Search

Your search keyword '"Carlos‐Bregni, Roman"' showing total 18 results
Start Over Author "Carlos‐Bregni, Roman"
18 results on '"Carlos‐Bregni, Roman"'

8. An updated clinical and epidemiological profile of the adenomatoid odontogenic tumour: a collaborative retrospective study

Author

Philipsen, Hans Peter, Reichart, Peter A., Siar, Chong Huat, Ng, Kok Han, Lau, Shin Hin, Zhang, Xiaolin, Dhanuthai, Kittipong, Swasdison, Somporn, Jainkittivong, Aree, Meer, Shabnum, Jivan, Vibha, Altini, Mario, Hazarey, Vinay, Ogawa, Ikuko, Takata, Takashi, Taylor, Adalberto Abel Mosqueda, Godoy, Héctor, Delgado, Wilson A., Carlos-Bregni, Roman, Macias, Juan Fransisco Reyes, Matsuzaka, Kenichi, Sato, Daisuke, Vargas, Pablo A., and Adebayo, Ezekiel Taiwo

Published
2007

16. Primordial odontogenic tumor: An immunohistochemical profile

Author

Ronell Bologna-Molina, Adalberto Mosqueda-Taylor, Roman Carlos-Bregni, Toshinari Mikami, Vanesa Pereira-Prado, F R Pires, Bologna Molina Ronell, Molecular Pathology Area, Faculty of Dentistry, Universidad de la República, Montevideo, Uruguay, Mikami Toshinari, Associate Professor, Division of Anatomical and Cellular Pathology, Department of Pathology, Iwate Medical University, Iwate, Japan, Pereira Prado Vanesa, Molecular Pathology Area, Faculty of Dentistry, Universidad de la República, Montevideo, Uruguay, Ramos Pires Fabio, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Brazil, Carlos Bregni Roman, Pathology Section, Head and Neck Clinical Center/Hospital Herrera-Llerandi, Guatemala City, Guatemala, and Mosqueda Taylor Adalberto, Health Care Department, Universidad Autónoma Metropolitana Xochimilco, Mexico

Subjects
Male, 0301 basic medicine, Pathology, medicine.medical_specialty, Adolescent, Antibodies, Neoplasm, Odontogenic Tumors, Vimentin, Histogenesis, RADIOGRAFIA, 03 medical and health sciences, 0302 clinical medicine, primordial, medicine, Humans, PTEN, Dental papilla, General Dentistry, Jaw tumors, Oral Medicine and Pathology, biology, TUMORES ODONTOGENICOS, NEOPLASIAS MAXILOMANDIBULARES, Research, Mesenchymal stem cell, odontogenic, Enamel organ, Odontogenic tumor, Endoglin, CIENCIAS MÉDICAS [UNESCO], medicine.disease, Immunohistochemistry, Jaw Neoplasms, 030104 developmental biology, Otorhinolaryngology, Child, Preschool, 030220 oncology & carcinogenesis, UNESCO::CIENCIAS MÉDICAS, biology.protein, Female, Surgery
Abstract

Background Primordial Odontogenic Tumor (POT) is a recently described odontogenic tumor characterized by a variably cellular loose fibrous tissue with areas similar to the dental papilla, covered by cuboidal to columnar epithelium that resembles the internal epithelium of the enamel organ, surrounded at least partly by a delicate fibrous capsule. The purpose of this study was to investigate the possible histogenesis and biological behavior of this rare tumor by means of a wide immunohistochemical analysis of its epithelial and mesenchymal components. Material and Methods The immunoexpression of twenty-three different antibodies were evaluated in four cases of POT. Results The epithelial cells that cover the periphery of the tumor showed immunopositivity for Cytokeratins 14 and 19, while Amelogenin, Glut-1, MOC-31, Caveolin-1. Galectin-3, PITX2, p53, Bax, Bcl-2, Survivin and PTEN were variably expressed in focal areas. The mesenchymal component of the tumor was positive for Vimentin, Syndecan-1, PITX2, Endoglin (CD105), CD 34, Cyclin D1, Bax, Bcl-2, Survivin and p53. PTEN and CD 90 showed a moderate positivity. BRAF V600E and Calretinin were negative in all samples. Cell proliferation markers (Ki-67, MCM-7) were expressed in

18. Peripheral developing odontoma in newborn. Report of two cases and literature review.

Author

Silva AR, Carlos-Bregni R, Vargas PA, de Almeida OP, and Lopes MA

Subjects
Humans, Infant, Male, Odontoma pathology, Odontoma surgery, Palatal Neoplasms pathology, Palatal Neoplasms surgery
Abstract

Extra-osseous odontogenic tumors are rarely observed. However, it is widely accepted that the remains of odontogenic epithelium entrapped in the oral soft tissues may be a possible source for peripheral odontogenic tumors differentiation. Peripheral developing odontoma is considered exceptionally rare, since few similar cases are described in the English-related literature under diverse nomenclature, such as irregular eruption, ectopic tooth, ectopic soft-tissue mesiodens, ectopic odontoma and extra-osseous tooth germ. Previously reported cases invariably affected children and surgical exploration revealed tooth germs exclusively embedded in the soft tissue without bone involvement. Microscopically, all these cases exhibited developing tooth germs composed of ameloblasts, enamel matrix, odontoblastic layer, dentin and dental papilla and the morphological findings seem to depend on the developmental stage of each tooth germ at discovery. Thus, we believe that it is relevant to report two additional cases that were recently diagnosed in Brazil and Guatemala, focusing on their nomenclature, correct diagnosis and further treatment.

Published
2009
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results