Medical MCQ-A 15-year-old boy complains of right-sided weakness and gait impairment. A CT scan shows a large, non-enhancing cyst in the posterior cranial fossa, with an enhancing tumor nodule in the left cerebellum. What is the most likely diagnosis?

A 15-year-old boy complains of right-sided weakness and gait impairment. A CT scan shows a large, non-enhancing cyst in the posterior cranial fossa, with an enhancing tumor nodule in the left cerebellum. What is the most likely diagnosis?

An arachnoid cyst

A cystic astrocytoma

Rathke's cleft cyst

Glioblastoma multiforme

Question Category:

Surgery

Correct Answer:

A cystic astrocytoma

Description:

Cystic astrocytoma's are neoplasms of the CNS. They usually consist of a large, non-enhancing cyst on the wall of which is an enhancing tumor nodule. They are most commonly found within the substance of the cerebellar hemispheres of children and young adults. A Rathke's cleft cyst is a remnant of the embryologic Rathke's pouch. These are found within the sella turcica.

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