Orthopaedic rare diseases to know

1.Frieberg's disease - infarction and         fracture of 2nd metatarsal head.
 2. Kohler disease - avascular necrosis of navicula bone
 3. Server's disease - calcaneal apophysitis.
 4. Keinbock's disease - avascular necrosis of lunate
 5. Preiser's disease - avascular necrosis of scaphoid.
6. Panner's disease - osteochondrosis of capitulum of humerus.
 7. Osgood- Schlatter's syndrome - tibial tuberosity apophysitis.
8. Sinding Larsen Johansson syndrome -  chronic apophysitis or avulsion injury of inferior patellar pole.