What Can Determine the Length of an Open Nonendoscopic Thyroidectomy Incision?

Objectives Surgeons are now utilizing small incisions when performing thyroidectomy. This study evaluated the association between patient weight, nodule size, and maximum thyroid diameter and the length of an open thyroidectomy incision. Study Design Retrospective analysis of 32 consecutive patients. Subjects and Methods Patient demographics, clinical exam, ultrasound findings, operative findings, and pathology were recorded. Results Of the 32 patients (81% women), 27 underwent a hemithyroidectomy. The mean patient weight was 194 lbs. The mean clinical nodule diameter was 3.46 cm, and the mean maximum thyroid diameter was 5.91 cm. The mean incision size was 5.13 cm. Independently, patient weight, maximum thyroid diameter, and maximum nodule diameter were shown in regression models to be statistically significant predictors of incision size. In stepwise regression analysis that included all three listed variables, maximum thyroid diameter was the most significant predictor of incision size ( p < 0.0001). Conclusions Surgeons may determine the length of the incision using clinical and radiologic parameters, but most probably use their subconscious clinical judgment and the challenge of utilizing a very small incision for this operation. This study has shown that maximum thyroid diameter is the most significant determinant for the incision but that nodule size and patient weight are also significant factors. This study is evidence-based medicine level III.