I was involved in a lawsuit a few years ago. The attorney that handled my case accidentally let it slip that he was involved in a MAJOR lawsuit involving patches and topical T used in and around the heart that led to death(s). I asked for more information but he apologized for his remark and indicated that the usual NDA and settlement language were in effect.
I can't recall exactly why he made the statement other than I might have mentioned I had used T at times. (not part of my lawsuit with him) He might have just been trying to warn me.
I have at times used topical T (androgel) on my chest but never did since then. Better on my thighs but not near groin. The only T that really works for me is 1ml injections on a weekly basis and that requires me to donate blood 12x a year (6 with MD and 6 at blood bank)
Bottom line, don't put it near your heart or chest and watch your HCT. Get a good hormone MD that also understands all of the interplay with DHEA, estradiol etc.