How are pid and vaginal cancer related?

Both are STD's: Pid (pelvic inflammatory disease) starts with a sexually transmitted bacterial infection such as gonorrhea or chlamydia which gains access to the upper pelvic organs. Vaginal dysplasia and cancer start off with the sexually-transmitted hpv (human papilloma virus), which also can cause cervical and vulvar cancers. So these two diseases are caused by different agents indifferent areas.

PID and HPV: Women with episodes of pid are more likely to have hpv (the most common sexually transmitted infection in the us). Hpv is the main causative agent of cervical, vaginal, anal, and young vulvar cancer.