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Why can an injury draw attention to a bone tumour without causing the tumour?

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bone disease Defect of tibia, caused by septic osteomyelitis in childhood, with compensatory thickening of the fibula (right). Normal bones are shown at left.

An injury does not cause a bone tumour, but it can draw attention to one that is already present.

When a bone is affected by a tumour, the growth can weaken the bone structure. This makes the bone more susceptible to a pathological fracture or significant pain following even minor trauma that might otherwise be inconsequential. Because these symptoms—such as persistent pain, tenderness, or disability—prompt a patient to seek medical evaluation, the underlying tumour is often discovered during the investigation of the injury.1

This sequence of events frequently leads to the mistaken conclusion that the trauma itself caused the cancer, when in reality, the injury simply acted as a catalyst for the clinical detection of a pre-existing condition.1