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The submandibular gland consists of a larger superficial lobe lying within the digastric triangle in the neck and a smaller deep lobe lying within the floor of the mouth posteriorly (Figure 1.10). The two lobes are continuous with each other around the posterior border of the mylohyoid muscle. As in the parotid gland, the two “lobes” are not true lobes embryologically as the gland arises as a single epithelial outgrowth (Langdon 1998a). However, surgically it consists of the two lobes as described above. It is a mixed seromucinous gland.

Figure 1.10. The relationship of the superficial and deep lobes of the submandibular gland. (a) cross‐sectional anatomy. (b) The superficial lobe from outside. (c) The relationship of the deep and superficial lobes to the mylohyoid muscle.