A 14-year-old girl is being examined by a pediatrician. Objectively, she has a tall stature, asthenic body type, striae on the skin of the abdomen, blue sclera. She was diagnosed with a scoliotic posture and chest deformity. She has hypermobile joints; her fingers and arms are long. Cardiac ultrasound visualizes a mitral valve prolapse. What is the most likely because of her tall stature?