Male breast cancer and testosterone supplementation?

Risky: Most experts are concerned about testosterone replacement in male breast cancer. For most men it is a hormone driven cancer. There is some conversion of testosterone to estrogen that may stimulate growth of breast cancer cells.

What is the question: Asking if testosterone causes male breast cancer or increases its risk? Asking if testosterone should be taken by a man with breast cancer? Should not take hormone supplements if one has male breast cancer without conferring with your oncologist first.