PMC5632446_01
MRI of lesion in base of tongue.
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fig1
Haematoxylin and eosin (H&E) stain at x40 magnification.
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fig2
Two tongue biopsies performed were inconclusive; however, the third biopsy a month later showed an infiltrating biphasic tumour with solid nests composed of epithelial and myoepithelial cells as shown in Figure 2.
H&E stain demonstrating perineural invasion of the tumour.
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fig3
The tumour cells also demonstrated perineural invasion as shown in Figure 3.