CNS and Ventricles

Question 1

Glioblastoma features

Answer 1

Most common primary brain tumor

Highly malignant

GFAP +

Question 2

Glioblastoma patho

Answer 2

Can cross midline (butterfly glioma)

Pseudopalisading necrosis: area of necrosis surrounded by rows of neoplastic cells

Question 3

Astrocytoma features

Answer 3

Benign tumor of children and YA

GFAP +

Usually in Posterior Fossa

Question 4

Astrocytoma patho

Answer 4

Rosenthal fibers

Question 5

Oligodendroglioma features

Answer 5

Slow growing with long Pt. survival

Question 6

Oligodendroglioma appearance

Answer 6

Fried-egg: perinuclear halo

Question 7

Ependymoma patho

Answer 7

Rosette and pseduorosettes

Question 8

What is a Primitive Neuroectodermal Tumor (PNET)

Answer 8

Medulloblastoma

Question 9

Medulloblastoma patho

Answer 9

Blue, small, round cells with pseudorosettes

Question 10

Meningioma patho

Answer 10

Attaches to the dura, compresses underlying brain without invasion

Psammoma bodies

Question 11

Schwannoma features

Answer 11

Most frequent location: CN 8 at cerebellopontine angle

Causes Hearing loss, tinnitus and CN 5 and 8 signs

Question 12

Bilateral acoustic schwannomas is pathognomonic for

Answer 12

Neurofibromatosis type 2

Question 13

Lat Ventricle and 3rd ventricle are connected via

Answer 13

Foramen of Monro

Question 14

Third ventricle and fourth ventricle connected via

Answer 14

Cerebral aqueduct of Sylvius

Question 15

Noncommunicating hydrocephalus commonly occurs

Answer 15

In narrow points:

Foramen of Monro

Cerebral aqueduct openings of fourth ventricle