Kuttner tumor (chronic sclerosing sialadenitis).

Kuttner tumor (KT), known descriptively as chronic sclerosing sialadenitis, is a chronic inflammatory disease of the salivary gland. Clinically, it produces a firm swelling of the glands and may be difficult to distinguish from neoplasia. The diagnosis can only be made histologically and should not be difficult if the pathologist is aware of the condition's existence. Errors in diagnosis arise because KT is underrecognized and few cases have been reported in the English literature. We present a case of KT initially diagnosed as a primary salivary gland neoplasm that intraoperative frozen section revealed to be chronic sclerosing sialadenitis. Excision of the mass, usually carried out diagnostically, is adequate treatment.