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Circumvallate papillae  

Normally the circumvallate papillae are seen on the posterior dorsum of the tongue, anterior to the sulcus terminalis. This is another structure that may vary in size and shape and may be mistaken for a soft tissue tumour.

Image	Caption
	Figure 1: Circumvallate papillae (arrows) appear as nodules (8-10 in number) on the posterior third of tongue.