PMC6444322_01
B-mode sonography of the first tumor in the caudal pole of the right parotid gland (1. case), GP - parotid gland, UK - mandible
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fig1
Blue regions depict tissue that is less stiff than red colored regions (Fig. 1, Fig. 2).
Virtual Touch Imaging Quantification of the first tumor in the caudal pole of the right parotid gland (1. case). You can see that the region of interest is measured and shows a colour-graded scale. Blue regions depict tissue that is more elastic than red coloured regions
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fig2
VTIQ showed an elastic tumor (color-rated: blue to green, Fig. 2). In the VTIQ, the tissue was also less stiff with a "black hole" representing a cystic area (Fig. 2).
B-mode sonography of the second tumor with one cystic area in the right parotid gland (1. case), GP - parotid gland, UK - mandible
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fig3
It measured 13.8 x 15.3 x 21.0 mm (Fig. 3).
B-mode sonography of the second tumor with one cystic area in the right parotid gland (1. case)
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fig4
It showed an anechoic area, echogenic internal echoes and distal acoustic enhancement (Fig. 4, Fig. 5).
Virtual Touch Imaging Quantification of the second tumor with one cystic area ("black area") and a colour-graded scale in the right parotid gland (1. case). Blue regions depict tissue that is more elastic than red coloured regions. The red areas can be artefacts because of the surrounding bone. One measurement shows the velocity of the shear waves
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fig6
It was diffusely vascularized (Fig. 6).
Tumor mass after resection (1. case): Both entities together: on the left side beige-browny, lobulated cut surface with a cystic formation (pleomorphic adenoma, arrow), on the right side browny-yellow, polycystic cut surface (cystadenolymphoma, asterisk)
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fig7
The macroscopic differences on the cut surfaces were clearly visible (Fig. 7).
PMC6444322_02
B-mode sonography of the first tumor in the preauricular area of the right parotid gland (2. case, RF1 - first tumor)
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fig8
The preauricular, hypoechoic, homogeneous tumor measured 11.5 x 5.6 x 8.2 mm and showed distal acoustic enhancement (Fig. 8).
B-mode sonography of the second tumor in the caudal pole of the right parotid gland (2. case, RF2 - second tumor)
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fig9
The one in the caudal pole, also hypoechoic and with distal acoustic enhancement, but with echogenic internal echoes, measured 18.9 x 10.2 x 11.8 mm (Fig. 9).
Color-coded duplex sonography of one tumor in the right parotid gland which is peripherally vascularized (2. case)
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fig10
Its vascularization was rather peripheral (Fig. 10).