TY - CHAP M1 - Book, Section TI - The Porphyrias A1 - Lichtman, Marshall A. A1 - Kaushansky, Kenneth A1 - Kipps, Thomas J. A1 - Prchal, Josef T. A1 - Levi, Marcel M. PY - 2011 T2 - Williams Manual of Hematology, 8e AB - The porphyrias are inherited or acquired disorders in which the activity of an enzyme in the heme biosynthetic pathway is altered. Metabolic intermediates are produced in excess, initially either in the marrow or the liver, and result in neurologic or photocutaneous symptoms and signs. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/18 UR - hemonc.mhmedical.com/content.aspx?aid=1126651969 ER -