PMC6180882_01
(a) Axial contrast-enhanced CT scan of the neck demonstrating bilateral parotid gland masses. Dominant ring-enhancing hypodense lesion of the left parotid gland measures 3.0 x 2.9 cm. (b) Coronally reconstructed CT scan with a prominent left cystic parotid mass and a smaller dense lesion of the right parotid gland. Few enlarged level 2 lymph nodes are noted bilaterally, ranging from 1.0 to 2.4 cm. Numerous non-pathologically enlarged jugular chain lymph nodes are visualized. (c) CT scan of the neck in sagittal reconstruction revealing a hypodense lesion with rim enhancement within the left superficial parotid gland.
bjrcr.20150119.g001.jpg
PMC6180882_01_bjrcr.20150119.g001.jpg
fig1
A CT scan of the neck with i.v. contrast demonstrated bilateral parotid masses with a dominant, ring-enhancing, hypodense lesion in the left superficial parotid gland, which measured 3.0 x 2.9 cm (Figure 1).
Gross specimen of left superficial parotidectomy with a 2.9 x 2.5 x 2.2cm cystic space containing clear yellow fluid. The wall of the cyst averages between 1.0 and 2.0 mm in thickness but is focally thickened up to 5.0 mm.
bjrcr.20150119.g002.jpg
PMC6180882_01_bjrcr.20150119.g002.jpg
fig2
A left superficial parotidectomy was performed, and upon pathological analysis, the peripherally enhancing lesion grossly appeared as a large yellowish fluid-filled cyst (Figure 2).
(a) Low power (40x) view of keratin stain showing lymphoepithelial complexes (brown islands) in the lymphoid tissue lining the cyst, confirming the diagnosis. (b) High power (400x) view of squamous lining of cyst on haematoxylin and eosin staining (large pink cells). (c) High power (400x) view showing keratin AE1/3 staining of squamous epithelial lining of lymphoepithelial cyst.
bjrcr.20150119.g003.jpg
PMC6180882_01_bjrcr.20150119.g003.jpg
fig3
Micropathology revealed a squamous epithelium-lined cyst with lymphoepithelial complexes (brown islands) consistent with a lymphoepithelial cyst (Figure 3).