A 28-week premature infant presents on day 2 of life with seizures, a bulging anterior fontanelle, and recurrent apneic episodes. Vital signs show HR 165 bpm, RR 48/min, BP 45/28 mmHg, and temperature 36.8°C. Cranial ultrasound demonstrates intraventricular hemorrhage with blood layering dependently within the lateral ventricles. The infant has received no prior medications. There is no evidence of meningitis on clinical examination. Which anatomical structure is the most likely source of this hemorrhage?
- A)Germinal matrix in the subventricular zoneGABARITO
- B)Choroid plexus papilloma
- C)Middle meningeal artery
- D)Bridging veins
- E)Superior sagittal sinus
Explicação
Germinal matrix in the subventricular zone is the correct answer because neonatal intraventricular hemorrhage in premature infants originates from this highly vascular but structurally fragile region with poor autoregulation. Ver explicação completa e trilha adaptativa →