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csfcisterns1-110830092038-phpapp01

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csf cisterns
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DR/ Hytham Nafady
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DR/ Hytham Nafady

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Cistern

• Widening of subarachnoid space created by separation of pia and arachnoid.

Dura

Pia

Arachnoid

adherent to the skull

adherent to the brain surface

covers only superficial surface of the brain

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Cistern

• Widening of subarachnoid space created by separation of pia and arachnoid.

Subarachnoid hemorrhage

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P

M

IPCH

SC

CM

VI

Q

PC

LT

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P

M

IPCH

SC

CM

VI

Q

PC

LT

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P

M

CH

CM

VI

PC

LT

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Perimesencephalic cistern

1. Interpeduncular C.

2. Crural C.

3. Ambient C.

4. Quadrigeminal C.

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Perimesencephalic cistern

1. Interpeduncular C.

2. Crural C.

3. Ambient C.

4. Quadrigeminal C.

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Perimesencephalic cistern

1. Interpeduncular C.

2. Crural C.

3. Ambient C.

4. Quadrigeminal C.

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Perimesencephalic cistern

1. Interpeduncular C.

2. Crural C.

3. Ambient C.

4. Quadrigeminal C.

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Perimesencephalic cistern

1. Interpeduncular C.

2. Crural C.

3. Ambient C.

4. Quadrigeminal C.

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CSF cisterns

Median un-paired cisterns Para-median paired cisterns

1-Premedullary 12-Inferior CP angle

2-Prepontine 13-Superior CP angle

3-Interpeduncular 14-Crural

4-Chiasmatic 15-ambient

5-Lamina terminalis 16-Carotid

6-Pericallosal 17-sylvian

7-Quadrigeminal

8-Vellum interpositum

9-Superior cerebellar

10-Cisterna magna

11-Vallecula

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Medullary cisternpremedullary cistern

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Medullary cistern

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PICA

Cn12

VA

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Pontine cistern pre-pontine cistern

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Pontine cistern

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Pontine cistern

Basilar AAnt. Pontomesencephalic V

Petrosal VSuperior petrosal sinus

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Pontine cistern

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Pontine cistern

AICA

BACn6 Cn6

BA

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Pre-pontine arachnoid cyst

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Interpeduncular cisternbasal cistern

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Interpeduncular cistern

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Interpeduncular cistern

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Basal v.

Interpeduncular VDMCV Ponto-

mesencephalic V Basilar A.

Interpeduncular V

DMCV

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Chiasmatic cisternSuprasellar cistern

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Chiasmatic cisternSuprasellar cistern

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Suprasellar arachnoid cyst

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Liliequist membrane

The Liliequist membrane is the arachnoid membrane separating the chiasmatic and interpeduncular cisterns.

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Liliequist membrane

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CH

P

IP

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Third ventriculostomy

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Third ventriculostomy

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PNSAH

• Peri-mesencephalic Non-aneurysmal Sub-Arachnoid Hemorrhage.• Pre-truncal Non-aneurysmal Sub-Arachnoid Hemorrhage.

• Brain stem = truncus cerebri.

• Low pressure bleeding.

• Source: perimesencephalic vein.

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Lamina terminalis cistern

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Pericallosal cistern

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Pericallosal artery aneurysm

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Subarachnoid hemorrhage

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Quadrigeminal cisternvein of Galen cistern

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Vein of Galen aneurysm

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Precentral VPrecentral VPrecentral V

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Precentral V

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Quadrigeminal cistern epidermoid cyst

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Superior cerebellar cistern

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Vellum interpositum cistern(double layered tela choroidae)

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Embryologic Basis for the Development and Anatomy of the Cavum Veli Interpositi

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Vellum interpositum cistern

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Cavum vili interpositi

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Cavum villi interpositi Cavum septum pellucidum & cavum vergae

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Cisterna magna Cerebellomedullary cistern

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Mega cisterna magna

Mega cisterna magna

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Vallecula cerebelli

Vallecula

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Dandy walker variant

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CP angle cisterns

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CP angle cistern

AICA

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Superior CP angle cistern

AICA

AICAAICA

AICA

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Inferior CP angle cistern

Cn 9/10

Cn 10

Cn 9

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Inferior CP angle arachnoid cyst

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Crural cisterns

Between the

Crus cerebri (cerebral peduncles

Uncus of temporal lobe

Medially Laterally

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AchA AchAAchA

SCAPCA

PCA

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Carotid cisterns

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Sylvian cisterns

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Ambient cisterns

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Trochlear N.

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PCA

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Basal vein of Rosenthal

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Basal vein of Rosenthal

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Basal vein of Rosenthal

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Cn 4

epidermoid

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Trochlear N. schwannoma

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Retro-thalamic cisternswings of ambient cisterns

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Vellum interpositum

Retro-thalamic Cistern

Retro-thalamic Cistern

Sup.cerebellar Cistern

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Overview of CSF spaces

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Overview of CSF spaces

Normal:

All CSF spaces are visible neither effaced or dilated.

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Overview of CSF spaces

Normal:

All CSF spaces are visible neither effaced or dilated.

Atrophy:

All CSF spaces are dilated.

Hydrocephalus:

Ventricles dilated.

Subarachnoid spaces effaced.

Edema:

All CSF spaces are effaced.

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Overview of CSF spaces

Normal:

All CSF spaces are visible neither effaced or dilated.

Atrophy:

All CSF spaces are dilated.

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Overview of CSF spaces

Normal:

All CSF spaces are visible neither effaced or dilated.

Atrophy:

All CSF spaces are dilated.

Hydrocephalus:

Ventricles dilated.

Subarachnoid spaces effaced.

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Overview of CSF spaces

Normal:

All CSF spaces are visible neither effaced or dilated.

Atrophy:

All CSF spaces are dilated.

Hydrocephalus:

Ventricles dilated.

Subarachnoid spaces effaced.

Edema:

All CSF spaces are effaced.

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Benign external hydrocephalus

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3 years10 months

Benign external hydrocephalus

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Benign external hydrocephalusbenign enlargement of subarachnoid spaces in infancy

Etiology:

• Immature arachnoid granulations.

C.P:

• Macrocephaly.

• Normal developmental milestones.

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1. Widening of the bifrontal subarachnoid space and anterior interhemispheric fissure (>5mm).

2. Usually normal subaracnoid space posteriorly.

3. No flattening of adjacent gyri.

4. The anterior fontanelle is frequently enlarged.

5. The ventricular system is within normal limits or slightly dilated.

6. There are no pressure effects on the surrounding brain tissue or cerebral atrophy.

7. No blood products on MRI study.

8. another key distinction between benign enlargement of the subarachnoid spaces and a subdural fluid collection is that in the former the cortical veins will be adjacent to the inner table of the calvarium on MR and ultrasound; whereas in the latter the veins are displaced away from the inner table, as the arachnoid membrane and subarachnoid space are displaced.

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Benign external hydrocephalus

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Benign external hydrocephalus

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External hydrocephalus vs subdural hematoma

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Hydrocephalus versus atrophyFeatures that favor hydrocephalus• Dilatation of the temporal horns• Peri-ventricular interstitial oedema . • intra-ventricular flow void from CSF movement on MR • Widening of the third ventricular recesses : mid sagittal plane • Upward bowing of the corpus callosum  : mid sagittal plane• Decreased mammillo-pontine distance : mid sagittal plane

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Mid-sagittal findings of hydrocephalus

• Widening of the third ventricular recesses. 

• Upward bowing of the corpus callosum.

• Decreased mammillo-pontine distance .

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Periventricular leukomalacia

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