A U wave as seen on ECG. An electrocardiogram of an 18-year-old man showing U waves, most evident in lead V3. The U wave is a wave on an electrocardiogram that is not always seen. It is typically small, and, by definition, follows the T wave. U waves are thought to represent repolarization of the papillary muscles or Purkinje fibers.
HCP is caused by mutations in the CPOX gene, which codes for the enzyme coproporphyrinogen oxidase. This enzyme is responsible for the sixth step in the heme biosynthetic pathway, converting coproporphyrinogen III to protoporphyrinogen IX.
Top 10 Doctor insights on: Dcis Breast Cancer Genetic. 1 Is dcis breast cancer genetic? It can be: Dcis, the earliest form of breast cancer, can be associated with brca mutations. 13% of women under 50 diagnosed with dcis had a brca mutation in retrospective (looking backwards) studies. Women with a family history of breast or ovarian cancer or dcis before age 50 should have genetic counseling. For more info: http://clincancerres.Aacrjournals.Org/content/13/14/4306.Full.