Dr. Charles "Snuffy" Myers spoke at length (or lack thereof) on impact of Radiation and ADT on Penis size a few years ago
/askdrmyers.wordpress.com/page/16/His conclusion was that though Lupron causes a temporary loss of length of penis, once Lupron ends, and testosterone starts to rise, so does the penis size.
The Turkish 18-month study he discusses is attributed more to the radiation treatments than to the Lupron which was stopped after 9 months.
At end of video, he also indicates use of vacuum pump or traction devices can mitigate loss of penile shrinkage
On the next page Dr Myers addresses the topic of this thread post surgery
/askdrmyers.wordpress.com/page/17/Again Vacurect device is discussed
LupronJim