I had a modified neck dissection January 11 after diagnosis of papillary cancer. I had a long surgery (4 1/2 hours, surgeon says loss of blood flow to parathyroids over this length of time can cause permanent damage) and I lost one parathyroid during surgery. Since then, have been hypocalcemic and taking multiple daily doses of calcium and Calcitriol (1500 mg calcium, 3xdaily). Both endo and surgeon say it can take up to a year for normal calcium production to resume. I had RAI (200 mCi) Feb. 29 and started on Synthroid March 3. Trying to fit all of the calcium doses around the Synthroid (no calcium 4 hours before/after Synthroid) is problematic. Then endo called with results of blood work; he left a message telling me my parathyroid number was still low, without actually telling me what the level is. He also said the RAI could delay the recovery of parathyroids (first time I'd heard this, haven't seen it mention on boards). Woudl anyone share their experience with this, and possible throw me some hope that this may resolve? Thanks.