Hi there,This is Dr Basu, experienced Internal Medicine Specialist.I am here to address your concerns and provide great service.
Sorry to hear that. What cancer was treated with chemotherapy? Testosterone deficiency will cause shrinking commonly. Hence testosterone supplementation will help if you were not treated for prostate cancer. Another option will be surgical reconstruction. Penile implant will be an effective treatment option to facilitate sexual activities. PDE5 inhibitors like Tadalafil can be tried as well to help with the erection and hence the lengthening of penis during sexual activity. Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star on top).Please bookmark my profile for fast, reliable authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/