A<unk>  is any one of numerous<unk> s that occur in the pelvis.  Within the pelvis, these<unk> s may involve specific organs, or occupy intra-organ spaces.<unk> s of the presacral space and sacral space are most prevalent in children.<unk> s occupying specific organs have a more complex natural history.
Pelvic tumor
Ovarian disease
Pelvic inflammatory disease
Hydrocele
Salpingitis
Chronic pelvic pain
Uterine prolapse
Prostatitis