The part of the sternum that protrudes forward is called a chicken breast. Chicken breast is a common chest deformity, which is generally considered to be funnel chest deformity related to heredity. Most people think that most chicken breasts, like pectus excavatum, are discovered after birth, and are often gradually noticed after five or six years old. Chicken breasts generally have few symptoms of oppressing the heart and lungs. Severe chicken breasts often have repeated upper respiratory tract infections and bronchial wheezing, poor activity endurance and easy fatigue. More importantly, patients have a great mental burden because of deformity. The chicken breast is opposite to the funnel chest, and the sternum protrudes forward. There are generally two kinds. The first is the common sternal protrusion, that is, the lower part of the sternum moves forward more obviously than the upper part. The attachment of xiphoid process is often the most prominent. The longitudinal surface of the pectoral muscle is arched, and the 4-8 costal cartilage on both sides is in the shape of a deep groove parallel to the sternum, which makes the protruding part more obvious, just like a giant hand grasping the sternum and crushing the costal cartilage on both sides. Another kind of chicken breast is rare. The costal cartilage of the sternum stalk, the upper part of the sternum body and the upper chest protrude forward, the middle part of the sternum body bends backward, and the lower part of the pectoral muscle protrudes forward. The sagittal plane of the sternum is Z-shaped, and the costal cartilage on both sides is also depressed inward. Therefore, some people call this deformity overgrowth of rib and costal cartilage, and sternal deformity is secondary to rib deformity. Most chicken breasts are not found immediately after birth like pectus excavatum, and are often gradually noticed after five or six years old. Chicken breasts generally have few symptoms of oppressing the heart and lungs. Severe chicken breasts often have repeated upper respiratory tract infections and bronchial wheezing, poor activity endurance and easy fatigue. More importantly, patients have a great mental burden because of deformity. The chicken breast is opposite to the funnel chest, and the sternum protrudes forward. There are generally two kinds. The first is the common sternal protrusion, that is, the lower part of the sternum moves forward more obviously than the upper part. The attachment of xiphoid process is often the most prominent. The longitudinal surface of the pectoral muscle is arched, and the 4-8 costal cartilage on both sides is in the shape of a deep groove parallel to the sternum, which makes the protruding part more obvious, just like a giant hand grasping the sternum and crushing the costal cartilage on both sides. Another kind of chicken breast is rare. The costal cartilage of the sternum stalk, the upper part of the sternum body and the upper chest protrude forward, the middle part of the sternum body bends backward, and the lower part of the pectoral muscle protrudes forward. The sagittal plane of the sternum is Z-shaped, and the costal cartilage on both sides is also depressed inward. So some people call this deformity funnel chest. Most chicken breasts, like pectus excavatum, are discovered after birth, and are often gradually noticed after five or six years old. Chicken breasts generally have few symptoms of oppressing the heart and lungs. Severe chicken breasts often have repeated upper respiratory tract infections and bronchial wheezing, poor activity endurance and easy fatigue. More importantly, patients have a great mental burden because of deformity. The chicken breast is opposite to the funnel chest, and the sternum protrudes forward. There are generally two kinds. The first is the common sternal protrusion, that is, the lower part of the sternum moves forward more obviously than the upper part. The attachment of xiphoid process is often the most prominent. The longitudinal surface of the pectoral muscle is arched, and the 4-8 costal cartilage on both sides is in the shape of a deep groove parallel to the sternum, which makes the protruding part more obvious, just like a giant hand grasping the sternum and crushing the costal cartilage on both sides. Another kind of chicken breast is rare. The costal cartilage of the sternum stalk, the upper part of the sternum body and the upper chest protrude forward, the middle part of the sternum body bends backward, and the lower part of the pectoral muscle protrudes forward. The sagittal plane of the sternum is Z-shaped, and the costal cartilage on both sides is also depressed inward, so some people call this deformity funnel chest. [1] Edit the type of this paragraph Clinically, according to the different shapes of sternum, chicken breasts can be divided into three types: chicken breast 1, boat-shaped chest, in which the sternum is mainly elongated, protruding forward, and bilateral inferior costal cartilage is depressed, which looks like the keel of a ship, and in severe cases, the chest volume is reduced. On the lateral X-ray film, the ribs were separated from the sternum, and the posterior sternal space was prolonged. 