Your husband has undergone Testicular removal for gangrenous cancer Testis. He has undergone Chemotherapy
. Now he has painful bowel movements with heavy bleeding.
He was told as he may have peri anal disease. The Peri anal disease may be related to the previous problem.
He needs to complete clinical examination + rectal and colonoscopy
examination along with USG/CT abdomen to arrive at a diagnosis.
Only after diagnosis we can give the proper treatment. Meanwhile you can take treatment for fever
and bleeding and measures to improve his general condition