Post traumatic myositis ossificans: Sonographic findings

J Clin Ultrasound. Mar-Apr 2011;39(3):135-40. doi: 10.1002/jcu.20792. Epub 2011 Jan 24.


Purpose: The aim of this paper is to describe the sonographic (US) features of post traumatic myositis ossificans (PTMO).

Methods: Fifteen patients with histopathological diagnosis of PTMO were included. The following US parameters were evaluated: presence of a mass, calcifications, power Doppler signals, and relationship with adjacent structures.

Results: Five patients (33.3%) were diagnosed as early PTMO and 10 (66.6%) as mature PTMO. In both early and mature PTMO, US showed an oval hypoechoic mass, without infiltrative borders, located in a muscular belly. In the early phase, a center of less echogenicity was observed, associated with an outer sheet-like hyperechoic peripheral rim, while, in the mature phase, peripheral calcification created more reflections and distal acoustic shadowing was observed.

Conclusions: US is highly sensitive in the detection of PTMO, helps differentiate between PTMO and malignant soft tissue tumors, and can be used for follow-up of the lesions.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Biopsy, Needle
  • Child
  • Disease Progression
  • Female
  • Humans
  • Male
  • Middle Aged
  • Myositis Ossificans / diagnostic imaging*
  • Myositis Ossificans / etiology
  • Myositis Ossificans / pathology
  • Retrospective Studies
  • Ultrasonography, Doppler
  • Wounds and Injuries / complications
  • Young Adult