The authors report a case of pelvic actinomycosis causing ureteral obs
truction in a 30-year-old woman. An intra-uterine device being in plac
e for 6 years is considered as the main cause. The treatment, which in
cluded a laparotomy for abscess drainage, an indwelling double pigtail
ureteral stent and a 9 month antibiotherapy led to recovery after an
initial relapse.