Figure 1.

A nomogram for lateral cervical lymph node metastasis of medullary thyroid cancer. (To use this, locate a patient’s value on each variable axis and draw a line up to determine the number of points earned for each variable value. The sum of these numbers is on the total points axis, and then draw a line below the survival axis Line to determine the possibility of lateral cervical lymph node metastasis. Sex, the patient’s physiological gender; Ln_Ctn, the natural logarithm of the patient’s preoperative serum calcitonin; US_Focus, the number of suspicious nodules indicated by the patient’s preoperative ultrasound; US_Lateral_LNM, preoperative Ultrasound revealed suspicious metastasis of lateral cervical lymph nodes.).