The authors, after having examined three recent cases, explain some basic concepts about diagnostics and therapy in cystoadenolynphome of salivary glands. As a matter of fact this neoplasia, in spite of its low frequency, is very important because of its still controversial etiopathology and recent tendency in increasing its incidence in females. Today the diagnostic protocol, undertaken after clinical examination, which is necessary, consists of ultrasonography or computerized tomography. But only postoperative histological examination gives a sure diagnosis and can point out main histomorphological characteristics of tumour. Therapeutic approach can be limited to conservative treatment, which is able to respect the parotid gland, its vascularization and innervation.