images VII

Question 1

Answer 1

Bilateral optic nerve astrocytoma in a patient with NF1. Note thickening of the optic nerves.

Question 2

Answer 2

Astrocytoma of the optic nerve.

Question 3

Answer 3

Meningioma

Question 4

Answer 4

Meningioma

Question 5

Answer 5

Meningiomas can be seen to invade bone and even muscle…does not mean it is malignant

Question 6

Answer 6

meningioma

Multiple in NF2 and post radiation

Question 7

Answer 7

meningioma

Multiple in NF2 and post radiation

Question 8

Answer 8

Meningioma

Question 9

Answer 9

Meningioma

Question 10

Answer 10

Meningioma

Question 11

Answer 11

meningioma

Dark spots is speckled calcifications

Question 12

Answer 12

meningioma

tumor cells are arranged in whorls with hyalinized and calcified centers that are called psammoma bodies

Question 13

Answer 13

Pilocytic Astrocytoma, WHO I

Question 14

Answer 14

Pilocytic Astrocytoma, WHO I

Question 15

Answer 15

Pilocytic Astrocytoma, WHO I

Question 16

Answer 16

Pilocytic Astrocytoma, WHO I

Solid tumor w/in cyst- surgeon can trust margins, if it does recur usually just cystic component

Kids still have significant sequelle from surgery and large portion being removed

Question 17

Answer 17

Pilocytic Astrocytoma, WHO I

Question 18

Answer 18

Diffuse Astrocytoma, WHO II

cannot determine grade from imaging

Question 19

Answer 19

Diffuse Astrocytoma, WHO II

cannot determine grade from imaging

Question 20

Answer 20

Diffuse Pontine Glioma (Astrocytoma)

Question 21

Answer 21

Diffuse Pontine Glioma (Astrocytoma)

Question 22

Answer 22

Diffuse Astrocytoma

Question 23

Answer 23

Diffuse Astrocytoma

Question 24

Answer 24

Diffuse Astrocytoma

Question 25

Answer 25

Diffuse Astrocytoma ## Footnote All of these are malignant astrocytes- very cellular

Question 26

Answer 26

Glioblastoma, WHO IV astocytoma

Question 27

Answer 27

Glioblastoma, WHO IV astrocytoma

Question 28

Answer 28

glioblastoma, IV atrocytoma ## Footnote High grade astrocytomas (glioblastomas) frequently have leaky vessels and the contrast goes into the viable areas - this one has hemorrhaged

Question 29

Answer 29

glioblastoma, IV atrocytoma ## Footnote High grade astrocytomas (glioblastomas) frequently have leaky vessels and the contrast goes into the viable areas.

Question 30

Answer 30

Glioblastoma, WHO IV the brown area is necrotic tissue

Question 31

Answer 31

Glioblastoma, WHO IV

Question 32

Answer 32

glioblastoma IV ## Footnote Even more cellular then grade II Sheets of pink are necrosis where tumor is outgrowing blood supply

Question 33

Answer 33

Glioblastoma, WHO IV Can see area of necrosis where tumor has outgrown blood supply

Question 34

Answer 34

Oligodendroglioma, WHO II

Question 35

Answer 35

Oligodendroglioma, WHO II

Question 36

Answer 36

Oligodendroglioma, WHO II

Question 37

Answer 37

Oligodendroglioma, WHO II

Question 38

Answer 38

Oligodendroglioma, WHO II fried egg appearance

Question 39

Answer 39

## Footnote Classic medulloblastoma (the majority) is a highly cellular tumor composed of diffuse masses of small, undifferentiated oval or round cells.

Question 40

Answer 40

Medulloblastoma. Midline cerebellar tumor and hydrocephalus.

Question 41

Answer 41

Medulloblastoma, WHO IV

Question 42

Answer 42

Medulloblastoma, WHO IV

Question 43

Answer 43

Medulloblastoma, WHO IV

Question 44

Answer 44

Medulloblastoma. Homer-Wright rosettes (groups of tumor cells arranged in a circle around a fibrillary center).

Question 45

Answer 45

Medulloblastoma, WHO IV

Question 46

Answer 46

Meduloblastoma, WHO IV homer-wright rossettes

Question 47

Answer 47

Medulloblastoma. A thick layer of tumor around the spinal cord, matting together the roots of the cauda equina (right).

Question 48

Answer 48

Ependymoma

Question 49

Answer 49

Ependymoma, WHO II

Question 50

Answer 50

Ependymoma, WHO II

Question 51

Answer 51

Ependymoma, WHO II

Question 52

Answer 52

Ependymoma, WHO II

Question 53

Answer 53

Schwannoma

Question 54

Answer 54

Schwannoma

Question 55

Answer 55

Schwannoma

Question 56

Answer 56

Schwannoma

Question 57

Answer 57

Schwannoma

Question 58

Answer 58

Schwannoma

Question 59

Answer 59

Meningioma

Question 60

Answer 60

Meningioma

Question 61

Answer 61

Diffuse Astrocytoma, WHO II

Question 62

Answer 62

Diffuse Astrocytoma, WHO II

Question 63

Answer 63

Glioblastoma

Question 64

Answer 64

Glioblastoma

Question 65

Answer 65

Medulloblastoma

Question 66

Answer 66

Medulloblastoma

Question 67

Answer 67

Schwannoma

Question 68

Answer 68

Schwannoma