Reduction defects are a type of congenital abnormality that affects the formation and development of the upper limb. These defects can range from minor anomalies to severe deformities that cause functional impairment. In addition to the more commonly known reduction defects such as amelia, meromelia, and phocomelia, there are other types of reduction defects that can occur in the upper limb.
Other reduction defects of the upper limb include symbrachydactyly, in which the fingers are shorter than normal, and polydactyly, in which there are extra fingers or thumbs. These defects can affect the function and appearance of the hand and may require surgical intervention to correct.
Overall, reduction defects of the upper limb can have a significant impact on an individual's quality of life. It is important to seek medical attention and treatment for these conditions to improve hand function and prevent further complications.