Intraglandular Ordinary Lipoma of the Submandibular Gland

Lipomas are the most common soft tissue lesions occurring in the salivary glands but have a very low incidence. Lipomas commonly occur in the parotid gland, and lipomas in the submandibular gland (SMG) are rare. Until recently, ordinary lipomas of the parotid gland and some variants of lipomas of the SMG have been reported. However, few reports of ordinary lipomas occurring within the SMG exist in the literature. We report an extremely rare case of ordinary lipoma within the right SMG of a 65-year-old man. The tumor measured a 2.0 × 1.8 × 2.7 cm, was a well-capsulated homogenous yellow mass, which was composed of mature adipose tissue. A partially mixed area with salivary gland tissue was observed. There has not been much research on lipomatous tumors from the SMG because of their rareness. Most lipomatous tumors in the parotid gland are known as ordinary lipomas, but more research is needed to determine whether they can be applied to the SMG. Thus, this report will be instrumental in the understanding of lipomatous tumors of the SMG.