RT Journal Article SR Electronic T1 Phleboliths mistaken for intraperitoneal copper-containing intrauterine device in the presence of missing strings JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e237838 DO 10.1136/bcr-2020-237838 VO 14 IS 3 A1 Viet Nguyen A1 Alexa R Lindley A1 Bahar Mansoori A1 Emily Maria Godfrey YR 2021 UL http://casereports.bmj.com/content/14/3/e237838.abstract AB Although rare, pelvic phleboliths may confound the diagnosis of an intraperitoneal or malpositioned intrauterine device (IUD). Pelvic phleboliths are focal calcifications in pelvic veins, often in multiples near the ureters, occurring in about 40% of adult patients. We treated a 35-year-old woman requesting removal of her copper-containing IUD (TCu380A IUD). She had missing IUD strings on clinical examination. A clinic-based transvaginal ultrasound and anteroposterior abdominal radiograph that followed suggested prior TCu380A IUD expulsion. A radiologist later interpreted several ambiguous radiodensities in the abdominal radiograph as a possible intraperitoneal or malpositioned IUD. In collaboration with radiologists and family planning specialists, it was suggested that the patient further undergo a three-dimensional ultrasonography and a CT of the pelvis. The radiodensities first noted on the radiograph were revealed to be phleboliths, a diagnostic possibility not initially considered by any of the primary clinical care team, radiologists or family planning specialists.