erythropoietic protoporphyria


n.

A benign inherited disorder of porphyrin metabolism characterized by enhanced fecal excretion of protoporphyrin and elevated concentration of protoporphyrin in red blood cells, plasma, and feces, with acute solar urticaria or chronic solar eczema appearing quickly upon exposure to sunlight.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.