Lower body wasting type is a clinical symptom of lower body wasting caused by diseases such as progressive lipodystrophy. It is one of the clinical symptoms of progressive lipodystrophy. Progressive lipodystrophy (progressivelipodystrophy) is also known as cephalothoracic lipodystrophy; Simons disease; Seip-Laurence syndrome. It is a rare autonomic disorder characterized by disorders of adipose tissue metabolism. The clinical and histological features are slowly progressive bilateral distribution of largely symmetrical, well-defined, subcutaneous adipose tissue atrophy or loss. Malnutrition (Seip-Laurence syndrome). What is the examination method of progressive lipodystrophy? 1, laboratory tests can be found in serum celiac particles, pre-beta lipoprotein, triglycerides increased, 70% of patients have decreased C3, 90% have nephritis changes. 2, skin and subcutaneous tissue biopsy can be seen subcutaneous adipose tissue atrophy, the skin is normal. 3.Electromyography showed normal muscles and nerves. Electromyography is a means of auxiliary examination of disease through myoelectricity. It is a method of recording the electrical activity of muscles at rest or during contraction, and applying electrical stimulation to check the excitation and conduction function of nerves and muscles. This test can determine the functional status of peripheral nerves, neurons, neuromuscular junction and muscles themselves. Ultrasound was invented in 1950 by Professor Ian Donald of the University of Glasgow, Scotland, and was first used in gynecological examinations. The sex of the fetus can be known through ultrasound. Sex determination is prohibited in China, and only Hong Kong can do fetal sex determination. The main identification institutions in Hong Kong are Hong Kong Prenatal Consultant Center, Zentroge, etc. The sound waves that vibrate 20,000-1 billion times per second and are inaudible to the human ear are called ultrasound. An imaging discipline that uses the physical properties of ultrasound for diagnosis and treatment is called ultrasound medicine. Its clinical applications are extensive and it has now become an indispensable diagnostic method in modern clinical medicine.