How new prostate treatment works

An experimental treatment for prostate cancer may reduce the harmful side-effects of traditional treatment - incontinence and impotence, a study reported in the Lancet Oncology suggests.

The treatment uses high-frequency sound waves to heat and kill targeted cancer cells, leaving the surrounding tissue largely intact. The cancer cells are identified using MRI and a scanning biopsy that pinpoint exactly where the cancer lesions are.

Surgeon Hashim Ahmed from University College Hospital in London explains how the treatment works.