MTOR and fibrosarcoma: KRAS interacts with multiple signaling pathways, such as the phosphoinositide 3-kinase (PI3K)-protein kinase B (AKT)-mammalian target of rapamycin (mTOR) signaling pathway and the rapidly accelerated fibrosarcoma (RAF)-mitogen-activated protein kinase (MEK)-extracellular regulated protein kinase (ERK) signaling pathway 36.