low ear position
Introduction
Introduction The low position of the ear is a special appearance of the trisomy 21. The position of the ear is lower than that of the normal person. The upper part of the ear is curved toward the inside, and the whole ear looks round and has a low position. Down's syndrome, the 21-trisomy syndrome, also known as congenital or Down syndrome, is a disease caused by chromosomal abnormalities (an extra chromosome 21). 60% of children have abortion in the early stage of the fetus, and the survivors have obvious intelligence backwardness, special face, growth and development disorders and multiple deformities.
Cause
Cause
This disease belongs to the special appearance of the trisomy 21 syndrome. Modern medicine has confirmed that the incidence of Down's syndrome is related to the age of maternal pregnancy. It is an abnormality of chromosome 21, and there are three types of three-body, translocation and chimerism. Older pregnant women and egg aging are important reasons for non-segregation.
Examine
an examination
Related inspection
Chromosome amniocytes culture chromosome examination
Generally, about 15 to 20 weeks of pregnancy, a chromosomal examination of venous blood can determine whether the disease is sick or not. This kind of examination can be carried out in a general obstetrics and gynaecology hospital. If the diagnosis is at high risk, amniocentesis can be used to extract amniotic fluid for more accurate examination, but it has certain risks.
Diagnosis
Differential diagnosis
Differential diagnosis:
1. Ear augmentation: Patients with Barth Syndrome have a special face, large head, prominent forehead, face with triangular auricles, large eyes, and drooping mouth. The clinical manifestations of this disease are complex and diverse, with hypokalemia symptoms. During the fetal period, Bartter syndrome is characterized by intermittent episodes of polyuria. During the 22-24 weeks of pregnancy, there is too much amniotic fluid. It is necessary to repeatedly take amniotic fluid to prevent premature birth.
2, ear circumference depression: facial features of children's Digeol syndrome include long face, spherical tip and narrow nose, cleft palate, flat humerus, widened eye distance, squinting, low lop ear and ear sag And the jaw is too small. Facial features include long face, spherical tip and narrow nose, cleft palate, flattened humerus, widened eye, squinted eyes, low lop ear with occlusion of the ear and dysplasia of the auricle and hypomandible. Other rare body abnormalities include microcephaly, short stature, slender toe, inguinal hernia, and scoliosis.
3, the earlobe is too large is a clinical manifestation of the earlobe deformity, earlobe deformity is generally divided into earlobe adhesion, ear lobes, earlobe too large or missing. The earlobe deformity is usually not very eye-catching and can often be covered with hair, which is only noticed when the earlobe is noticed when intentionally or unintentionally.
