title: Malignant transformation of an endometriotic cyst: MDCT and MR findings.
abstract: Malignant transformation is a rare complication of endometriosis. MR criteria for diagnosis include the presence of soft-tissue components, enhancement after contrast material administration in an endometriotic cyst. We present the multidetector CT and MR imaging findings in a case of an incidentally found endometrioid adenocarcinoma in a left-sided ovarian endometrioma, occurring in a 30-year old woman. MR imaging enabled the correct preoperative characterization of the lesion, by depicting a soft-tissue element, with strong and early enhancement after gadolinium administration. The same area had high signal intensity on diffusion-weighted images and low apparent diffusion coefficient values due to restricted diffusion, findings also strongly suggestive of malignancy.
authors.affiliation: Department of Clinical Radiology, University Hospital of Ioannina, Pl. Pargis 2, Ioannina, Greece. a_tsili@yahoo.gr
authors.forename: Athina C
authors.initials: AC
authors.lastname: Tsili
authors.forename: Maria I
authors.initials: MI
authors.lastname: Argyropoulou
authors.forename: George
authors.initials: G
authors.lastname: Koliopoulos
authors.forename: Evangelos
authors.initials: E
authors.lastname: Paraskevaidis
authors.forename: Konstantine
authors.initials: K
authors.lastname: Tsampoulas
mesh_terms: D000328:Adult; D018269:Carcinoma, Endometrioid / Q000000981:diagnostic imaging / Q000473:pathology*; D002471:Cell Transformation, Neoplastic; D003287:Contrast Media; D038524:Diffusion Magnetic Resonance Imaging; D004715:Endometriosis / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D005682:Gadolinium; D006801:Humans; D061330:Multidetector Computed Tomography; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D011868:Radioisotopes; D014591:Uterine Diseases / Q000000981:diagnostic imaging / Q000473:pathology*
chemical_list: D003287:Contrast Media; D011868:Radioisotopes; D005682:Gadolinium