photoderm and porphryas

Question 1

what does SPT (skin phototype scale) measure?

Answer 1

I to IV (sometimes V and VI are added) how much they tan/ burn

Skin phototype I burns the most and IV tans the most

Question 2

which site involvement is a clue to cutaneous photosensitivity?

Answer 2

retroauricular

Question 3

what are the two steps for diagnosing porphyria cutanea tarda (PCT)?

Answer 3

1) diagnosis of PCT

2) diagnosis of the cause (s) of PCT