RESUMO
BACKGROUND: A pyosalpinx is the acute inflammation of the fallopian tube, which fills up and swells with pus. It commonly results from inadequate or delayed treatment of pelvic inflammatory disease. CASE PRESENTATION: We report the case of a 54-year-old Africain female patient, who presented with sustained high-grade fever, right flank pain, and severe acute storage low-urinary-tract symptoms. Computed tomography showed signs of acute obstructive pyelonephritis with a right tubular juxtauterine mass with complex internal fluid and thick enhancing walls exerting a mass effect on the right ureter. A drainage of the right excretory cavities by a JJ stent was performed. An ultrasound-guided aspiration of the collection was also performed. CONCLUSION: A pyosalpinx can then exert a mass effect on the excretory cavities, thus causing an acute obstructive pyelonephritis. A double drainage coupled with an effective antibiotic therapy is then necessary.