Carotid dissection causing stroke in a 13-year-old boy with mild hyperhomocysteinemia: case report.

The author describes a 13-year-old Thai boy who developed stroke caused by carotid dissection and found mild elevation of plasma homocysteine (tHcy). The patient improved after anticoagulation therapy and his plasma tHcy decreased after vitamin supplement. With long-term follow-up, he is having normal neurological condition. This case proposes that the pathogenesis of carotid dissection may associate with mild hyperhomocysteinemia.