Clinical analysis of primary hyperthyroidism complicated with thyroid carcinoma

Objective To analyze the clinicopathological features of primary hyperthyroidism complicated with thyroid carcinoma. Methods From January 2010 to July 2018, 418 patients complicated with thyroid cancer underwent thyroidectomy in the First Affiliated Hospital of Xiamen University were retrospectively analyzed.According to thyroid function, 418 patients were divided into two group: A group(n=39) had hyperthyroidism with thyroid carcinoma, and B group(n=379) had normal thyroid function.The clinicopathological features of the two groups were analyzed and compared. Results There were no statistically significant differences in age, sex, tumor stage and tumor diameter between the two groups(all P>0.05). The lymph node metastasis rate in A group was 17.9%(7/39), which was higher than that in B group[6.1%(23/379)](χ2=5.814, P=0.016). The incidence rate of temporary hypoparathyroidism in A group was 28.2%(11/39), which was higher than that in B group[13.2%(50/379)](χ2=6.394, P<0.05). The local recurrence rate in A group was 5.1%(2/39), which was higher than that in B group[2.4%(9/379)], but there was no statistically significant difference(χ2=0.248, P=0.619). The 5-year disease-free survival rate in A group was 84.6%(33/39), which was lower than that in B group [95.8%(363/379)](χ2=6.740, P<0.05). Conclusion Hyperthyroidism complicated with thyroid carcinoma has high aggressive behavior and should be treated actively. Key words: Hyperthyroidism; Thyroid neoplasms; Thyroid function tests; Hypothyroidism; Neoplasm staging; Lymphatic metastasis; Neoplasm recurrence, local; Survival rate; Pathology, clinical