RESUMEN
Sialolithiasis is the commonest benign disease of salivary glands.It usually occurs in the duct,leading to obstruction of salivary outflow and its associated consequences/symptoms.Of the salivary glands,the submandibular gland is the most frequently affected.Sialoliths usually measure around 5mm in maximum diameter.Calculi measuring greater than 15mm are giant sialoliths and have been rarely reported in literature.Diagnosis of calculi is based on history,examination and radiographic investigations.Management,which aims at the elimination of the calculus and restoration of normal salivary flow,may be either medical or surgical,depending on the site and size of the sialolith,and the condition of the gland.Self expulsion of a sialolith is an unusual occurrence.We report a rare case of a giant Wharton's duct sialolith with spontaneous extrusion into the oral cavity.