Salivary Gland Sialadenoma Papilliferum

**Semantic type:** Neoplastic Process

**Definition:** An uncommon exophytic papillary proliferation that involves mucosal surface epithelium and salivary duct epithelium. It is exceptional among salivary gland neoplasms because it manifests as an exophytic papillary excrescence of the mucosa, rather than as a submucosal or intraglandular mass. It most often affects the hard or soft palate. It is generally asymptomatic.