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Research ArticleHead and Neck Imaging

Myoepithelioma of the Parotid Gland: CT Imaging Findings

S. Wang, H. Shi, L. Wang and Q. Yu
American Journal of Neuroradiology August 2008, 29 (7) 1372-1375; DOI: https://doi.org/10.3174/ajnr.A1109
S. Wang
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H. Shi
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L. Wang
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Q. Yu
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  • Fig 1.
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    Fig 1.

    A 62-year-old woman with ME. A, Precontrast axial CT scan shows a round, well-defined mass (27.39 HU) in the superficial lobe of the right parotid gland abutting on the capsule of gland (arrow). B, Contrast-enhanced axial CT scan shows the mass (102.11 HU) with homogeneous strong enhancement (arrow). C, Microscopic examination (hematoxylin-eosin stain [HE]; ×2) shows that the ME (M) is separated from the parotid gland and the surrounding soft tissues by a fibrous capsule (FC). The stroma is scanty. D, Microscopic examination (HE; ×100) shows that the tumor is composed of the plasmacytoid and spindle cells. Relatively large vessels are seen in the tumor (arrows).

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    Fig 2.

    A 66-year-old woman with ME. A, Precontrast axial CT scan shows an indistinct margin mass in the superficial lobe of the left parotid gland abutting on the capsule of the gland with calcification (arrow). B, Contrast-enhanced axial CT scan shows the mass with inhomogeneous enhancement. It contains a central enhancing nodule (small black arrow) and a nonenhancing peripheral cystic component (white arrow). C, Microscopic examination (HE; ×10) shows the epithelioid nest (arrow) with a lot of vessels and a cystic component in the center (black asterisk). D, Microscopic examination (HE; ×20) shows the inflamed cells (long arrows) and the tumor cells (short arrow).

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    Fig 3.

    A 56-year-old woman with ME. A, Contrast-enhanced multiplanar reformatted coronal CT scan shows a well-defined mass in the tail of the right parotid gland with inhomogeneous enhancement (white arrow). Note the slitlike-shaped nonenhancing area (small black arrow). B, Microscopic examination (HE; ×40) shows that there are hemorrhage (stars) and tumor cells (arrow) in the stroma.

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    Fig 4.

    A 54-year-old man with ME. A, Precontrast axial CT scan shows a well-defined mass with a lobulated margin in the superficial lobe of the right parotid gland abutted on the capsule of the gland (arrow). B, Contrast-enhanced axial CT scan shows the mass with inhomogeneous enhancement. It contains enhancing nodules (arrows) and nonenhancing linear band (arrowheads). C, Microscopic examination (HE; ×2) shows the stroma (black asterisks) and epithelioid nests (arrows) with a lot of vessels. D, Microscopic examination (HE; ×100) shows that the nest is composed of plasmacytoid.

Tables

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    Case No.Size, mmMarginContourEnhancementCommentsMicroscopic Examination
    125.0 × 21.3 × 16.4Well definedLobulatedInhomogeneousEnhancing nodules, slitlike-shapedClearcytoplacytoid, epithelioid, collagenous, hemorrhage
    213.3 × 8.2 × 12.2Well definedLobulatedInhomogeneousEnhancing nodules, linear bandPlasmacytoid, mucoid
    39.2 × 7.9 × 12.6Well definedSmoothHomogeneousEnhancing nodulesSpindle, plasmacytoid
    414.6 × 14.6 × 18.6Well definedLobulatedInhomogeneousEnhancing nodules, linear bandPlasmacytoid, mucoid
    517.3 × 15.7 × 27.1Well definedSmoothInhomogeneousEnhancing nodules, slitlike-shapedPlasmacytoid, mucoid, hemorrhage
    68.5 × 7.5 × 13.2Well definedLobulatedInhomogeneousEnhancing nodules, slitlike-shapedPlasmacytoid, collagenous, hemorrhage
    721.6 × 16.4 × 27.4Well definedSmoothInhomogeneousEnhancing nodules, cystic areaSpindle, cystis degeneration
    817.6 × 17.0 × 21.2IndistinctSmoothInhomogeneousEnhancing nodules, cystic area, calcificationInfected, plasmacytoid, cystis degeneration
    913.5 × 15.6 × 18.2Well definedLobulatedInhomogeneousEnhancing nodules, cystic areaEpithelioid, cystis degeneration
    107.2 × 6.6 × 9.3Well definedSmoothHomogeneousEnhancing noduleSpindle, plasmacytoid
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American Journal of Neuroradiology: 29 (7)
American Journal of Neuroradiology
Vol. 29, Issue 7
August 2008
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Cite this article
S. Wang, H. Shi, L. Wang, Q. Yu
Myoepithelioma of the Parotid Gland: CT Imaging Findings
American Journal of Neuroradiology Aug 2008, 29 (7) 1372-1375; DOI: 10.3174/ajnr.A1109

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Myoepithelioma of the Parotid Gland: CT Imaging Findings
S. Wang, H. Shi, L. Wang, Q. Yu
American Journal of Neuroradiology Aug 2008, 29 (7) 1372-1375; DOI: 10.3174/ajnr.A1109
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