I had a great time online dating. I either referred to the cancer in my profile or told potential suitors before I actually met them. Same applied to anyone I met anywhere else if a date option presented itself.
I can truly say it hasn't been a problem. Anyone who was disturbed by it was better off out of the program early. There are very few people, male or female, who make it into their sixth and seventh decades without a few scratches and dents; if you are honest about your issues you may find that honesty reciprocated which is healthy and takes a great deal of stress out of the whole exercise.
I'm now in my fifties and have been with my partner for nearly 5 years. He didnt baulk when he found out I'd had the disease and didn't bolt when it came back. The men I test drove before this one came along moved on for reasons other than my peculiar tits :)