ARTIFICIAL SLOW-FLOW CAROTID ANGIOGRAPHY WITH TUMORS OF THE GLOMUS JUGULARE AND OF THE CAROTID BODY

P.C. angiograms with tumors of the glomus jugulare supplied by the external carotid artery may show denser and more extensive tumor patterns and denser and more detailed opacification of supplying arteries than seen in routine angiograms.

Gain in detail information with preservation of the image of skeletal structures allows better information about spatial relationships.

Subtractions of P.C. angiograms share the advantage of angiographic addition, but may reveal tumor patterns not seen in areas of great densities in the P.C. angiograms.

Unusual venous drainage in routine angiograms with tumors of the glomus jugulare may be the result of occlusion of the jugular bulb or originate from the tumor proper.

Venous outflow in the territory of the external carotid when visualized in P.C. angiograms, originates from arteriovenous shunts inside the tumor proper. P.C. angiography accentuates this outflow pattern.

Accessory venous drainage due to blocking of the jugular bulb, can be separately visualized in subtraction pictures of venous phases of selective routine internal carotid angiograms, provided the internal carotid body does not participate in the tumor supply.

P.C. angiograms with tumors of the carotid body display similar angiographic additional phenomena as seen with tumors of the glomus jugulare, with the exception of demonstration of venous outflow. Comparative routine and P.C. angiography with the needle in the internal carotid artery may be a simple method to estimate the share of the internal and external carotid arteries in the vascular supply of tumors of the carotid bodies.

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