My Orthopaedic Surgeon

Osteonecrosis is a disease characterized by a derangement of osseous circulation leading to actual necrosis of osseous tissue. Osteonecrosis of the knee has been divided into 2 separate entities, spontaneous osteonecrosis of the knee (SPONK) and secondary osteonecrosis.
Synonyms and related keywords: spontaneous osteonecrosis of the knee, SPONK, secondary osteonecrosis, avascular necrosis, AVN, aseptic necrosis, ischemic necrosis, idiopathic necrosis, knee pain, knee arthritis
Rajadhyaksha, Mont & Levine 2004

Uses search string allintitle: (osteonecrosis OR "avascular necrosis" OR AVN) (knee OR "distal femur" OR (tibia OR Tibial))
Yielded 500 + returns July 2007

Uses the search string "Osteonecrosis"[Majr:NoExp]knee which gave 315 articles in July 2007. Add further terms to refine the search

- commonly presents in females over age 60 years of age;
- pain may or may not be associated w/ acute injury and may be worse at night;
- these lesions often show articular degenerative changes, especially when lesions are large or when there is pre-existing varus deformities;
Wheeless' Textbook of Orthopaedics