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Tongue fat and lymphatic drainage. A: representative 3-dimensional volumetric reconstruction of tongue and fat within tongue (yellow) from a series of 3-mm contiguous axial MR images superimposed on a midsagittal image. There is substantially more fat at the base of the tongue. RG, retroglossal; RP, retropalatal. Image from Ref. 246, with permission from Oxford University Press. B: transverse section through the oral cavity illustrating lymphatic drainage of the tongue.
