Congenital hypoplasia of thumb is a condition in which the thumb is underdeveloped or absent at birth. It is a rare condition that can be caused by genetic mutations, environmental factors, or a combination of both. Symptoms may include a small or missing thumb, webbing between the thumb and index finger, and difficulty with grasping and pinching. Treatment may include surgery, physical therapy, and occupational therapy.

The most common symptom of congenital hypoplasia of the thumb is a thumb that is smaller than normal and may be missing some of its parts. Other symptoms may include:

• A thumb that is shorter than the other fingers
• A thumb that is not fully developed
• A thumb that is not able to move or bend
• A thumb that is not able to grip objects
• A thumb that is not able to make a fist
• A thumb that is not able to touch the tip of the index finger
• A thumb that is not able to reach the palm of the hand

Congenital hypoplasia of thumb is a rare condition that is caused by a genetic mutation. It is believed to be caused by a mutation in the HOXD13 gene, which is responsible for the development of the thumb. Other causes may include environmental factors, such as exposure to certain chemicals or radiation, or a mother's health during pregnancy.

1. Splinting: Splinting is a common treatment for congenital hypoplasia of the thumb. A splint is a device that is used to immobilize the thumb and keep it in a certain position. This helps to prevent further damage to the thumb and can help to improve its function.

2. Surgery: Surgery may be recommended in some cases of congenital hypoplasia of the thumb. The type of surgery will depend on the severity of the condition and the age of the patient. Surgery may involve lengthening the thumb, reshaping the thumb, or reconstructing the thumb joint.

3. Physical Therapy: Physical therapy can help to improve the strength and range of motion of the thumb. Exercises may be prescribed to help improve the strength and flexibility of the thumb.

4. Occupational Therapy: Occupational

1. Family history of congenital thumb hypoplasia
2. Maternal exposure to certain medications or toxins during pregnancy
3. Maternal diabetes
4. Maternal smoking during pregnancy
5. Maternal alcohol consumption during pregnancy
6. Maternal age over 35
7. Maternal obesity
8. Maternal infection during pregnancy
9. Maternal malnutrition during pregnancy
10. Maternal exposure to radiation during pregnancy

There is no cure for congenital hypoplasia of the thumb, but there are treatments available to help improve the function of the thumb. These treatments include physical therapy, splinting, and surgery. Medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) may also be prescribed to reduce pain and inflammation.