system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A newborn of a mother with poor antenatal care is found to have a larger than normal head circumference with bulging fontanelles. Physical examination reveals a predominant downward gaze with marked eyelid retraction and convergence-retraction nystagmus. Ultrasound examination showed dilated lateral ventricles and a dilated third ventricle. Further imaging studies reveal a solid mass in the pineal region. Which of the following is the most likely finding for this patient?
assistant
Compression of periaqueductal grey matter