OBJECTIVETo analyze the surgical data of well-differentiated invading thyroid carcinoma (WITC) , for acquiring the clinical experience.

METHODSA retrospective analysis was made in 201 cases with well-differentiated invading thyroid carcinoma in Liaoning Tumour Hospital from 1984 to 2000. The data were statistically treated for survival curves according to the Kaplan-Meier method. The Log-Rank tests were employed to assess the statistical significance of various groups.

RESULTSThere were 3 cases with total laryngectomy and partial cervical trachea resection, 6 cases with partial cervical trachea resection, 67 cases with shaving off tumor from its surface, 9 cases with recurrent laryngeal nerve resection, 26 cases with shaving off tumor from the surface of recurrent laryngeal nerve. Other local structures invaded in 90 cases was resected with the thyroid tumour en bloc. One hundred and eighty nine cases with one thyroid lobe and isthmus ectomy, 5 cases one lobe and opsite subtotal ectomy. One hundred and twenty nine cases simultaneous neck dissection (5 cases bilateral neck dissection), in them, 75 neck radical neck dissection, 59 neck modified dissection. The 5-, 10- and 15-year living rates of well-differentiated thyroid carcinoma patients were 85.6% , 77.3% and 69.4% respectively. Multivariate analysis showed that patients' age, tumour invading structure were independent prognostic factors.

CONCLUSIONSWith proper operation, a better cure will be made in WITC.