title: An unusual cause of pelvic pain: struma ovarii.
abstract: A 22 year old female patient presented with a three month history of pelvic discomfort and dysmenorrhoea. A pelvic MRI demonstrated a large mass measuring 10 x 6 cm in size. On T1 and T2 weighted images the mass was noted to be predominantly cystic. The mass also contained peripheral solid components as well as a large fat fluid level. Following excision, histological examination revealed a lesion with mature teratomatous elements but with a significant component (> 50%) being composed of mature thyroid tissue. A 2cm area within the lesion had the morphological pattern of a classical papillary thyroid carcinoma. A diagnosis of struma ovarii was made. Struma ovarii is a rare ovarian neoplasm generally arising in a teratoma and accounts for less than 1% all ovarian neoplasms. Here we present the above case of struma ovarii in a young patient and discuss the radiological characteristics of the disease.
authors.affiliation: Department of Radiology, Adelaide and Meath Incorporating the National Children's Hospital, Tallaght, Dublin, Ireland.
authors.forename: D F
authors.initials: DF
authors.lastname: Halpenny
authors.forename: J
authors.initials: J
authors.lastname: O'Brien
authors.forename: M M
authors.initials: MM
authors.lastname: Ibrahim
authors.forename: R
authors.initials: R
authors.lastname: Crotty
authors.forename: W C
authors.initials: WC
authors.lastname: Torreggiani
mesh_terms: D055011:Ablation Techniques; D003937:Diagnosis, Differential; D004412:Dysmenorrhea / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007457:Iodine Radioisotopes; D008279:Magnetic Resonance Imaging; D010051:Ovarian Neoplasms / Q000150:complications* / Q000601:surgery; D010053:Ovary / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D017699:Pelvic Pain / Q000209:etiology*; D035583:Rare Diseases; D013330:Struma Ovarii / Q000150:complications* / Q000601:surgery; D013961:Thyroid Gland / Q000000981:diagnostic imaging / Q000601:surgery; D013965:Thyroidectomy; D014463:Ultrasonography; D055815:Young Adult
chemical_list: D007457:Iodine Radioisotopes