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Why store cord tissue?
Like cord blood, the umbilical cord itself is a rich source of stem cells. However, they are a different population of stem cells, which immediately suggests there is value to storing both the cord blood stem cells and the cord tissue stem cells. While most of the stem cells in cord blood are blood-forming or hematopoietic stem cells (HSC), most of the stem cells in cord tissue are mesenchymal stem cells (MSC). The MSC are not distributed uniformly in the cord, but are mostly clustered around the walls of the blood vessels. The typical umbilical cord is estimated to hold 11 million progenitor cells per gram of tissue.
Schugar RC et al. 2009; Journal of Biomedicine and Biotechnology 2009:789526 (open access) doi:10.1155/2009/789526