RESEARCH SUPPORT, N.I.H., INTRAMURAL
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Preoperative Imaging Features are Associated with Surgical Complications Following Carotid Body Tumor Resection.

BACKGROUND: Surgical resection remains the treatment of choice for carotid body tumors (CBTs). Although perioperative complications such as carotid artery injury and neurological deficits occur infrequently, they can be devastating. The aim of this study was to evaluate whether clinical factors or preoperative imaging findings can accurately predict perioperative complications.

METHODS: Twenty CBTs were resected from 19 patients. Preoperative computed tomography (CT) and magnetic resonance imaging (MRI) of the neck were used to measure the degree of circumferential involvement of the CBT to the internal carotid artery (ICA), carotid artery narrowing, tumor length, tumor volume, and the distance from the tip of the C2 dens to the superior aspect of the CBT (dens-CBT). Operative reports and Shamblin classification (I-III) of each tumor were independently reviewed. Preoperative imaging features were compared to perioperative cranial nerve injury (CNI), rates of carotid artery injury, and major carotid artery repairs, as well as Shamblin classifications≥II.

RESULTS: CNI was associated with a high-lying CBT (dens-CBT=1.8 vs. 2.9 cm, p<0.01). All four patients with CNI had a dens-CBT of <3 cm. Neither tumor length and tumor volume nor the involvement of the ICA (≥180° as measured by CT or MRI) was associated with CNI, carotid artery injury, major carotid artery repair, or Shamblin II or III classification. No carotid artery narrowing was observed in any of the cases.

CONCLUSIONS: Preoperative measurement of the dens-CBT is helpful in identifying CBTs at risk for CNI after surgical resection.

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