Humero-radio-ulnar synostosis is a rare congenital condition in which the humerus (upper arm bone), radius (forearm bone), and ulna (forearm bone) are fused together. This fusion can cause a variety of problems, including limited range of motion in the elbow, forearm, and wrist, as well as deformities of the hand and fingers. Treatment typically involves surgery to separate the bones and restore normal range of motion.

The most common symptoms of humero-radio-ulnar synostosis include:

-Pain and swelling in the elbow
-Limited range of motion in the elbow
-Decreased strength in the elbow
-A visible lump or bump in the elbow
-A feeling of instability in the elbow
-A clicking or grinding sensation when moving the elbow

Humero-radio-ulnar synostosis is a rare congenital condition in which the humerus, radius, and ulna bones of the forearm fuse together. The exact cause of this condition is unknown, but it is believed to be due to genetic mutations or environmental factors. Possible causes include chromosomal abnormalities, exposure to certain medications or toxins, and radiation exposure.

1. Surgery: Surgery is the most common treatment for humero-radio-ulnar synostosis. During the procedure, the surgeon will remove the fused bones and replace them with a prosthetic joint.

2. Physical Therapy: Physical therapy can help to improve range of motion and strength in the affected arm.

3. Occupational Therapy: Occupational therapy can help to improve the ability to perform daily activities.

4. Bracing: Bracing can help to provide support and stability to the affected arm.

5. Medications: Non-steroidal anti-inflammatory drugs (NSAIDs) can help to reduce pain and inflammation.

1. Genetic predisposition
2. Previous trauma to the elbow
3. Previous elbow surgery
4. Prolonged immobilization of the elbow
5. Inflammatory conditions such as rheumatoid arthritis
6. Congenital syndromes such as Apert syndrome, Crouzon syndrome, and Pfeiffer syndrome

At this time, there is no known cure for humero-radio-ulnar synostosis. Treatment typically involves surgery to separate the fused bones and restore normal joint movement. Depending on the severity of the condition, medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) may be prescribed to reduce pain and inflammation. Physical therapy may also be recommended to help improve range of motion and strength.