Abstract
Isthmusectomy in the treatment of well-differentiated thyroid carcinoma (WDTC) is controversial. In this study, we analyze the outcomes of WDTC managed by isthmusectomy alone. Forty-three patients treated with isthmusectomy alone were identified from an institutional database of 6259 surgically treated patients with WDTC. Patient and tumor characteristics were analyzed. Disease-specific survival (DSS) and recurrence-free survival (RFS) were calculated using the Kaplan-Meier method. The pT classification was T1 for 41 and T2 for two patients. All were clinical N0, but 10 pts were pN1a. Using the American Thyroid Association risk stratification system, 9 patients were low-risk and 22 were intermediate-risk. One patient developed local recurrence, and two developed regional lymph node metastases; the 5- and 10-year DSS was 100.0%. The 5- and 10-year RFS was 93.1%. Isthmusectomy alone is an acceptable procedure in selected patients with low- and intermediate-risk WDTC limited to the isthmus.
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