title: A variant of calcifying epithelial odontogenic tumor with Langerhans cells.
abstract: A variant of calcifying epithelial odontogenic tumor (CEOT) with Langerhans cells is reported. Compared to a typical CEOT, the tumor islands of this case were thin and composed of a small number of polyhedral epithelial cells. Almost no calcification of homogeneous eosinophilic materials was observed. In addition, clear cells which structurally corresponded to Langerhans cell were intermingled in the epithelial islands. These cells stain positively for S-100 protein, lysozome, MT 1, LN-3 and OKT 6 antibodies, but not for keratin antibody. Electronmicroscopic examination revealed the rod-shaped and racket-shaped structures called Birbeck's granules in the cytoplasm of these clear cells. Our observations indicate a variant case of CEOT with Langerhans cells in tumor nests.
authors: Department of Pathology, Nimon University School of Dentistry, Tokyo, Japan.
authors: M
authors: M
authors: Asano
authors: T
authors: T
authors: Takahashi
authors: K
authors: K
authors: Kusama
authors: T
authors: T
authors: Iwase
authors: M
authors: M
authors: Hori
authors: H
authors: H
authors: Yamanoi
authors: H
authors: H
authors: Tanaka
authors: I
authors: I
authors: Moro
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000473:pathology; D003238:Connective Tissue / Q000473:pathology; D004848:Epithelium / Q000473:pathology; D005260:Female; D006801:Humans; D007801:Langerhans Cells / Q000737:chemistry / Q000473:pathology* / Q000648:ultrastructure; D008441:Maxillary Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000648:ultrastructure; D008854:Microscopy, Electron; D009808:Odontogenic Tumors / Q000737:chemistry / Q000473:pathology* / Q000648:ultrastructure