Non-anatomical bony block
- transfer of coracoid process through subscapularis
- dynamic anteroinferior musculotendinous sling
- provides subscapularis tenodesis
- preventing lower portion from displacing proximally as arm abducted
- when shoulder in vulnerable position abduction and ER
Most common tumour of hand
F > M
2nd - 4th decade
Unknown
Trauma
Mucoid degeneration of collagen tissue
Synovial herniation
Benign aggressive
- most serious of all benign STT
1. Intra-abdominal
- association familial polyposis coli & Gardner's syndrome
- aggressive infiltration
- death from retroperitoneal extension
2. Extra-abdominal
Non-metatasizing locally aggressive STT
Benign lesion with a wide spectrum of behavior characterized by stromal cells and giant cells
Common
- 20% of benign tumours
More common females
- F:M = 1.5:1
- most tumours M>F
Usually patient in 20's
- usually after skeletal maturity
- 3% < epiphyseal closure