Taber’s Cyclopedic Medical Dictionary Online + Mobile powered by Unbound Medicine. Find 65,000 medical and nursing definitions. Download to iPhone, iPad, and Android. Explore these free sample topics:
-- The first section of this topic is shown below --
[porphyro- + -ia]
A group of disorders that result from a disturbance in any of the sequential steps involved in the synthesis of heme, causing increased formation and excretion of porphyrin or its precursors.