Scaphoid Lunate Advanced Collapse (SLAC) describes the specific pattern of degenerative arthritis seen in chronic dissociation between the scaphoid and lunate. Diagnosis is made clinically with progressive wrist pain and wrist instability with radiographs showing advanced arthritis of the radiocarpal and midcarpal joints (radiolunate joint spared).
Summary Scaphoid Nonunion Advanced Collapse (SNAC) describes the specific pattern of progressive arthritis of the wrist that results from a chronic scaphoid nonunion. Diagnosis is made clinically with progressive wrist pain and wrist instability with radiographs showing scaphoid fracture nonunion with advanced arthritis of the radioscaphoid joint.
Scapholunate advanced collapse (SLAC) is a characteristic degenerative clinical wrist condition of progressive deformity, instability, and arthritis that affects the radiocarpal and mid-carpal joints of the wrist.
SNAC of the left wrist caused by a displaced fracture of the distal pole of the scaphoid is reported with ICD-10-CM code S62.012K Displaced fracture of distal pole of navicular (scaphoid) bone of left wrist, subsequent encounter for fracture with nonunion.
Scapholunate advanced collapse (SLAC) is a characteristic degenerative clinical wrist condition of progressive deformity, instability, and arthritis that affects the radiocarpal and mid-carpal joints of the wrist.
Scaphoid non-union advanced collapse (SNAC) is a complication that can occur with scaphoid fractures, specifically non-union of scaphoid fractures. It is essentially the same sequela of wrist injury causing scapholunate dissociation as seen in scapholunate advanced collapse (SLAC).
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KeywordsSynonymsDegenerative arthritis of the wrist Osteoarthritis of the wrist Post-traumatic arthritis of the wrist SLAC wrist SNAC wristICD-10 CodesM19.031Primary osteoarthrosis, right wristM19.032Primary osteoarthrosis, left wrist20 more rows•Jul 6, 2019
The lunate is a crescent-shaped carpal bone found within the hand. The lunate is found within the proximal row of carpal bones. Proximally, it abuts the radius.
Stage III SLAC wrist. PA radiograph shows sclerosis and joint space narrowing between the lunate and capitate, and the capitate will eventually migrate proximally into the space created by the scapholunate dissociation.
The scapholunate joint is a small joint between two carpal bones at the wrist crease, namely the scaphoid and lunate bones. The scapholunate joint is very important for the stability of the wrist joint. It is often injured during sport, for example, if you fall heavily onto your hand.
The scaphoid bone is one of the carpal bones on the thumb side of the wrist, just above the radius. The bone is important for both motion and stability in the wrist joint. The word "scaphoid" comes from the Greek term for "boat." The scaphoid bone resembles a boat with its relatively long, curved shape.
Predynamic, or occult, injury is the mildest form of the scapholunate ligament tear. It is a partial tear of the ligament. X-rays are normal, but the partial tear may be visualized by an MRI or by looking in the joint with an arthroscope at the time of surgery.
CAUSES. Most cases of SLAC wrist start with a significant wrist sprain or fracture, but occasionally no history of injury is recalled. Some cases of scapholunate ligament injury may be due to repetitive heavy loading of the wrist as seen with obesity, or inflammatory conditions of the wrist that damage the ligament.
SLAC wrist is commonly (26 % of the time) seen in patients with CPPD arthropathy [2]. The pathogenesis is pyrophosphate deposition in the interosseous ligaments (scapholunate) leading to ligament laxity and disruption and thus rotational alteration of the scaphoid.
Scaphoid Nonunion Advanced Collapse (SNAC) describes the specific pattern of progressive arthritis of the wrist that results from a chronic scaphoid nonunion.
De Quervain’s disease (radial styloid tenosynovitis) is an inflammation of the first dorsal extensor compartment; this is entrapment tendinitis causing tendon thickening, which leads to restricted motion and a grinding sensation with tendon movement (crepitus).
A wrist defect often requiring surgical intervention is scapholunate advanced collapse (SLAC.) SLAC is a condition of progressive instability that causes advanced radiocarpal and midcarpal osteoarthritis. SLAC describes a specific pattern of progressive subluxation with loss of articulation between the scaphoid and lunate bones. SLAC usually results from trauma to the wrist, but may be caused by a degenerative process such as calcinosis or as a sequela of a prior injury. SLAC is estimated to account for more than half of all non-traumatic wrist osteoarthritis cases.#N#Signs and symptoms of SLAC include: