An adenocarcinoma that arises from the submandibular gland. Representative examples include polymorphic low-grade adenocarcinoma and acinic cell carcinoma. The disease is Monarch Disease Ontology id MONDO_0006435 (submandibular gland adenocarcinoma). Also known as: adenocarcinoma of submandibular gland, adenocarcinoma of the submandibular gland.