FINAL DIAGNOSE CASE -.....

 FINAL DIAGNOSE- CASE NO. (FB AND INSTA)

                         (Myelitis Ossificans)


This lateral elbow X-ray shows a well-defined, rounded, calcified mass in the soft tissue anterior to the distal humerus and not attached to the bone. The characteristic zonal pattern of ossification—with a more radiolucent center and denser peripheral ossification—supports the diagnosis of:   Myositis Ossificans

✅ Key Radiological Features:

  • Location: Soft tissue (commonly post-traumatic), not arising from bone.
  • Zonal ossification: Peripheral mature bone with central lucency.
  • Well-circumscribed lesion.
  • No cortical destruction or periosteal reaction, helping to differentiate it from aggressive neoplasms like osteosarcoma.

🧠 Important Differentials:

  • Osteosarcoma: Irregular margins, bone destruction, and central ossification (opposite of MO).
  • Soft tissue sarcoma with calcification: Less organized calcification pattern.
  • Tumoral calcinosis: Lobulated calcified masses but without the zonal pattern...

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