A case of Kuttner tumor of the submandibular gland.

Kuttner tumor (known as chronic sclerosing sialadenitis) is a totally benign inflammatory lesion and to date there has been no report of malignancy. However, because of its clinical features, the clinical diagnosis is often that of a salivary gland neoplasm. We report a case of Kuttner tumor and discuss its differential diagnosis, especially the pathological diagnosis. Kuttner tumor may be mainly due to T lymphocyte immune reaction and of itself is a benign lesion, but it may provide a state in which a malignant lesion arises.