Most of those affected with<unk>  have no prior underlying health problems or predisposing conditions. However, there are certain factors that may increase risk of<unk> . A larger testicle either due to normal variation or<unk>  tumor increases the risk of torsion. Similarly, the presence of a mass or malignancy involving the spermatic cord can also predispose to torsion. Age is also an important risk factor for torsion. Torsion most commonly occurs either in the newborn or just before or during puberty.<unk>  often occurs before or during puberty, prior to complete<unk>  descent. Epididymitis is more commonly a postpubertal condition. Several congenital anatomic malformations or variations in the testicle or the surrounding structures may allow for increased scrotal rotation and increase the risk of<unk> . A congenital malformation of the processus vaginalis known as "bell-clapper deformity" accounts for 90% of all cases. In this condition, rather than the testes attaching posteriorly to the inner lining of the scrotum by the mesorchium, the mesorchium terminates early and the testis is free floating in the tunica vaginalis. Other anatomic risk factors include horizontal lie of the testicle or a spermatic cord with a long intrascrotal portion. Cryptorchidisim is also a risk factor for torsion with some studies proposing a 10-fold higher risk.<unk>  may also be caused by trauma to the scrotum or exercise (in particular, bicycle riding), however only about 4-8% of cases are the result of trauma. There is thought to be a possible genetic basis for predisposition to torsion, based on multiple published reports of familial<unk> . There is controversy whether cold weather months are associated with an increased risk.
Testicular torsion
Epididymitis
Inguinal hernia
Hydrocele testis
Appendix of testis
Testicular rupture
Ovarian torsion
Penile fracture