Cerebral venous thrombosis is a polymorphic clinical entity for which
diagnosis has become more frequent with the advent of neuroradiology.
The superior sagittal and transverse sinuses are frequently involved,
whereas cavernous sinus thrombosis is much less frequent. Inherited re
sistance to the anticoagulant action of activated protein C (APC resis
tance), antithrombin deficiency, protein C and S deficiencies, and hyp
erhomocysteinemia seem to represent major causes of thrombophilia when
unusual thromboembolic events (ie, before the age of 45 years) are ob
served. The authors present the combined occurrence of protein C and p
rotein S deficiencies in a 32-year-old woman, manifested by extensive
cerebralvenous thrombosis.