A presumptive diagnosis of PID should be made and treatment initiated for sexually active young women and other women at risk for STIs if they are experiencing pelvic or lower abdominal pain, no cause for the illness other than PID can be identified, and if 1 or more of the following 3 minimum clinical criteria are present on pelvic examination: Cervical motion tenderness Uterine tenderness Adnexal tenderness In addition, on pelvic examination, a palpable adnexal mass suggests tubo-ovarian abscess.