Differential Diagnosis for Lower Abdominal Pain with White Discharge

Primary Gynecologic Considerations

The Centers for Disease Control and Prevention recommends that pelvic inflammatory disease (PID) should be the primary diagnostic consideration in sexually active women presenting with lower abdominal pain and white vaginal discharge, and empiric treatment should be initiated immediately if cervical motion tenderness, uterine tenderness, or adnexal tenderness is present on examination 1, 2
Empiric treatment should be initiated when minimum criteria are met: uterine/adnexal tenderness OR cervical motion tenderness in sexually active women at risk for STDs, as recommended by the Centers for Disease Control and Prevention 1, 2
Additional supportive findings for PID include: oral temperature >101°F, abnormal cervical or vaginal mucopurulent discharge, presence of white blood cells on saline microscopy of vaginal secretions, elevated ESR or CRP, according to the Centers for Disease Control and Prevention 1, 2
If cervical discharge appears normal and no white blood cells are found on wet prep, PID is unlikely and alternative causes should be investigated, as suggested by the Centers for Disease Control and Prevention 1, 2

The American College of Radiology recommends that CT abdomen and pelvis with contrast has 95% sensitivity and 94% specificity for diagnosing appendicitis 4
The American Academy of Family Physicians recommends that CT is the initial imaging test of choice with sensitivity greater than 95% for diagnosing diverticulitis 5, 6
The World Journal of Emergency Surgery reports that bowel obstruction accounts for approximately 15% of hospital admissions for acute abdominal pain, and presents with intermittent abdominal pain, vomiting, and bowel closed to gas 7

The Centers for Disease Control and Prevention recommends obtaining beta-hCG in all women of reproductive age to rule out pregnancy-related conditions, and performing pelvic examination looking specifically for cervical motion tenderness, uterine tenderness, or adnexal tenderness 1, 2, 3
The Journal of the American College of Radiology recommends that if diagnosis is unclear and patient is not pregnant: CT abdomen and pelvis with IV contrast is the imaging modality of choice 4, 8

Failing to obtain pregnancy testing before imaging can lead to delayed diagnosis of ectopic pregnancy, which is life-threatening, as warned by the Praxis Medical Insights 3
Delaying antibiotic treatment for PID while awaiting test results increases risk of long-term sequelae including infertility, as cautioned by the Centers for Disease Control and Prevention 1, 2
Assuming normal-appearing cervical discharge rules out PID—must check for white blood cells on wet prep, as advised by the Centers for Disease Control and Prevention 1, 2

The World Journal of Emergency Surgery and the American Academy of Family Physicians report that elderly patients are at higher risk for serious pathology including bowel obstruction and diverticulitis 6, 7