The last finger is short and curved inward or only has two knuckles

Introduction The short finger is bent inward or only the two knuckles are clinical symptoms of mental retardation. Mental retardation: refers to a group of diseases characterized by various factors such as genetic factors, environmental factors or psychosocial factors in the developmental stage before the age of 18, and the clinical manifestations are characterized by markedly low intelligence and defects in social adaptation. The etiology of mental retardation is complex and involves a wide range of factors, such as biological factors, psychosocial factors and other factors, which may lead to brain function development blockage or brain tissue damage.

Cause

The World Health Organization divides the causes of mental retardation into ten categories:

1 infection and poisoning.

2 trauma and physical factors.

3 metabolic disorders or malnutrition.

4 brain diseases (after birth).

5 due to unclear prenatal factors and diseases.

6 chromosomal abnormalities.

7 immature children.

Eight-fold mental disorder.

9 psychosocial deprivation, other and non-specific causes.

an examination

Related inspection

Fisher finger test little finger abduction test

The clinical manifestations of mental retardation are closely related to the degree of mental retardation, as well as its special extrinsic features.

Special appearance: wide eye distance, upper eye angle of both eyes, inner suede, low ear position, low nose bridge, wide tongue, half of the mouth or tongue protruding out of the mouth, deep and wide tongue groove, thick palm The short finger is short, the short finger is often bent inward or has two knuckles, and 40% of the children have a penis. In the sacral pattern, the sacral side of the ball area of the big toe is arched, the distance between the big toe and the second toe is large, the joint ligament is loose or the muscle tension is low.

Differential diagnosis

1, multi-finger malformation: more common, caused by heredity, surgical treatment with surgical resection, multi-finger on the ulnar side of the small finger, when there is more than the metacarpal bone should be removed together.

2, and refers to deformity: very common, often hereditary, can be combined with missing fingers, short fingers, multiple fingers and pectoralis major lack of deformity, treatment using surgical methods, attention to flap design during surgery, sometimes need twice Or multiple surgical repairs.

3, giant finger deformity: less common, more common to the thumb, food, middle finger, non-hereditary, can be combined with neurofibromatosis, lymphangioma or hemangioma, and refers to multiple deformities, the treatment is too long When the thumb interferes with the function, it can be shortened so that it can be pointed at the finger, the food and the middle finger are too ugly to be cut off, and the corresponding metacarpal bone is removed. The clinical manifestations of mental retardation are closely related to the degree of mental retardation, as well as its special extrinsic features.

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