MTOR and neoplasm with perivascular epithelioid cell differentiation: mTOR inhibitors have shown antineoplastic activity in PEComas of different sites, including the uterus (Liu et al., 2019, Italiano et al., 2010, Starbuck et al., 2016, Bissler et al., 2008, Wagner et al., 2010, Gennatas and Michalaki, 2012).