The rheumatoid swan-neck deformity. Surgical Treatment of Swan Neck Deformity in Rheumatoid Arthritis. Some medical experts call it a Swan neck deformity or a 90°-angle deformity. Swan neck deformity is caused by abnormal stress on the volar plate, the ligament around the middle joint of the finger (PIP joint). swan neck deformity: [swän] Etymology: D, zwaan + AS, hnecca, neck; L, deformis, misshapen 1 also called zig-zag. Swan-neck deformities associated with rheumatoid disease are characterized by hyperextension of the PIP joint and concurrent MCP and DIP flexion deformities. A swan-neck or boutonniere deformity occurs in approximately half of patients with rheumatoid arthritis. This is a result of an imbalance of the extensor mechanism of the digit. The volar plate is torn, causing the joint toopen abnormally under the pull of the extensor ligaments . The resulting shape of the finger looks similar to a swan's neck, which is how the condition got its name. Reciprocal flexion of the metacarpal phalangeal joint (MCP) can also be present. Swan neck deformity is a progressive and disabling condition that commonly affects rheumatoid arthritic hands. Symptom. Symptoms of swan neck deformity include. The Swan neck deformity can also be called as duck-bill in which the finger gets the zigzag structure. Swan-Neck and Boutonnière deformities are conditions affecting the proximal interphalangeal joint (PIPJ) – this is really their only similarity.. Their main differences are related to clinical findings, mechanics, pathophysiology, classification and treatments. One at time, slowly bend your fingers to touch the middle of your palm. The patient has given full written consent for the filming and use of this video on YouTube. Swan neck deformity; Jammed finger; Jersey finger; Trigger finger; Ring avulsion injury; De Quervain tenosynovitis; Infiltrative tenosynovitis; Metacarpophalangeal ulnar ligament rupture (Gamekeeper's thumb) Hand Dupuytren contracture; Wrist Drummer's wrist; Ganglion cyst; Lunotriquetral … the middle knuckle bending backward (hyperextends) and the fingertip bending down towards the palm, Here is an example of how a simply designed orthosis can have an incredible impact on improved functionality for the patient with a hyperextension deformity of the PIP joint, known as a swan neck deformity. This exercise promotes joint health and flexion in your fingers. But, in fact, there is a backward curve called lordosis that helps keep the head and neck in perfect alignment. Swan neck deformity is characterized by proximal interphalangeal (PIP) joint hyperextension and flexion of the distal interphalangeal (DIP) joint. Swan neck deformity is a musculoskeletal manifestation of rheumatoid arthritis presenting in a digit, with the combination of:. The imbalance could be due to … Swan neck deformity is a deformed position of the finger, in which the joint closest to the fingertip is permanently bent toward the palm while the nearest joint to the palm is bent away from it (DIP flexion with PIP hyperextension). hyperextension of a proximal interphalangeal (PIP) joint; flexion of a distal interphalangeal (DIP) joint; Pathology. In the finger, it causes a characteristic deformity in which the middle finger joint (called the PIP joint) hyperextends, and the fingertip joint (called the DIP joint) bends downward. There is also reciprocal flexion noted of the metacarpophalangeal (MCP) joint. Swan neck deformity with a stiff PIP joint sometimes requires replacement of the PIP joint, called arthroplasty. 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