2. Spherical pigeon breast The spherical pigeon breast is characterized by the bulge of the sternal stalk, the sternal body and the adjacent costal cartilage. If sternal angle decreases, the sternum will sink, and the second to fifth costal cartilages will bulge beside the sternum. Spherical pigeon breasts are often accompanied by sternal ossification lines, especially the early ossification at the junction of sternal stalk and sternal body, which can be seen before the child is 3 years old or even 3 years old. Generally speaking, 99% people, regardless of age, have an open connection between the sternal stalk and the sternal body. The ossification of the connection between the sternum stalk and the body and the uplift of sternal angle are called "sternal angular bone connection". 3. One-sided chicken breast One-sided chicken breast is also called asymmetric chicken breast, which shows that one side of the chest wall protrudes, sometimes accompanied by the opposite side of the subsidence. Costal cartilage malformation plays an important role in this type, and the abnormal position of sternum is not obvious. [2] The reason for editing this paragraph is that the chicken breast is a wedge-shaped protrusion on the front wall of the chest, which looks like the sternum of birds, hence the name. The causes of this deformity are: X-ray chest film 1, congenital dysplasia, unbalanced development of sternum, spine and ribs in fetus or infant, which leads to chest deformity. 2. Malnourished infants do not get enough nutrition after birth, and suffer from some malnutrition diseases, such as rickets in children, which can affect the sternum development for a long time and cause thoracic deformity. 3. Secondary thoracic diseases. For example, some congenital heart diseases, the enlarged heart compresses the chest wall, forming a chicken breast deformity. Flat chest deformity caused by chronic empyema. Generally, mild thoracic deformity has little effect on human physiological function, so preventive measures should be taken to prevent it from continuing to develop. For example, chest deformity is more serious, especially funnel chest. The heart and lungs in the chest are compressed to varying degrees, and even the heart is displaced, and the pulmonary ventilation function is also affected. If it develops further, it is easy to have serious diseases such as respiratory tract infection. The diagnosis of pectus excavatum and chicken breast should pass chest examination. In order to determine whether there are indications for surgical treatment, necessary chest X-ray examination and determination of heart and brain function should be carried out. Cases of pectus excavatum and chicken breast complicated with severe cardiopulmonary dysfunction are rare. Children with slight deformities can be corrected with age and physical development. This situation does not need special treatment, and can be observed after 3-5 years old. Attention should be paid to the prevention and treatment of primary rickets. For children with severe deformity, especially children with pectus excavatum complicated with severe cardiopulmonary dysfunction, surgical treatment should be given. This kind of operation should be treated by experienced doctors in specialized hospitals. Edit this paragraph pathological chicken breast chicken breast malformation is generally considered to be funnel chest malformation related to heredity. Most people think that it is caused by the overgrowth of ribs and costal cartilage, and sternal deformity is secondary to rib deformity. Some people think it is related to the abnormal development of diaphragm attachment. The front of diaphragm is undeveloped, not attached to xiphoid process and rib arch, but attached to the back rib arch of rectus abdominis sheath, but attached to the back of rectus abdominis sheath. When inhaling deeply, the upper part of rectus abdominis is pulled inward, and the muscles of the overgrown lateral part of diaphragm contract, which makes Hausdorf deeper, while the lower part of sternum moves forward without diaphragm support, resulting in chicken breast deformity. Others believe that chicken breast deformity is related to repeated chronic respiratory infections. Long-term chronic respiratory infection reduces lung tissue compliance and respiratory function. In order to meet the needs of breathing, the diaphragmatic movement is strengthened, which leads to Hausdorf invagination and gradually forms chicken breast deformity. [1] Editing this paragraph, the incidence of clinical diagnosis of chicken breast is lower than that of funnel chest, and the clinical symptoms are mild, which is not paid much attention to by patients and their families. Slight chicken breast is often untreated, while heavier chicken breast is obviously deformed, which is easy to be diagnosed clinically. Lateral X-ray chest film can clearly show the abnormal situation of sternum, and other examination methods often have no abnormality. 【 The treatment of chicken breast also requires surgery.