title: CT and MR appearances of parotid pseudotumors in Sjögren syndrome.
abstract: The radiologic findings in eight patients with parotid pseudotumors associated with Sjögren syndrome (CT in eight; MRI in two) were retrospectively analyzed and compared with the findings in three cases with malignant lymphomas. Diagnosis of pseudotumor was obtained by surgery in six cases and by fine-needle aspiration biopsy and radiologic follow-up in the remaining cases. Six cases (75%) had advanced disease and the remaining had early disease. Both solid (75%) and cystic (38%) masses were seen in the patients with pseudotumors. The masses were solitary in 25%, multiple in 75%, unilateral in 25%, and bilateral in 75%. All three lymphomas were solid masses. The lymphomatous masses were not reliably distinguished from the solid pseudotumors.
authors.affiliation: Department of Radiology, Osaka University Medical School, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Takashima
authors.forename: T
authors.initials: T
authors.lastname: Nagareda
authors.forename: Y
authors.initials: Y
authors.lastname: Noguchi
authors.forename: N
authors.initials: N
authors.lastname: Takeuchi
authors.forename: N
authors.initials: N
authors.lastname: Tomiyama
authors.forename: T
authors.initials: T
authors.lastname: Johkoh
authors.forename: J
authors.initials: J
authors.lastname: Ikezoe
authors.forename: T
authors.initials: T
authors.lastname: Kozuka
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010305:Parotid Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D012189:Retrospective Studies; D012859:Sjogren's Syndrome / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D014057:Tomography, X-Ray Computed