PTH and cancer: The baseline characteristics showed that 29 (18.7%) patients had one gland, 12 (7.7%) patients had two glands, four patients (2.6%) had three glands, and only one patient (0.6%) had all four glands, 29 (18.7%) had lymph node extension, 53 (34.2%) had malignant neoplasms, four (2.6%) had complications, 15 (9.7%) had low calcium level before surgery, and 11 (7.1%) had low PTH levels before surgery (Table 1).