Case #33

CT

• Cystic mass with a solid nodule along its lateral wall in the right frontoparietal region
• No corresponding calcification

MRI

• Large cystic mass in the right frontoparietal region measuring 6 x 5.7 x 4 cm
• Enhancing mural nodule along its lateral wall measuring up to 2.5 cm in craniocaudal span
• Wispy strands of enhancement extend from this nodule to the superior margin of the cyst
• Thin peripheral enhancement of the cystic component
• Incomplete internal signal suppression on FLAIR
• No corresponding restricted diffusion
• Mild surrounding vasogenic edema
• Associated mass effect with crowding of the atrium of the right lateral ventricle and 3 mm right-to-left midline shift
• No evidence of downward transtentorial herniation or hydrocephalus