<prompt> 40 year old man is suffering from fever pain in the scrotum which is not relieved by elevation of testis. 3 days before he 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 -- epididymo-orchitis. Dont be confused with fever, it can also occur in torsion, especially in older patients. 