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Review
. 2014;43(6):20140127.
doi: 10.1259/dmfr.20140127. Epub 2014 May 21.

Imaging findings of necrotizing sialometaplasia of the parotid gland: case report and literature review

T Tsuji  1 , Y Nishide, H Nakano, K Kida, K Satoh
Affiliations
Review

Imaging findings of necrotizing sialometaplasia of the parotid gland: case report and literature review

T Tsuji et al. Dentomaxillofac Radiol. 2014.

Abstract

Although necrotizing sialometaplasia (NS) of the parotid gland is rare and occasionally presents as a lesion that mimics a malignant tumour, imaging findings in cases of NS have been rarely reported. We describe here a case of NS in which there was an increasing lesion manifesting overnight on the parotid gland in an 83-year-old male. We also investigated the use of pre-operative imaging based on previous reports and discuss the importance of these images in helping to guard against overzealous treatment. It is critically important to closely examine whether there are aspects of NS, such as the present case, in pre-operative MRI findings that can be useful in proper diagnosis and treatment.

Keywords: MRI; necrotizing sialometaplasia; parotid gland; pre-operative imaging.

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Figures

Figure 1
Figure 1
A palpable hard and firm mass was found on the right parotid gland tail at the first visit.
Figure 2
Figure 2
Ultrasonography showing the inhomogeneous hypoechoic appearance on the right parotid gland. The size of the mass was (a) 26.5 mm × (b) 21.8 mm × (c) 19.9 mm.
Figure 3
Figure 3
CT images showing the poorly marginated mass with normal parotid gland tissue.
Figure 4
Figure 4
(a) An axial section and (b) a coronal section with T2 weighted MRI showing an apparently well-circumscribed mass with surrounding high signal intensity in the right parotid gland tail. (c) A coronal section with T1 weighted MRI showing high intensity on the inner wall of the mass.
Figure 5
Figure 5
A faint accumulation of gallium-67 was observed over the whole area of the right parotid gland in comparison with the left parotid gland.
Figure 6
Figure 6
(a) Normal salivary gland tissues can be seen in the right portion, and the inflammatory tissues are present in the left portion. (b) The fibrous connective tissue with inflammatory cell infiltrate and squamous metaplastic tissues conforming to the outline of the salivary ducts can be observed. (c) On a high-power view, squamous metaplasia without cytological atypia around the salivary gland duct can be observed. (d) Necrotic tissues and inflammatory infiltration with histiocytes can be observed. Original magnifications: (a, b) ×40; (c) ×200; (d) ×100, haematoxylin and eosin stained.
See this image and copyright information in PMC

Comment in

References

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