Medtech's Big Market Movers (Sirtex Medical)

Sirtex Medical has created a medical device that treats inoperable liver tumors that spread from the colon. It is a single-use permanent implant to help deliver high doses of radiation to the tumor while keeping surrounding tissue relatively unaffected.

Last year, the Australian company's share price jumped 142%, to AUS$28.37 ($21.70) from AUS$11.73 ($10.40) at the end of 2013. As a result, the company added $782 million to its market cap.