Joints and Bones in MFS Posted By Alan Hakim, February 7, 2015 Joints and Bones in Marfan Syndrome A person with MFS typically has very distinct physical features. They are usually: tall, slim, disproportionately long limbed and long-fingered/toed, and flexible in their joints. The assessing clinician must measure the arm span, leg and torso length, and hand and foot length, and compare these to the individuals’ height. They will be looking for very specific disproportionate measurements that define the Marfanoid Habitus (see tab in section menu). It is very important to understand that the vast majority of people with a marfanoid habitus do not have MFS. As well as this body shape a person with MFS may have: a scoliosis (curvature of the spine), abnormal shape to the sternum (breast bone) with protrusion or indentation, a small jaw with over-crowding of the teeth, a high arch palate (roof of the mouth), flat feet, and early onset of osteoarthritis (wear and t