Tumors of the ampulla of Vater treated by local resection: a report of five cases.

The clinical features, diagnostic work-up and difficulties in establishing a diagnosis on endoscopic biopsy specimens were retrospectively analysed in five patients with ampullary tumors. In addition, the technique of local papillary resection is reported. Indications for local resection are: elderly patients with severe co-existing diseases, patients with benign ampullary tumors which are either adenomatous or show epithelial dysplasia or patients with inconclusive preoperative endoscopic biopsy or peroperative frozen sections.

The incidence, multiple presentation and recurrence of aggressive cysts of the jaws.

The incidence, multiple presentation and recurrence rate of aggressive cysts of the jaws is discussed, based on a study of 677 cysts in 651 patients. Cysts that are considered aggressive include: cysts in which carcinoma develops, unicystic ameloblastoma, keratocysts and calcifying odontogenic cysts. Based on literature studies and on our own material, the incidence and multiplicity of these lesions is calculated.