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Nonthyroidal Illness Syndrome (NTIS, Sick Euthyroid Syndrome, Euthyroid Sick Syndrome, Low T3 Syndrome)

Specialty:

Endocrinology, Nutrition & Dermatology
Clinical Laboratory

Objective:

ICD-10:

Description:

Nonthyroidal Illness Syndrome (NTIS) refers to changes in thyroid hormone levels during serious systemic illness. It is also referred to as Sick Euthyroid Syndrome, Euthyroid Sick Syndrome or low T3 syndrome. It is important to recognize due to its prognostic implications and to avoid misinterpreting thyroid test findings.

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