Couldn't find the full form or full meaning of Q4? Maybe you were looking for one of these abbreviations: q2c - q2h - q2s - q3 - q3w - q4-8h - q4d - q4l - q4pm - q8
Von Willebrand disease is a hereditary disorder. It is caused by an abnormal gene. Each cell of the body contains structures called chromosomes. A chromosome is a long chain of chemicals known as DNA. This DNA is arranged into about 25,000 units called genes which determine such things as the colour of a personâs eyes. Each cell contains 46 of these chromosomes arranged in 23 pairs. Von Willebrand disease is caused by a defect on chromosome 12. The defect could be on the chromosome 12 from the mother, on the chromosome 12 from the father, or on both. There are two ways of getting the hereditary form of VWD.
Types of Von Willebrand Disease: 1  Type 1 â von Willebrand levels are lower than normal. 2  Type 2 â there is a defect in the structure of the von Willebrand protein that causes lower than normal VW factor protein activity.  Type 2a â the level of VW factor is reduced, as is the ability of platelete to clump together.