Telangiectasia, Hereditary Hemorrhagic, Type 5, is also known as hht5, and has symptoms including spontaneous, recurrent epistaxis An important gene associated with Telangiectasia, Hereditary Hemorrhagic, Type 5 is GDF2 (Growth Differentiation Factor 2). Affiliated tissues include liver and lung, and related phenotypes are telangiectasia and spontaneous, recurrent epistaxis