I also have clear cell. I had hysterectomy in September 2005. At first they told me I had grade 1 to 2 adenocarcinoma. Then the pathologist did further studies and said it was clear cell. I had lymph node dissection done with the hysterectomy (all nodes negative), but had peritoneal washings done which did show cancer cells. I am getting chemo currently. I have completed 3 of 6 doses of carboplatin/Taxol. It's rough. I will be glad when it is completed. They plan to do radiation therapy after I complete the chemo.
I was told that my clear cell cancer probably started from endometriosis in the fallopian tube, then spread to the uterus, and a small amount to the left ovary. Funny thing was, I never knew that I had endometriosis, had none of the typical symptoms.
You certainly have my sympathies in the loss of your wife.
I hope my information is useful to you in some way.
Best regards,
Charee