A term newborn with dysmorphic features, pleural effusions, and juvenile myelomonocytic leukemia is most likely to have which underlying condition?

Correct Answer: C

Rationale: Noonan syndrome is associated with dysmorphic features, congenital pleural effusions, and an increased risk of juvenile myelomonocytic leukemia.

Correct Answer: D

Rationale: Gastric lavage is contraindicated in cases of altered consciousness, hydrocarbon ingestion, and caustic substances.

Correct Answer: A

Rationale: Hypoxia is the most common cause of non-cardiac neonatal arrhythmias, as it can lead to disturbances in the electrical conduction system of the heart, particularly in newborns with respiratory distress.

Correct Answer: D

Rationale: Gastric lavage is contraindicated in cases of altered consciousness, hydrocarbon ingestion, and caustic substances.

Correct Answer: D

Rationale: Diphasic stridor (occurring during both inspiration and expiration) suggests a more severe upper airway obstruction, commonly seen in severe laryngitis or subglottic stenosis.