It is important to note that even asymptomatic PID can and does cause serious harm. Laparoscopic identification is helpful in diagnosing tubal disease, 65–90% positive predictive value in patients with presumed PID.
Laparoscopy is the current criterion standard for the diagnosis of pelvic inflammatory disease. No single test is highly specific or sensitive for the disease, but certain laboratory studies that can be used to support the diagnosis include the erythrocyte sedimentation rate, C-reactive protein, and chlamydial and gonococcal DNA probes and cultures.
It is a serious complication of some sexually transmitted diseases (STDs), especially chlamydia and gonorrhea.
You can get PID without having an STI. Normal bacteria found in the vagina and on the cervix can sometimes cause PID. No one is sure why this happens.