Brain Tumors

Question 1

Ring-enhancing lesions on CT or MRI

Answer 1

DR. GATT:
Demyelinating lesions
Resolving hematoma
Granuloma
Abscess
Tumors (esp mets, GBM and CNS lymphoma)
Toxoplasmosis

Question 2

medulloblastoma

Answer 2

most common malignant primary brain tumor of childhood. arises from cerebellum. presents with increased ICP, ataxia or both. Contrast enhanced imaging of entire brain and spinal cord is indicated because it has a high tendency to metastasize to other parts of the CNS.

Question 3

meningioma

Answer 3

most common benign brain tumor. treatment is surgical for symptomatic lesions and observation for small asymptomatic lesions.

Question 4

primary cns lymphoma

Answer 4

increased frequency due to AIDS patients. can spread to the CSF, eye and bone. most commonly presents as change in mental status. treatment is chemo with or without radiation.

Question 5

acoustic neuroma

Answer 5

benign tumor presenting typically with unilateral hearing loss. can be bilateral in ppl with NF2.