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Flashcards in Space Occupying Lesions Deck (41)
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1

What forms the roof over the pituitary fossa?

Diaphragm Sellae

2

What lays over the cerebellum separating it from the cerebrum?

Tentorium Cerebelli

3

What midline structure seperates the left and right cerebral hemispheres running from the ethmoid bone to the posterior occipital protuberance?

Falx cerebri

4

What is hydrocephalus?

Excessive Production, obstruction or inadequate resorption of CSF.

5

Extradural haemorrhage

Between bone and dura

6

Extradural can also be known as?

Epidural

7

What artery if ruptured commonly results in an extradural haemorrhage?

Middle Meningeal Artery

8

Subdural Haemorrhage

Between the dura and arachnoid matter

9

What if ruptured commonly results in a subdural haemorrhage?

Cerebral veins - falls in the elderly

10

Subarachnoid haemorrhage

Bleed into the CSF of the subarachnoid space

11

What if ruptured would lead to a subarachnoid haemorrhage?

Circle of willis or congenital aneurysm

12

A single abscess is likely to be due to?

Local extension e.g mastoiditis dental infection
Direct Implantaion e.g. skull fracture

13

List some causes of a local extension abscess.

Mastoiditis
Chronic ottitis media
Paranasal sinusitis
Dental infection

14

Multiple abscesses are usually due to.

Haematogenous spread.
Bronchiectasis, Endocarditis, IV drug abuse

15

What do abscesses look like?

Central Necrosis and a fibrous capsule
Surrounded by oedema

16

How is an Abscess diagnosed?

CT MRI
Aspiration for culture and treatment

17

What is the golden rule of trauma?

Smaller the contact time the larger the force is applied.

18

What is the primary damage in brain trauma?

Irreversible injury to neurones

19

Is primary damage treatable?

No it is only preventable through safety measures like wearing a helmet etc

20

What is secondary damage in brain trauma?

Potentially treatable haemorrhage oedema etc

21

Why do Skalp lesions present an issue?

As they can present route of entry for infection

22

If a skull fracture is straight and sharp it is a...

Linear fracture

23

If a linear fracture crosses a suture it is known as a..

Diastatic

24

Compound fractures are associated with...

Full thickness lacerations

25

Base of skull fractures are all....

Compound fractures

26

Depressed fractures present a risk because..

They allow direct infection of the brain

27

Surface contusion and laceration of the brain is due to..

Compression of brain tissue
Basically bruising of the brain tissue

28

What areas of the brain are most commonly affected by contusion?

Lateral surfaces of the hemispheres
Underneath the temporal and frontal lobes

29

Contra coup is what?

Contusion to the brain on the opposite side to the trauma.

30

Contracoup involves less force than Coup.

False it involves more force an CSF has shifted to side of trauma thus reducing cushioning.
Damage is worse.