PIK3CA-related overgrowth spectrum (PROS) is a group of rare syndromes that cause body parts to grow too much or have an unusual shape. Learn more about what causes PROS and the symptoms that come along with some of the syndromes.
Nucleic acids hold the basic building blocks for life. Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are found in all cells. DNA is organized into x-shaped chromosomes. In humans it is found in the nucleus of the cell.