Thank you for the query.
Such symptom does not have to be associated with your cancer. Hip pain
, radiating to the testis can be simply caused by urinary tract infection
, urinary tract stones,testis inflammation
or prostate inflammation
If the pain has started after the surgery, some nerves in the operated area (quite common complication) could have gotten harmed.
I suggest you to have urine analysis and testis inflammation first. In case of urine infection, antibiotics should be prescribed.
Hope this will help.