Porphyria Cutanea Tarda (PCT) is the most common form of porphyria.  The disease develops in midlife with a mean age of 45 years at onset.  It is characterized by photosensitivity (sensitivity to sun exposure) resulting in bullae (blisters), milia, and scarring.  The dorsal hands and forearms, ears and face are primarily affected. The bullae are… Read more »