What is the most likely diagnosis?

• 43 year-old in a previous swimming pool accident

Frontal Radiograph of Pelvis

1. Osteosarcoma
2. Paget's disease
3. Healed Fracture
4. Heterotopic ossification
5. Hypervitaminosis D

Additional Images - None

 

Additional Images

 

 

None

Answer:

4. Heterotopic ossification

 

More (Click Discussion Tab)

 

Heterotopic ossification

General considerations

• Defined as the abnormal formation of true bone within extra-skeletal soft tissues
• More common in males, especially following spinal cord injury, it is rare in young children
• Formerly called myositis ossificans
  • That term has fallen out of favor because the condition is not always inflammatory and ossification occurs in soft tissues other than muscle
• Strong association exists between HO and spinal cord or traumatic brain injury
  • About 20-30% of patients with neurologic deficits will develop HO, possibly higher with spinal cord injuries

 

MORE . . .