Marfan syndrome, also known as Marfan syndrome, is an autosomal dominant connective tissue disorder, which is characterized by lesions of the cardiovascular system, skeletal and muscular systems, and the eye. 1. Cardiovascular system lesions: aortic aneurysm and aortic coarctation are more common, in which aortic aneurysm rupture, the patient will experience severe chest pain. People with mitral valve prolapse and mitral valve insufficiency may have ischemic manifestations such as pallor, weakness, dyspnea and cyanosis. People with aortic dissection may have fever and panic attacks. 2. Skeletal and muscular system lesions: there may be chicken breast, spinal deformity, flat feet, low muscle tone, ligament or tendon elongation and laxity. There are also patients with long and thin face, sunken eyes, round forehead, high stature, elongated trunk, elongated limbs and fingers (toes), and inappropriate proportions of the trunk and limbs. 3. Ocular lesions: this phenomenon mostly occurs in male patients, commonly due to the lens suspensory ligament rupture or relaxation and bilateral lens dislocation, there are also patients with changes in the angle of the eye room. Due to individual differences, the specific manifestations of different patients may also have differences, consider the Marfan syndrome patients, timely medical consultation.