CT and MR findings of basal cell adenoma of the parotid gland.
We report a case of basal cell adenoma in the left parotid gland. A 34-year-old woman presented with a non-tender mass in the left parotid gland. She had first noted it 7- years previously, and it had been gradually increasing in size. The tumor was well-circumscribed with a smooth contour. On noncontrast-enhanced CT, the tumor showed homogeneous soft tissue attenuation. No cystic portion or calcification was seen. The tumor showed homogeneous moderate enhancement on contrast-enhanced CT. Capsule-like ring enhancement was demonstrated. On T1-weighted MR imaging, the tumor was homogeneously hypointense to the surrounding parotid tissue and isointense to muscle. On T2-weighted imaging the tumor was homogeneously hyperintense to muscle but slightly hypointense to the surrounding parotid tissue. On Gd-enhanced T1-weighted imaging, the tumor demonstrated homogeneous moderate enhancement. Capsule-like ring enhancement was also demonstrated. Salivary (technetium-99m-pertechnetate) scintigraphy did not show any uptake in the tumor.
Department of Radiology, Teikyo University School of Medicine, Ichihara Hospital, 3426-3 Anesaki, Ichihara, Chiba 299-0111. JAPAN.
Tohru
T
Takeshita
Hiroko
H
Tanaka
Arimi
A
Harasawa
Tatsuro
T
Kaminaga
Tetsuo
T
Imamura
Shigeru
S
Furui
D000236:Adenoma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D000328:Adult; D003287:Contrast Media; D005260:Female; D005500:Follow-Up Studies; D005682:Gadolinium; D006801:Humans; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging; D010307:Parotid Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m; D014057:Tomography, X-Ray Computed
D003287:Contrast Media; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m; D005682:Gadolinium