Pityriasis Lichenoides Chronica and Hair Loss?

I have been diagnosed with Pityriasis lichenoides chronica which I have had since I was 15. About the same time my hair started thinning. I am now in my mid 30s and I have general thinning (no hairline recession) from the crown to the front. Both sides and the back of my head is fully thick. I have started propecia and minoxidil.

Is there any connection between the PLC and my hair loss?

I have no personal experience with pityriasis lichenoides chronica (PLC), but as I understand it, there’s not much known about the condition. How it relates to hair loss is unclear. For those readers that are curious, PLC “is characterised by the gradual development of symptomless, small, scaling papules that spontaneously flatten and regress over a period of weeks” (source: DermNet NZ).

What I do know is that the most common cause of hair loss in men is genetic male pattern baldness (MPB). It occurs in a pattern from crown to front as you describe, leaving the hair on the sides and back “fully thick”, as you also describe. It could be possible that you have PLC along with MPB and the two are unrelated.

It seems you need a good diagnosis and you cannot get that here on the Internet. You need to find a physician who can examine you and give you his assessment. A miniaturization study may be helpful as well and may point to the association of genetic male patterned hair loss if that is also present.