Department of Medical and Surgical Sciences for Children and Adults;
Division of Medical Oncology;
University Hospital of Modena and Reggio Emilia;
Department of Diagnostic Medicine and Public Health;
Division of Pathology;
University Hospital of Modena and Reggio Emilia;
Hepato-Pancreato-Biliary Surgery and Liver Transplantation Unit;
University Hospital of Modena and Reggio Emilia;
Azienda Ospedaliero-Universitaria Policlinico di Modena;
Gastrointestinal stromal tumor; Calcification; Stomach; Atypical presentation; Computed tomography;