![]() ![]() A normal triscaphoid joint on the left, with an arthritic joint on the right. In arthritis, the cartilage is lost, and therefore the gap between the bones appears diminished. The gap seen on X-rays between bones is not a real gap – it is filled with smooth cartilage (the lining of the joint) in order to allow smooth movement. The diagnosis of tri-scaphoid arthritis is made from the symptoms and signs, and is confirmed on an X-ray of the wrist. Tenderness over the joint is also common. ![]() Sometimes a small fluid filled lump (a ganglion) appears over the joint. ![]() Swelling may be seen in the area of the joint. This type of arthritis is commonly associated with arthritis at the thumb base, and pain may be evident from the thumb base joint too. Pain is worse on activity using the hand, and generally relieved by rest. The pain is usually located on the palm and thumb side of the wrist. The majority of patients with tri-scaphoid osteoarthritis also have base of thumb arthritis. Arthritis in this joint is relatively uncommon compared to arthritis at the base of the thumb, but affects around 8% of women over the age of 50. The joint is important because it provides a strong and stable link between the two rows of bones in the wrist, and transmits force from the thumb across the wrist joint. The triscaphoid joint is located within the wrist joint, and involves the scaphoid, trapezium and trapezoid bones. ![]()
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