Synopsis
Recognise tubo-ovarian abscess as severe polymicrobial pelvic infection, start precise inpatient antimicrobial treatment, and escalate promptly to image-guided drainage or surgery when source control is needed.
- A tubo-ovarian abscess is an inflammatory mass involving fallopian tube, ovary and adjacent tissues, most often representing severe ascending pelvic inflammatory disease with polymicrobial aerobic and anaerobic infection.
- Symptoms include lower abdominal pain, fever, deep dyspareunia, abnormal discharge or bleeding; examination may show lower abdominal, cervical-motion and adnexal tenderness, but no feature is sufficiently sensitive to exclude disease.
- Obtain pregnancy testing, STI nucleic-acid tests including gonorrhoea and chlamydia, HIV and syphilis testing, full blood count, CRP, renal and liver profiles, and cultures when septic; negative cervical tests do not exclude upper-tract infection.
- Transvaginal ultrasound usually identifies a thick-walled complex adnexal collection, dilated tube, internal debris and hyperaemia; CT helps when bowel, appendix, urinary disease or wider abdominal sepsis is possible.
- A tubo-ovarian abscess warrants hospital care, intravenous broad-spectrum treatment and early senior review; BASHH recommends parenteral therapy for severe disease and abscess.
- One BASHH inpatient regimen is ceftriaxone 2 g IV daily plus doxycycline 100 mg twice daily, switching after improvement to oral doxycycline 100 mg twice daily plus metronidazole 400 mg twice daily to complete 14 days.
- An alternative is clindamycin 900 mg IV three times daily plus gentamicin with level-guided dosing, followed by clindamycin or doxycycline with metronidazole to complete 14 days.
- Drain percutaneously, transvaginally or surgically when rupture, sepsis, diagnostic uncertainty, persistent collection or inadequate clinical response makes antibiotics alone insufficient; ultrasound-guided aspiration is less invasive than laparoscopy in suitable anatomy.
Key red flags
Hypotension, altered mental state, mottling, oliguria, hypoxia or elevated lactate indicates organ dysfunction and requires immediate sepsis escalation.
Sudden generalised pain, guarding or rigid abdomen in a known abscess raises concern for rupture and emergency operative source control.
Pregnancy with pelvic pain or a mass requires specialist admission because ectopic pregnancy, obstetric infection and antimicrobial safety alter management.
Failure to improve clinically within 72 hours of appropriate treatment should trigger renewed imaging, microbiology review and drainage or surgery assessment.
Postmenopausal presentation, unusual organisms, recurrent abscess or a persistent mass after infection resolves warrants investigation for malignancy, bowel disease or another source.
Investigation priorities
Exclude ectopic pregnancy and identify a context requiring obstetric and antimicrobial modification.
Management branches
Organ dysfunction, shock, diffuse peritonism or sudden deterioration suggests uncontrolled or ruptured abscess.
- Use ABCDE, send blood cultures and lactate where indicated, start intravenous broad-spectrum antibiotics promptly and provide protocol-led fluid resuscitation.
- Call senior gynaecology, anaesthesia, microbiology and relevant surgical teams, arranging CT only if stable enough and it will change immediate source control.
- Proceed to urgent drainage, laparoscopy or laparotomy according to physiology and anatomy, obtaining pus cultures and controlling contamination.
Imaging supports tubo-ovarian abscess without current rupture or organ dysfunction.
- Review allergy, pregnancy, renal and hepatic function, obtain microbiology samples and start a BASHH-supported inpatient antimicrobial regimen.
- Record collection dimensions and drainage accessibility, involve senior gynaecology early and provide analgesia, fluids and thrombosis assessment.
- Track clinical improvement closely and switch to oral completion therapy only after sustained response and a secure source-control plan.