thought you'd appreciate this info bomb. I posted this on hairlosshelp forums and Dr. Bridges responded. My question was "Why are hair transplants dangerous for diffuse thinners?" His response:
There are other reasons why hair transplant may not be the best option for diffuse thinners. Many of these patients will thin in the donor area as well (diffuse unpatterned alopecia, for example). This is a recipe for disaster. If we harvest from the donor area extensively and it then thins, one appears bald even in the back and on the sides.
If the thinning is in the area defined as normally "at risk", then hair transplant can cause shock loss. However, hairs lost to shock effect, which were already extensively miniaturized were essentially "on their way out" anyway. Stong, terminal hairs which succumb to shock loss will very often grow back in a few months.
A lot of this really depends upon the exact diagnosis. A consultation, and possibly other work-up, sometimes including scalp biopsy, is in order, so that the true nature of the hair loss pattern and its causative factors may be obtained.