23. Cavernoma
Venous Sinusoidal , thin-walled, and dilated and
have a single-cell endothelial layer
absence of any parenchyma within the lesion
Low flow: pressure more than cvp.
Growth : thrombosis , endothelial proliferation
hemorrhage ( diapedesis )
angiogenic factors
24. Cavernoma presentation
Headache
Seizure : hemosiderin ring
Hemorrhage : capsular not overt
Focal deficit
Pregnancy : growth
Cummulative Risk of hemorrhage :
more in young
26. Treatment
Surgery ;
young ,
hemarrhage
seizure ; hemosiderin ring
focal deficit
27. AVM
Abnormalities of the intracranial vessels that
constitute a connection between the arterial and
venous systems and that lack an intervening
capillary bed.
Nidus , art.Feeder & venous drainage