User:Opmed2013/Scapholunate advanced collapse

Scapholunate advanced collapse (also known as SLAC wrist) is a type of wrist osteoarthritis. SLAC wrist is the most common type of post-traumatic wrist osteoarthritis and is often the result of an undiagnosed and/or untreated scapholunate ligament rupture. The condition follows a predictable pattern of development, which was first described by H. Kirk Watson, M.D. and Frederick L. Ballet, M.D. in 1984.

Epidemiology
In their initial study, Watson and Ballet identified SLAC wrist as the most common form of wrist osteoarthritis, occurring in 57% of 210 patients with wrist osteoarthritis. SLAC wrist is more common in males, manual laborers, young people, and patients with a history of wrist trauma.

Diagnosis
Scapholunate advanced collapse is a radiographic diagnosis. The Watson and Ballet classification identifies three stages of progressive wrist osteoarthritis that can be identified on a standard posterior-anterior (PA) wrist x-ray.