I just got done with my first leave post surgery. I have been with my company for 10 years and never abused the use of sick days. At my company, we don't carry over sick leave from year to year. So, technically I was out of sick leave and into vacation time after 1 week. Including pre-op appointments, scans, etc. I have missed about 4 weeks this year due to PC.
I was concerned like you about work, however, I was honest with my boss about my situation, telling him beforehand that I did not know what to expect. My boss has been great and we have agreed to work together as long as I keep him informed. I worked from home as I was able. I probably will not take my normal 20 days of vacation time this year, but may take some.
It sounds like you have earned credibility with your employers through your entire work history. I think if you are straight up with them, you should have nothing to worry about. I think employers may become more easily frustrated with employees who somehow manage to use all of their sick days and somehow they always get sick on Mondays and Fridays.
I think most of us know which group we fit in.
PSA 3.9 - October 2010 at annual physical
PSA 4.1 - November 2010 after a month of antibiotic, DRE Normal
Age 41 in December 2010 at Dx of 6 of 12 cores positive T1C and Gleason 3 + 3
open RP on 2/14/11 at Mass General
Post Surgery Pathology Report: Gleason 6, T2, Cancer in 35% of Prostate, All Margins Clear