CNS3

Question 1

Most common brain tumors affecting chiasmal area

Answer 1

Pituitary adenoma
Craniopharyngioma
Meningioma

Question 2

Most important risk factor that forms CNS tumors

Answer 2

Ionizing radiation even @ low doses

CT brain scan

Question 3

Todd’s phenomenon

Answer 3

Postictatal paresis/ paralysis after seizure

Type of focal symptom

Question 4

Diagnosis of CNS tumors

Answer 4

MRI with contrast (gadolinium)

Question 5

Glioblastoma multiforme is the most common____.

Answer 5

Malignant astrocytoma

Question 6

Butterfly lesion

Answer 6

Glioblastoma multiforme

Question 7

Malignant astrocytoma

Answer 7

Glioblastoma multiforme

Butterfly lesion: ring surrounded by edema

Question 8

Children= 5 yrs
Comes from primitive glia within lining of ventricular system
Increases in ICP

Answer 8

Ependymomas

Question 9

Spinal cord Glioma

Answer 9

Adult Ependymomas

Question 10

Oligodendroglioma effect on ICP

Answer 10

Rare

Question 11

Malignant invasive embryo all tumor in cerebellum

Answer 11

Medulloblastoma

Question 12

Oligodendroglioma

Answer 12

Focal symptoms : focal cerebral dysfunction, seizures

Rarely effects ICP

Good prognosis, sensitive to chemo

Question 13

Arise from lining of ventricular system = affects CSF-> increase ICP symptoms

Most common location is spinal cord

Answer 13

Ependymomas

Question 14

What are the different types of gliomas?

Answer 14

Astrocytomas
Oligodendroglioma
Ependymomas

Question 15

Malignant cerebellar tumor of childhood

Answer 15

Medulloblastoma

Question 16

Nerve sheath tumors

Answer 16

Schwannoma

Neurofibromas

Question 17

Medulloblastoma

Answer 17

Malignant embryonal tumor of cerebellum occurs primarily in children

Mostly in VERMIS

INCREASED ICP

Bad prognosis, sensitive to radiation

Question 18

Choroid plexus papilloma

Answer 18

Gland producing lots of CSF -> causes hydrocephalus

Benign

Location: ventricles

Question 19

Germinoma

Answer 19

Parinaud syndrome (fixed upward gaze)

Pineal region

Hydrocephalus due to aqueduct allergies stenosis
Endocrine abnormalities
Increase ICP

Question 20

Arise from arachnoid cap cell type from the arachnoid membrane

Answer 20

Meningioma

Question 21

Meningioma

Answer 21

Benign 
Arise from arachnoid cap 
Associated w NF-2 
No edema 
MRI will show adjacent to bone & have dura tail 
Psammoma  bodies

Question 22

Dura tail seen on MRI

Answer 22

Meningioma

Question 23

Psammoma bodies are seen where?

Answer 23

Meningioma

Question 24

Junctional scotoma

Answer 24

Meningioma

Question 25

Cerebellar pontine angle tumor

Answer 25

Schwannoma

Question 26

Schwannoma

Answer 26

Cerebellopontine angle NF-2 Asymmetric sensory neuronal hearing loss tinnitus CNVIII vestibular division

Question 27

Sensorineural hearing loss, tinnitus is seen in which tumor?

Answer 27

Schwannoma CNVIII vestibular division | Cerebellopontine angle

Question 28

Neurofibroma

Answer 28

Can be formed at any place along a nerve Schwann, fibroblast, mast cells, vascular 3 types: cutaneous, subcutaneous, plexi form

Question 29

Primary CNS lymphoma

Answer 29

Rare brain tumor associated to immune suppressants (HIV) -non Hodgkin’s B cell lymphoma Bad prognosis Lymphomatous uveitis

Question 30

Tumor associated with non Hodgkin’s B cell neoplasm

Answer 30

Primary CNS lymphoma

Question 31

Risk factor of metastatic tumors of CNS

Answer 31

Chemo, since it weakens the BBB and allows diseases to get to CNS

Question 32

Most common origin of metastatic tumors of CNS

Answer 32

Lungs

Question 33

Comes from epithelial remnants of rathkes pouch

Answer 33

Craniopharyngioma (where pituitary is located) Can cause hypopituitarism in kids Reoccurs if removed Ascending progression of bitemp. Hemianopsia since posterior crossing fibers are affected

Question 34

Ascending progression of bitemporal hemianopsia

Answer 34

Craniopharyngioma