Abstract:Objective To explore the clinical value of prophylactic central cervical lymph node dissection(PCND) as initial treatment for the patients with cN0 papillary thyroid carcinoma(PTA).Methods Literatures were researched using PubMed, EMbase, The Cochrane Library, CNKI, Wanfang database and the Chinese Biomedical Literature Database from 2007 to 2017 with the key words including “papillary thyroid carcinoma, prophylactic central neck dissection/prophylactic central cervical lymph node dissection, recurrence, complication”. The cohort studies about comparison of clinical effects of thyroidectomy alone and thyroidectomy combined with prophylactic central cervical lymph node dissection were received and enrolled. Patients underwent papillary thyroid carcinoma using thyroidectomy alone and thyroidectomy combined with prophylactic central cervical lymph node dissection were respectively allocated into thyroidectomy group(control group) and thyroidectomy+prophylactic central neck dissection group(observation group). Two reviewers independently screened literatures, extracted data and assessed the risk of bias. Count data were described as odd ratio (OR) and 95% confidence interval (CI). The heterogeneity of the studies was analyzed using the I2 test.Results After literature screening, 10 articles were selected, all of which were retrospective cohort study. A total of 3 383 subjects were enrolled, including 1 797 cases in control group and 1 586 cases in observation group. Meta-analysis showed that: there was no significant difference in the local recurrence rate between the two groups(OR=0.97, 95%CI 0.63-1.50, P=0.90). In observation group, the risks of temporary hypocalcemia (OR=2.20, 95%CI 1.81-2.68, P<0.000 01), permanent hypocalcemia (OR=3.02, 95%CI 1.97-4.61, P<0.000 01), temporary recurrent laryngeal nerve injury (OR=1.58, 95%CI 1.06-2.34, P=0.02), permanent recurrent laryngeal nerve injury (OR=1.90, 95%CI 1.10-3.58, P=0.05)were higher than those of control group, and the differences were statistically significant.Conclusionse PCND for the patients with cN0 PTA does not reduce the local recurrence rate, but significantly increases the risks of the complications.
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