Carotid chemodectomas. Experience with nine cases with reference to preoperative embolization and malignancy

Area of Science:

• Vascular Surgery
• Neurosurgery
• Oncology

Background:

• Carotid chemodectomas, also known as carotid body tumors, are rare neuroendocrine tumors arising from the paraganglia at the carotid artery bifurcation.
• Diagnosis can be challenging, with a significant percentage not suspected at initial presentation.
• These tumors can present with neck masses or, less commonly, neurological deficits due to cranial nerve compression.

Purpose of the Study:

• To review surgical outcomes for patients with carotid chemodectomas.
• To identify factors influencing complications and recurrence.
• To emphasize the importance of early surgical management.

Main Methods:

• Retrospective review of nine patients (1983-1995) with carotid chemodectomas.
• Analysis of presenting symptoms, diagnostic methods, surgical techniques, and postoperative outcomes.
• Evaluation of adjuvant therapies and follow-up data.

Main Results:

• Complete surgical excision was achieved in all patients with an adventitial plane of resection.
• Preoperative embolization was used in two cases; external carotid artery ligation facilitated resection in three.
• Postoperative neurological deficits (vagus and hypoglossal nerve palsies) occurred in 33% of patients, often associated with larger tumor sizes. No operative mortality or vascular complications were observed.
• Two tumors were malignant, treated with postoperative radiotherapy. No local recurrence was noted during a mean follow-up of 63 months.

Conclusions:

• Carotid chemodectomas can be safely and effectively resected surgically.
• Early surgical intervention is key to minimizing neurological complications and improving outcomes.
• While generally benign, malignant potential exists, necessitating appropriate adjuvant therapy and surveillance.