Stupid brain bleed question.

[xanthomondo]

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Just wondering if someone could provide some insight to my little peanut brain.

What is the difference between a brain contusion, subarachnoid hemorrhage, and intracranial hemorrhage? I understand the different mechanisms (accel-decel injury vs aneurysm vs reperfusion injury) but what is the difference between their morphologies? The first two kind of look the same to me.

 

[Jolie South]

A brain contusion is damage to the parenchyma itself. It results from trauma (i.e. coup/contra-coup).

A subarachnoid hemorrhage is a hemorrhage into the subarachnoid space that is most often caused by a ruptured berry aneurysm. I believe it is caused by damage to the somewhat larger vessels that course over the outside of the brain.

An intracranial bleed is just one within the skull. I don't think this denotes anything with regards to what vessels or the mechanism involved.

 

[xanthomondo]

A brain contusion is damage to the parenchyma itself. It results from trauma.

A subarachnoid hemorrhage is a hemorrhage into the subarachnoid space that is most often caused by a ruptured berry aneurysm. I believe it is caused by damage to the somewhat larger vessels that course over the outside of the brain.

An intracranial bleed is just one within the skull. I don't think this denotes anything with regards to what vessels or the mechanism involved.

Thanks, but I actually put a typo in my question 😳. What is the difference between contusion and an intracerebral bleed?

 

[Jolie South]

Thanks, but I actually put a typo in my question 😳. What is the difference between contusion and an intracerebral bleed?

A intraparenchymal bleed is one that affects the small vessels that course through the parenchyma. The most common causes are hypertensive bleeds and amyloid angiopathy.

 

[mmmcdowe]

A intraparenchymal bleed is one that affects the small vessels that course through the parenchyma. The most common causes are hypertensive bleeds and amyloid angiopathy.

A frustrating tidbit worth remembering as well is that AVMs are typically intracerebral but aneurysms are sub-arachnoid. The big exception is when you have an aneurysm within the nidus of an AVM 😛

 

[Jolie South]

A frustrating tidbit worth remembering as well is that AVMs are typically intracerebral but aneurysms are sub-arachnoid. The big exception is when you have an aneurysm within the nidus of an AVM 😛

I knew I was forgetting something. 🙂

 

[xanthomondo]

A frustrating tidbit worth remembering as well is that AVMs are typically intracerebral but aneurysms are sub-arachnoid. The big exception is when you have an aneurysm within the nidus of an AVM 😛

I knew I was forgetting something. 🙂

I get it now...thanks!