Generally, hand and foot deformities can be seen at a glance, such as floating bunions, polydactyly, syndactyly, etc. You may not know at first glance which congenital hand and foot deformity it is, but you can surely detect that it is different from normal hands and feet. However, there is one type of congenital hand and foot deformity that many parents may not be able to recognize, or may have difficulty in detecting, so that they may miss the best time to treat their children. This is “amniotic band syndrome”. Amniotic Bundle Syndrome (ABS) is characterized by obvious ring-like narrowing of the limbs (fingers), some of which are very similar to infantile hypertrophy, and if you don’t have a clear understanding of ABS, it is easy to confuse them. What is amniotic band syndrome? It is generally recognized as a narrowing of the amniotic bands that occurs when the bands become entangled and prevent the normal development of the limb part of the body. Shallow narrowing rings only reach the skin and subcutaneous tissues; deep narrowing rings not only involve the skin and subcutaneous tissues, but also deeper structures including veins and lymphatic vessels can be compressed and lead to distal limb edema, and in severe cases, can lead to necrosis of the distal limb, which can be very dangerous for the child. So how should new parents tell the difference? 1, you can put the affected area of the folds of the part of the dial to see if it is a whole circle? Can the folds reduce or disappear as the skin stretches? This is because amniotic band syndrome is usually a full circle and does not decrease or disappear with skin extension. 2.You can press the skin of the affected area to see if it is soft or hard. If it is hard to touch, we should be alert to the possibility of amniotic banding syndrome.