Transient Hypothyroxinemia of Prematurity

**Semantic type:** Disease or Syndrome

**Definition:** A common, self-limiting thyroid disorder seen in preterm infants that is characterized by abnormally low serum levels of thyroxine and free thyroxine with normal serum levels of thyroid stimulating hormone.

**Synonyms:** - Hypothyroxinemia of Prematurity - THOP - Transient Congenital Hypothyroidism