Carney-Stratakis Syndrome (CSS), first described in 2002 [1], encompasses Gastrointestinal Stromal Tumors (GISTs) and Paragangliomas (PGLs) has autosomal dominant inheritance with incomplete penetrance [2]. Germline mutations of Succinate Dehydrogenase (SDH) complex subunits consequent SDH functional deficiency have been identified as responsible for CSS [3]. Here, we present a case new mutatio...