Malignant vagal paraganglioma: report of a case and review of literature.

A case of malignant vagal paraganglioma is presented. The literature on the subject is briefly reviewed. This report brings to 48 the number of vagal paragangliomas now in the medical literature. Eight of these cases are found to be acceptable examples of malignant paraganglioma with evidence of lymph-node or distant metastases, and pertinent findings from these cases are summarized. Salient features of other cases showing extensive local or vascular invasion are also reviewed.