Why in this quest answer is not erythropoetic Porphyria?

Why in this quest answer is not erythropoetic Porphyria ?

No

Congenital erythropoietic protoporphyria is correct.

Hints

  • Begins in childhood

  • Formation of blisters due to severe photosensitivity

  • Classical reddish discolouration; as seen in the image

Image is characteristic of CEP deficiency of Uroporphyrinogen synthase ,it is inherited AR