Hepatic porphyrias.

The underlying cause of all porphyrias is a defective enzyme important to the heme biosynthesis pathway. Porphyrias are inheritable conditions.

The repetition in the poem Porphyrias Lover is "that moment she was mine, mine".

The erythropoietic porphyrias and porphyria cutanea tarda are considered to be chronic conditions.

The porphyrias are disorders in which the body produces too much porphyrin and insufficient heme (an iron-containing nonprotein portion of the hemoglobin molecule).