title: 'Combined ameloblastoma and odontogenic keratocyst' or 'keratinising ameloblastoma'.
abstract: Four cases of either combined occurrence of ameloblastoma and odontogenic keratocyst or a rare keratinising variant of ameloblastoma are presented. The cardinal histomorphologic characteristics are simultaneous occurrence of ameloblastomatous epithelial islands with central keratinisation and multiple keratinising cysts. Immunohistochemically the tumour elements were keratin positive and occasionally S-100 protein and desmin positive. Major differential diagnosis of these neoplasms are discussed.
authors.affiliation: Department of Oral Pathology, Oral Medicine and Periodontology, University of Malaya.
authors.forename: C H
authors.initials: CH
authors.lastname: Siar
authors.forename: K H
authors.initials: KH
authors.lastname: Ng
mesh_terms: D000328:Adult; D000564:Ameloblastoma / Q000473:pathology*; D003238:Connective Tissue / Q000473:pathology; D003893:Desmin / Q000032:analysis; D004848:Epithelium / Q000473:pathology; D005260:Female; D006801:Humans; D007633:Keratins / Q000032:analysis; D007642:Keratosis / Q000473:pathology; D008297:Male; D008336:Mandibular Diseases / Q000473:pathology; D008339:Mandibular Neoplasms / Q000473:pathology; D008439:Maxillary Diseases / Q000473:pathology; D008441:Maxillary Neoplasms / Q000473:pathology; D009807:Odontogenic Cysts / Q000473:pathology*; D009418:S100 Proteins / Q000032:analysis
chemical_list: D003893:Desmin; D009418:S100 Proteins; D007633:Keratins