A neonate is displaying mottled skin, has a large fontanel and tongue, is lethargic, and is having difficulty feeding. The nurse recognizes that this is most suggestive of which disorder?
A.
Hypoglycaemia
B.
Hypothyroidism
C.
Hypocalcaemia
D.
Phenylketonuria (PKU)
The correct answer and Explanation is :
The symptoms described—mottled skin, a large fontanel and tongue, lethargy, and difficulty feeding—are most suggestive of B. Hypothyroidism.
Explanation:
Hypothyroidism in neonates, also known as congenital hypothyroidism, is a condition where the thyroid gland does not produce enough thyroid hormones. This condition can have several characteristic symptoms:
- Mottled Skin: This can occur due to poor circulation and decreased metabolic activity associated with hypothyroidism.
- Large Fontanel: An enlarged fontanel (the soft spot on the baby’s head) can be a sign of hypothyroidism. This condition often leads to delayed closure of the fontanels.
- Enlarged Tongue: An enlarged (macroglossia) tongue is another possible sign of congenital hypothyroidism.
- Lethargy: Babies with hypothyroidism often exhibit decreased activity and lethargy due to the low levels of thyroid hormones affecting their overall energy levels.
- Difficulty Feeding: Hypothyroidism can lead to poor feeding due to general weakness and lethargy in the neonate.
Hypoglycemia (low blood sugar) and hypocalcemia (low calcium levels) can also cause symptoms in neonates, but they are less commonly associated with the specific combination of symptoms described. Phenylketonuria (PKU) is a metabolic disorder that typically presents with developmental delays and intellectual disabilities if not treated but does not typically cause the described symptoms early on.
Early detection and treatment of congenital hypothyroidism are crucial for normal growth and development. A thyroid function test will confirm the diagnosis, and prompt initiation of thyroid hormone replacement therapy is necessary to manage the condition and prevent long-term developmental issues.