Neurogenic heterotopic ossification: a pictorial review.

Neurogenic heterotopic ossification is a condition whereby bone forms in an extra-skeletal site. It may occur in the context of major neurological insult involving the brain or spinal cord. It causes pain and restricts movement, most commonly at the hip joints. Although neurogenic heterotopic ossification is associated with significant morbidity, the diagnosis is not always considered when referring for imaging in susceptible individuals. This article highlights its key features to promote better awareness and recognition, by reviewing clinical findings and imaging of patients across various modalities including plain radiographs, ultrasound and computed tomography. The management of neurogenic heterotopic ossification is limited by late identification and consequently clinicians should always be aware of this potentially significant diagnosis. Recognition in the acute hospital setting before transfer to rehabilitation services may prevent further clinical sequelae including urinary tract infection and pressure ulcers.