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Predictors for postoperative cranial nerve complications in carotid body tumor resection. a retrospective cohort study.
International Journal of Surgery 2023 September 19
INTRODUCTION: Carotid Body Tumors (CBTs) are slow-growing benign tumors. Therefore, surgical resection is considered in case of tumor growth. Timing of surgery is of the utmost importance as the risk of iatrogenic surgical complications increases when resecting larger tumors, whereas on the other hand resections for asymptomatic small CBT should be prevented. The primary aim of this study was to identify which tumor size or dimension is most accurate to predict nerve injury in patients undergoing resection of a CBT.
MATERIAL AND METHODS: This retrospective cohort study included patients who underwent surgical resection of CBT at the university hospital in South-Holland. Baseline patient characteristics and tumor measurements were retrieved from the medical records. We assessed how the different methods of measuring the size of the tumor were interrelated using Pearson correlation. Logistic regression was used to assess which variables were independently associated with nerve injury, including age at surgery, Shamblin classification and those dimensions that captured different aspects of tumor size (rather than measuring the same as shown by high correlations) as possible independent variables.
RESULTS: In 125 patients, 143 CBT were resected whereof in 35 cases cranial nerve injury occurred, (transient in 16 cases and permanent in 19 cases). The risks for nerve injury increased with larger tumor size and Shamblin classification. Logistic regression analysis showed that the anterior-posterior (AP) diameter significantly increased the odds of a nerve injury, a doubling for every 1 cm increase in AP diameter (odds ratio [95%CI] 2.12[1.29-3.48], P-value=0.003.
CONCLUSION: This study shows that measured tumor size in AP plane is a strong predictor for postoperative nerve injury of a CBT resection. This predictor can be used in daily clinic to give insight in operative risks. More research is needed in order to select the most appropriate time window for CBT resection.
MATERIAL AND METHODS: This retrospective cohort study included patients who underwent surgical resection of CBT at the university hospital in South-Holland. Baseline patient characteristics and tumor measurements were retrieved from the medical records. We assessed how the different methods of measuring the size of the tumor were interrelated using Pearson correlation. Logistic regression was used to assess which variables were independently associated with nerve injury, including age at surgery, Shamblin classification and those dimensions that captured different aspects of tumor size (rather than measuring the same as shown by high correlations) as possible independent variables.
RESULTS: In 125 patients, 143 CBT were resected whereof in 35 cases cranial nerve injury occurred, (transient in 16 cases and permanent in 19 cases). The risks for nerve injury increased with larger tumor size and Shamblin classification. Logistic regression analysis showed that the anterior-posterior (AP) diameter significantly increased the odds of a nerve injury, a doubling for every 1 cm increase in AP diameter (odds ratio [95%CI] 2.12[1.29-3.48], P-value=0.003.
CONCLUSION: This study shows that measured tumor size in AP plane is a strong predictor for postoperative nerve injury of a CBT resection. This predictor can be used in daily clinic to give insight in operative risks. More research is needed in order to select the most appropriate time window for CBT resection.
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