myositis ossificans sterners tumor Wheeless

Description: Myositis Ossificans (Sterner's Tumor) Discussion: - extra-skeletal ossification that occurs in muscles & other soft tissues
- can be traumatic (75%), non traumatic, or progressive;
- severe blunt trauma causing an intra-muscular hematoma may result in delayed ossification;
- involved muscles: quadriceps, brachialis, and deltoid are involved most often;
- typically lesions are distant from joints, have decr pain w/ time;
- typically occurs in adolescents as a painless, enlarging mass in upper arm, thigh, or buttocks;
- associated with an intact cortex;
- demonstrate a zonal pattern;ositis Ossificans (Sterner's Tumor)