I doubt anyone here has personal experience of prostate or uterine cancer that would be attributable to a SERM, if that is what you mean.
In terms of a correlation to prostate cancer, my first reaction is that it is highly unlikely. The Endocrinologist brings up some interesting research, and some interesting points. However, his views are highly slanted. He seems outraged that a cancer drug has toxic effects, while it prolongs the life of patients. I can only imagine his take on chemotherapy!
The truth is that long-term studies HAVE been conducted on humans, one of which used clomiphene on men continuously for a year without many observed health effects.
While you are listening to this single Endocrinologist's radical opinion on SERMS, I would bet that you would fully ignore everything he would say about prohormones impact on health.
In terms of SERMS in general, they are important for PCT for many reasons, which are well elucidated in many, many posts both here and elsewhere, and do not need to be repeated in this thread. In fact, a PCT protocol was developed by a team of ENDOCRINOLOGISTS using two different SERMs for recovery.
In terms of you particular situation, if I remember correctly (and please someone correct me if I'm wrong), the original halodrol was a PH for Oral Turinabol. OT is not generally recognized to produce highly estrogenic side affects, making use of SERMS or AIs on cycle less important, but the use of SERMs post cycle is often still recommended due to their affect of increasing activation of the HPTA (some, however, feel this unnecessary, using the logic that since SERMs work via decreasing the inhibitory affects of estrogen on the HPTA, and since OT and similar AAS do not cause an overt excess of estrogen, that this would not in fact help them recover).
My take is that, since even under normal physiological conditions with normal estrogen levels SERMS have been shown to increase function of the HPTA, and being that Clomiphene in particular increase HDL that can be negatively affected via AAS use, one would do well to use such a SERM post cycle.