LANDMARK: Hypoparathyroidism after total thyroidectomy Ritter K, Elfenbein D, Schneider DF, Chen H, Sippel RS. Hypoparathyroidism after total thyroidectomy: incidence and resolution. J Surg Res. 2015;197(2):348-53. Take Home Points: Majority of patients with low post-operative PTH (<10 pg/mL), recover to normal parathyroid function within 12 months.