This bizarre shift of tissue systems, known as heterotopic ossification in most cases, can be brought on with spinal cord injury, amputation and even hip surgery. (scientificamerican.com)
Another coauthor from Penn Medicine, Frederick S. Kaplan, MD, the Isaac & Rose Nassau Professor of Orthopaedic Molecular Medicine and Chief of the Division of Molecular Orthopaedic Medicine, is a world expert in heterotopic ossification (HO), the abnormal buildup of bone that occurs in FOP. (sciencedaily.com)
Like all multiple pregnancies, heterotopic pregnancy is most common in couples who conceive with assisted reproductive procedures like in vitro fertilization (IVF). (verywellfamily.com)