<prompt> 40 year old men is suffering from fever pain in scrotum which is not relieved by elevation of testis. 3 days before had sexual contact with a young female ?Testicular tumourAcute epididymitisTorsion of testisAcute orchitis  <response>: Ans is c ie Torsion of testis Torsion of testis can be differentiated from acute epididymitis by Prehns sign. ie. On elevation of testis the pain increases in -- Torsion On elevation of testis the pain decreases in epididymoorchitis. Dont be confused with fever, it can also occur in torsion, especially in older patients. 