The 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 predominantly downward gaze with marked eyelid retraction and convergence-retraction nystagmus. Ultrasound examination shows dilated lateral ventricles and a dilated 3rd ventricle. Further imaging studies reveal a solid mass in the pineal region. Which of the following is the most likely finding for this patient?
A. Normal lumbar puncture opening pressure
B. Stenotic intraventricular foramina
C. Dilated cisterna magna
D. Compression of periaqueductal gray matter
E. Hypertrophic arachnoid granulations