Most cancer is caused by citric acid? Sounds like a sure bestselling topic for a new book, but does not sound logical to me.
I'm not ruling out the possibility that citric acid may have contributed to your cancer in some way, but mankind has been consuming fruits and citric acid for eons and the incidence of cancer was 1 in hundreds until the advent of modern toxins and the depletion of our soils and nutrition.
Ovarian cancer can be tough - but that does not mean it is a death sentence.
PS - I eat lemons frequently - often pureeing them up seeds, rind and all in my Oster blender along with other fruits and juices and a good dollop of Dr. Shulze formula supergreen food powder.