Traction epiphysis is are
Traction epiphysis are usually present at the end if bones and develop due to traction by the attached muscle (and are therefore extracapsular), eg Greater (and lesser) tubercle in humerus and greater ( and lesser) trochanter in femur Ref: Gray's39e/p185-210
Head of humerus
Lesser tubercle
Deltoid tuberosity
Ciracoid process
General anatomy