Non-Ossifying Fibroma Symptoms & Causes

In-Depth

What is non-ossifying fibroma?
A non-ossifying fibroma is a benign (non-cancerous), non-aggressive tumor that consists mainly of fibrous tissue. It’s almost always found in the thighbone or shinbone, but may also occur in the upper extremities. These usually resolve by themselves and never spread.

What causes non-ossifying fibroma?
While the cause is unknown, it’s believed to be a defect connected to:

  • vascular disturbance
  • hemorrhage inside the bone

Is non-ossifying fibroma common?
A non-ossifying fibroma is one of the more common benign tumors found in children and adolescents.

What are the symptoms of non-ossifying fibroma?

Typically a non-ossifying fibroma produces no symptoms, although those that are particularly large can cause chronic bone pain and/or a fracture. They’re often discovered by chance on x-rays.