<h4>Background</h4>The TEMPI syndrome was recently described in 2011, and is characterized by the constellation of five hallmarks: Telangiectasias, Erythrocytosis and elevated Erythropoietin, Monoclonal gammopathy, Perinephric fluids collections, and Intrapulmonary shunting. Here, EPO is linked to Telangiectasia.