Takashima S, Nagareda T, Noguchi Y, Takeuchi N, Tomiyama N, Johkoh T, Ikezoe J, Kozuka T
Department of Radiology, Osaka University Medical School, Japan.
J Comput Assist Tomogr. 1992 May-Jun;16(3):376-83. doi: 10.1097/00004728-199205000-00008.
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.
