K2M Group Holdings Inc. is launching its Sahara Al Expandable stabilization system, the company's first expandable offering within its interbody portfolio. Sahara adds more ammunition to the Leesburg, Va.-based company's portfolio options and its bid to gain more share in the spine market, which has seen significant consolidation over the past few years. K2M is third in the complex spine market, trailing behind New Brunswick, N.J.-based Johnson & Johnson Corp. and Dublin-based Medtronic plc.