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[PBR] Pediatric Imaging > Neuroradiology > Flashcards

Flashcards in Neuroradiology Deck (164)
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1

Myelination begins at what month of life

5th
Continuous throughout life

2

In a normal infant, myelination appears complete at what MR Sequence

T1

3

Myelination appears complete on T2 by what month of age

24

4

Myelination appears complete on FLAIR at what age

40 months

5

In term neonate, we should see T1 hyperintense myelin in what 3 parts of the brain

Deep cerebellar WM,
dorsal brainstem,
posterior limbs of internal capsules

6

Genu and splenium of corpus callosum are myelinated by what month of age

6 months

7

By what age is the appearance of white matter myelination in T1 similar to that of an adult

1 year

8

INTERHEMISPHERIC FALX become present with broad Sylvian fissure is seen at what fetal age

18 months

INTERHEMISPHERIC FALX = 19 - 1 = 18

9

More operculization of the Sylvian fissures and calcarine fissures start to form by what fetal age

22 weeks

10

The calcarine fissure are well formed at what fetal age

26 weeks

11

The temporal and frontal sulci are formed or forming by what fetal age

30 weeks

12

What fetal age does all the primary sulci form

34 weeks

13

Sylvian fissure becomes visible at what GA

16-18

14

Parieto-occipital fissure becomes visible at what GA

20-22

15

Calcarine fissure and callosal sulcus becomes visible at what GA

22-23

16

Central sulcus and cingular sulcus become visible at what GA

24-25

17

Precentral sulcus become visible by what GA

26 weeks

18

Post central sulcus and superior temporal sulcus becomes visible at what GA

27 weeks

19

Superior and inferior frontal sulci are visible at what GA

29 weeks

20

Inferior temporal sulcus is visible at what GA

33 weeks

21

All primary sulci and most secondary sulci are present at what GA

34 weeks

22

In complete agenesis of corpus callosum, the lateral ventricles have a parallel orientation, with posterior dilatation termed _______

Colpocephaly

23

What midline development abnormality demonstrates upturned anterior horns of lateral ventricle, absence of cingulate sulcus allowing the interhemispheric sulci to extend all the way to the 3rd ventricular margin with underrotation of the hippocampi—- in coronal images

Complete agenesis of corpus callosum

24

“Texas longhorn” appearance of lateral ventricles in coronal view can be seen in what midline abnormality

Complete agenesis of corpus callosum

25

Midline abnormality presenting as truncation of the anterior-posterior dimension, that can be segmental, with the callosum appearing as two separate commisures

Partial agenesis or hypogenesis of the corpus callosum

26

Midline abnormality that is frequently associated with interhemispheric cysts or lipomas

Partial agenesis or hypogenesis of the corpus callosum

27

Most common cortical development malformation associated with septo-optic dysplasia

Schizencephaly

28

Consist of optic nerve hypoplasia and partial or complete agenesis of septum pellucidum, dysgenesis of corpus callosum, anomalies of hypothalamic pituitary axis and malformations of cortical development, most notably schizencephaly

Septo-optic dysplasia

29

Encompasses a spectrum of malformations caused by abnormalities of differentiation and midline cleavage of prosencephalon during the 5th gestational week

Holoprosencephaly

30

Hallmarks of holoprosencephaly

-Abnormal communication of gray and/or white matter across midline
- facial dysmorphism (hypotelorism, cyclopia, ethmocephaly, cebocephaly, and midline cleft lip/palate