Sialolithiasis of minor salivary glands.

Sialolithiasis of minor salivary glands is generally considered to be extremely rare. Reports of seven cases are presented. A review of the literature suggests that the condition is not as uncommon as previously considered, and that definitive histopathological diagnosis of lip swellings should be obtained due to the incidence of labial pleomorphic adenoma and the possibility of the clinical misdiagnosis with sialolithiasis.