Suicide myths and health care provider bias

Four cases of carotid body tumor are reported, and the diagnosis and treatment are also discussed. We consider that color Doppler flow image and carotid angiography, especially digital subtraction angiography, are of great value to the diagnosis of carotid body tumor. In addition, the collateral cerebral cross-flow was promoted preoperatively with the use of compressing exercises of the carotid artery, and controlled by transcranial Doppler. This means to provide the basis for choosing the operative opportunity and for managing the carotid artery. The operative method was dependent on preoperative color Doppler flow image, carotid angiography, and relationship between the tumor and the carotid artery during operation.