Why this 'bubbly' bone won’t come out in the wash

The rare complication resulted in one leg being 10cm shorter than the other

When these ‘soap bubbles’ showed up on an X-ray of a patient’s femur, they were a sign he had anything but a clean bill of health.

X-ray of femur

The 37-year-old man presented to an orthopaedic clinic with progressive difficulty walking. He had haemophilia type A and a history of inadequate factor VIII replacement therapy.

Ten years earlier, the patient had fractured his left femoral shaft. A resultant malunion was managed without surgery.

Since then, he had experienced repeated episodes