Cancer doesn’t observe holidays. Doesn’t take a vacation. Doesn’t step away for a brief time-out. Since the week before Thanksgiving, when my son, Kyle, discovered an unusual mass, cancer dictates how we spend our holidays. The day before Thanksgiving, Kyle went in for an ultrasound. After the results came back abnormal, we spent Black Friday, which also happened to be my birthday, in the ER waiting for a C.T. scan. Right before Christmas, Kyle had surgery to remove the malignant mass. Christmas Eve, we learned the mass was not an isolated tumor, but an extremely rare form of leukemia relapse. New Year’s Eve kicked off a two-year aggressive chemotherapy treatment.…