I was recently scheduled for a hysterectomy and the Surgeon cancelled the surgery because of the TSH result from my pre-op blood test. If the T3 & T4 results are in the reference range is there a risk of going under general anesthesia? If so, what are they and where might I find what the statistics are? Istaffordcomcastnet (talk) 17:22, 5 October 2008 (UTC)