From my clinical experience with PDT , it did not happened that patients will have alopecia . There is very minimal risk that the PDT will destroy hair follicle .
Risks are very small following PDT
Risk of permanent hair loss is v v v small. The reported cases were probably secondary to destruction of the skin cancers that destroyed the hair follicles. ALA and the blue light does not penetrate deep enough to cause destruction, so PDT is safe in this regard.Dr Davin Lim Brisbane, Australia.