Case #25

CT

• Heterogeneous attenuation pineal region mass with peripheral hyperattenuation and foci of calcification
• Associated downward mass effect on the tectum and cerebral aqueduct with resultant obstructive hydrocephalus

MRI

• Heterogeneously enhancing pineal region mass measuring 4 x 3.4 x 3 cm
• The mass is predominantly T1 hypointense and T2 hyperintense and demonstrates extensive susceptibility artifact along its periphery
• Mild adjacent parenchymal edema in the right thalamus
• Associated downward mass effect on the tectum and cerebral aqueduct with resultant obstructive hydrocephalus