Muscle twitching and hypocalcemic episodes resulting in tetany

A 6-month-old infant is brought to the family practice clinic due to muscle twitching and hypocalcemic episodes resulting in tetany. Genetic studies have revealed a chromosome 22q11 deletion. What inquiry should the nurse practitioner make of the parents?

Does the child’s skin ever become yellow?

Is the child irritable?

How often has the child experienced infections?

Is constipation a problem?