From Greenberg's neurosurgery handbook, for persian translation see rahimhamrah.blogfa.com

1. Dr Rahim Hamrah

2.  Pre 1943= Subdural Abcess
 Supporative infection under dura
matter
 No barrier for its distribution in
cerebral fissure
 Poor antibiotic penetration
 Different from intracerebral
abcess (inflammatory reaction
with fibrin and collagen capsule
 Complications: cerebral abcess,
cortical venous thrombosis with
venous infarction, regional
cerebritis

3.  Direct distribution
(diploid veins)
 Chronic otitis
media
 Paranasal sinusitis
 Cranial traction
device
 Trauma
 Others:
osteomyalitis,
pneumonia

4.  Differs with source of infection
 Sinusitis -> streptococci
 Trauma and iatrogenic -> staphylococci
 Sterile culture in 40%

6.  CT
 MRI
 LP

7.  Draingae with Burr hole
 Craniotomy
 antiobiotic