- Patients must have adequate organ function to safely undergo general anesthesia and thyroidectomy. Laboratory values obtained less than or equal to 4 weeks prior to surgery must demonstrate adequate bone marrow function (Hb greater than or equal to 6.0 mmol/L, absolute neutrophil count greater than or equal to 1.5 x 10^9/L, platelets greater than or equal to 80 x 10^9/L), liver function (serum bilirubin less than or equal to 2 x ULN, serum transaminases less than or equal to 3 x ULN). Patients with chronic kidney disease who are on chronic renal replacement therapy are allowed.. Other tests, such as pulmonary function tests, cardiac echocardiogram or stress test, will be performed if clinically indicated.