A neonate screen shows low T4 and elevated TSH. The recommended course of action is to:

A neonate screen shows low T4 and elevated TSH. The recommended course of action is to:

• A. Discharge the neonate, and schedule a follow-up visit in 1 week
• B. Begin the neonate on thyroxine based on the test results
• C. Examine the neonate for signs of hypothyroidism
• D. Consult with the physician, and repeat the tests

Answer: (D)

Management of abnormal newborn thyroid screening results. When a neonate screen shows a low T4 with an elevated TSH, this pattern strongly suggests congenital hypothyroidism and requires careful confirmation and physician coordination rather than immediate treatment or discharge. The appropriate next step is to involve the physician and obtain confirmatory testing, such as a repeat screen and diagnostic serum studies (TSH and free T4). This confirms whether the abnormal result reflects true hypothyroidism or a transient/technical issue, guiding correct management. Starting levothyroxine without confirmation can lead to unnecessary treatment or missed steps if the result isn’t truly hypothyroid, while simply examining for signs isn’t sufficient because many infants lack obvious clinical features at birth. Therefore, consult with the physician and repeat the tests to establish an accurate diagnosis and timely treatment plan if indicated.

Management of abnormal newborn thyroid screening results. When a neonate screen shows a low T4 with an elevated TSH, this pattern strongly suggests congenital hypothyroidism and requires careful confirmation and physician coordination rather than immediate treatment or discharge. The appropriate next step is to involve the physician and obtain confirmatory testing, such as a repeat screen and diagnostic serum studies (TSH and free T4). This confirms whether the abnormal result reflects true hypothyroidism or a transient/technical issue, guiding correct management. Starting levothyroxine without confirmation can lead to unnecessary treatment or missed steps if the result isn’t truly hypothyroid, while simply examining for signs isn’t sufficient because many infants lack obvious clinical features at birth. Therefore, consult with the physician and repeat the tests to establish an accurate diagnosis and timely treatment plan if indicated.