In mid-June I will need to undergo surgery--I have a malignant growth on one side of my thyroid gland. I have NOT told my Mom it's cancerous (she had a mastectomy in 1988, when she was 58). She does know I will have surgery. Then two weeks later I will have to go back for a post-operative isolation for a few days...some close relatives will take my place. How should I prepare my mother (of the "Doppelganger" situation) for this?