparing 36 MIS-C cases with 72 healthy children.
• Data collected included demographic features, clinical findings, inflammatory markers, thyroid function tests, and thyroid antibody levels.
• Thyroid function tests were recorded for both MIS-C cases and controls.

Main Results:

• MIS-C cases showed significantly lower free triiodothyronine (fT3) levels compared to controls.
• Free thyroxine (fT4) levels were lower in MIS-C cases, though within normal ranges.
• Lower fT3 levels were observed in MIS-C patients requiring intensive care and those treated with steroids.

Conclusions:

• Low fT3 levels are associated with MIS-C diagnosis and the need for intensive care.
• Thyroid function evaluation may be beneficial in managing MIS-C.
• Further research is needed for prognosis prediction and long-term management of MIS-C.