Indications The swan-neck deformity is characterized by proximal interphalangeal (PIP) joint hyperextension and distal interphalangeal (DIP) joint flexion. Swan-neck posturing is a result of tendon imbalance; the root cause can be at the wrist or at the metacarpophalangeal (MCP), PIP,…
Indications The extensor carpi ulnaris (ECU) tendon is stabilized within the ulnar groove by a fibro-osseus subsheath lying deep to the extensor retinaculum ( Fig. 38.1 ). Injury to the subsheath results in volar subluxation of the tendon around the…
Indications In rheumatoid arthritis patients, tendon rupture is a result of synovitis or attrition over a deformed bone. Common bony pathologies include caput ulnae syndrome (dorsal prominence of the ulna head leading to extensor tendon rupture; Fig. 37.1 ) and…
Indications Crossed intrinsic tendon transfer is indicated in patients with ulnar subluxation of the extensor tendon and passively correctable ulnar deviation of the digits because of rheumatoid arthritis (RA) or traumatic radial sagittal band rupture. The metacarpophalangeal (MCP) joint must…