delayed bone age
Introduction
Introduction Human growth and development can be expressed by two "ages", namely, age of life (calendar age) and biological age (bone age). Bone age is an abbreviation for bone age and is determined by means of a specific image of the bone in X-ray imaging. When understanding the bone age of a person, it is usually necessary to take an X-ray film of the left wrist of the person. The doctor observes the development degree of the ossification center of the left phalanx, the wrist bone and the lower end of the ulna by X-ray film to determine the bone age. The biological age (bone age) - the difference in living age within ± 1 year is called normal development. Biological age (bone age) - the difference in living age > 1 year is called developmental advancement (abbreviation: precocious). Biological age (bone age) - the difference in living age <1 year old is called developmental backwardness (abbreviation: late maturity).
Cause
Cause
Abnormal bone age is often an aspect of certain endocrine diseases in pediatrics. Many diseases will affect bone development, or advance or make it fall behind. X-ray film is used to observe the development of the ossification center of the left hand phalanx carpal bone and the lower end of the ulna, such as adrenal hyperplasia or tumor, Alreb-ert syndrome, Precocious puberty, hyperthyroidism, ovarian granulosa cell tumors, etc. will lead to early bone age; and ovarian hypoplasia (Turner syndrome), achondroplasia, hypothyroidism, etc. will lead to significant backward bone age.
Examine
an examination
Related inspection
Growth hormone general film examination
First, the child is short stature, bone age and age of life are the same, which is also considered normal development; second, the child's bone age is less than the age of life, which is the child's growth and development abnormalities, and there are many reasons for this abnormality. After determining the cause, you can treat the symptom. The main performance is short stature, primary short stature, family hereditary short stature, intrauterine growth retardation and constitutional puberty dysplasia. Clinical identification has certain difficulties. Measuring bone age, predicting adult height and combining with medical history can help Diagnosis; primary short stature, family hereditary short stature, normal bone age, predicting lower adult height, but the predicted height of adult height in children with hereditary short stature is within the genetic height range; intrauterine growth retardation is low bone age. Adult height is also short, combined with medical history, can be diagnosed in early childhood, constitutional puberty retardation bone age is backward, bone age is basically the same as height, and the predicted height of adult height is not low.
Diagnosis
Differential diagnosis
Delayed symptoms of bone age should be differentiated from abnormally short symptoms.
Abnormally short: In life, each person's height is different, some are tall, some are short, but regardless of height, as long as the body shape is symmetrical, that is, the structure of each part of the body is well-proportioned, it should be regarded as normal. If the abnormality is tall or abnormal, or the family is high, everyone is high, only you can be considered sick.
First, the child is short stature, bone age and age of life are the same, which is also considered normal development; second, the child's bone age is less than the age of life, which is the child's growth and development abnormalities, and there are many reasons for this abnormality. After determining the cause, you can treat the symptom. The main performance is short stature, primary short stature, family hereditary short stature, intrauterine growth retardation and constitutional puberty dysplasia. Clinical identification has certain difficulties. Measuring bone age, predicting adult height and combining with medical history can help Diagnosis; primary short stature, family hereditary short stature, normal bone age, predicting lower adult height, but the predicted height of adult height in children with hereditary short stature is within the genetic height range; intrauterine growth retardation is low bone age. Adult height is also short, combined with medical history, can be diagnosed in early childhood, constitutional puberty retardation bone age is backward, bone age is basically the same as height, and the predicted height of adult height is not low.
