Which is a bright red, rubbery nodule with a rough surface and a well-defined margin that may be present at birth?

Correct Answer: D

Rationale: A strawberry hemangioma, also known as an infantile hemangioma, is a bright red, rubbery nodule with a rough surface and a well-defined margin that may be present at birth or appear shortly after. This common type of benign vascular tumor occurs on the skin and typically grows rapidly during the first few months of life before eventually shrinking and disappearing by early childhood. It is composed of an overgrowth of blood vessels and is considered a benign condition that generally does not require treatment unless it interferes with vision, breathing, or other essential functions.

Correct Answer: C

Rationale: When a preschool child is hospitalized without adequate preparation, they may often react to the hospitalization by regressing. This means that the child may revert back to behaviors that they had previously outgrown, such as bedwetting or wanting a bottle. Hospitalization can be a stressful and overwhelming experience for young children, causing them to seek comfort in familiar behaviors from earlier stages of development. This regression can provide a sense of security and control during a time of uncertainty and unfamiliar circumstances. It is important for parents, caregivers, and healthcare providers to be aware of this potential reaction and provide appropriate support and reassurance to help the child cope with the hospitalization.

Correct Answer: B

Rationale: The best indicator for extubation readiness is a low FiO2 (fraction of inspired oxygen) because it indicates the infant is maintaining adequate oxygenation with minimal support.

Correct Answer: B

Rationale: If initial skin testing is negative but the clinical history strongly suggests venom allergy, repeating the skin test after 4-6 weeks increases the likelihood of detecting sensitization.

Correct Answer: D

Rationale: Choanal atresia is a congenital nasal obstruction that causes cyanosis that worsens with feeding and improves with crying, since crying opens the mouth for breathing. Bilateral atresia requires urgent intervention.