Dr. Francisco Bengoa
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Soft-tissue tumors

Ossifying fibromyxoid tumor

Soft tissueIntermediate / locally aggressive or rarely metastasizingTumours of uncertain differentiation

Epidemiology

A rare soft-tissue tumor in adults, often subcutaneous or intramuscular in the limbs. Its calcified or ossified rim can suggest the diagnosis, but confirmation avoids confusing it with myositis ossificans.

Basic features

It can have a peripheral shell of bone and variable histologic grades.

Usual treatment

Complete resection is recommended; radiotherapy or systemic management are considered if there are malignant features.

Outcomes and prognosis

Typical tumors are usually well controlled, but atypical or malignant variants can recur or metastasize.

Warning signs

These signs do not necessarily mean cancer, but they warrant evaluation before operating on or needling a mass.

  • A soft-tissue mass that grows, is larger than 5 cm, or is deep.
  • Persistent, night-time or progressive bone pain, especially if it limits activity.
  • A fracture from minimal trauma, or an aggressive bone lesion on an X-ray.
  • A lump that comes back after previous surgery.
  • Neurological symptoms, rapid swelling, or pain associated with a mass.

This information is general and does not replace a medical evaluation. A musculoskeletal tumor must be interpreted together with imaging, physical examination, biopsy when appropriate and each patient's context.

Specialist evaluation

If you have a mass, a bone lesion or a report suggesting a tumor, book an evaluation.

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