Question
What does a weakly positive TSH test in newborn foot blood screening mean? How is it treated and prevented?
Answer
A weakly positive TSH test in newborn foot blood screening refers to the situation where the test result for TSH (thyroid-stimulating hormone) shows a weakly positive reading during the screening process. This is typically used for an initial screening of congenital hypothyroidism. A definitive diagnosis requires further blood tests to assess the full thyroid function. For the diagnosis and treatment of congenital hypothyroidism in newborns, it should be completed within the first three months after birth. Delaying diagnosis and treatment beyond this time may affect the baby’s growth and development. Since your baby only shows a weakly positive result, it is recommended to undergo a retest and not to worry excessively.