title: Hybrid tumours of the salivary glands. A report of two cases involving the palate and a review of the literature.
abstract: Hybrid tumours are very rare salivary gland lesions composed of two or more different tumoural entities in a single neoplasm that arise within a definite topographical region. In most cases adenoid cystic carcinoma has been the predominant component in these lesions. In this study we describe two patients with hybrid tumours located in the palate, one in a 49-year-old woman and one in a 71-year-old man. The first case involved adenoid cystic carcinoma and mucoepidermoid carcinoma, and the patient in the second case exhibited adenoid cystic carcinoma and epithelial-myoepithelial carcinoma. Both patients were treated with surgery and radiotherapy, and there has been no evidence of recurrence after 13 and 36 months of follow-up, respectively. The recognition of the histologic component with the higher grade of malignancy in every case of hybrid tumour of the salivary glands is a necessary step to determine the biological behaviour and, consequently, to determine the proper therapeutic approach.
authors.affiliation: Department of Pathology, National Cancer Institute, Ave. San Fernando 22, CP 14000, Tlalpan, Mexico. lmgodoy@salud.gob.mx
authors.forename: Luz María
authors.initials: LM
authors.lastname: Ruíz-Godoy
authors.forename: Adalberto
authors.initials: A
authors.lastname: Mosqueda-Taylor
authors.forename: Lourdes
authors.initials: L
authors.lastname: Suárez-Roa
authors.forename: Adela
authors.initials: A
authors.lastname: Poitevin
authors.forename: Esther
authors.initials: E
authors.lastname: Bandala-Sánchez
authors.forename: Abelardo
authors.initials: A
authors.lastname: Meneses-García
mesh_terms: D000368:Aged; D003528:Carcinoma, Adenoid Cystic / Q000473:pathology; D018277:Carcinoma, Mucoepidermoid / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis / Q000473:pathology*; D010157:Palatal Neoplasms / Q000175:diagnosis / Q000473:pathology*; D010307:Parotid Neoplasms / Q000473:pathology; D012468:Salivary Gland Neoplasms / Q000175:diagnosis / Q000473:pathology*