What is the role of hair transplantation for scarring alopecias like lichen planopilaris?   

The primary disorder needs to be under control before considering hair transplantation. I would suggest waiting at least a year after the disorder is under control and many suggest 2-5 years of stability before considering transplantation. Hopefully, in some areas, the scarring will be mild to moder...

I have seen HT appear to trigger LPP in several patients. I'd be very circumspect... perhaps do a test plug.

One year after full "stability" of disease - lack of symptoms, lack of clinical inflammation, lack of progression of hair loss. However, in my experience, patients are never fully stable. Patients should understand that the benefits of the transplant tend to be temporary, and most patients do eventu...