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Clinical and Histological Features of Multifocal Canalicular Adenomas of the Upper Lip
Siqueira, Carla Silva; Fernandes, Karin Sa; Vivas, Ana Paula Molina; Pinto Junior, Decio dos Santos; Sousa, Suzana Cantanhede Orsini Machado de.
  • Siqueira, Carla Silva; USP - University of Sao Paulo. School of Dentistry. Department of Stomatology, Oral Pathology. Sao Paulo. BR
  • Fernandes, Karin Sa; USP - University of Sao Paulo. School of Dentistry. Department of Stomatology, Oral Pathology. Sao Paulo. BR
  • Vivas, Ana Paula Molina; USP - University of Sao Paulo. School of Dentistry. Department of Stomatology, Oral Pathology. Sao Paulo. BR
  • Pinto Junior, Decio dos Santos; USP - University of Sao Paulo. School of Dentistry. Department of Stomatology, Oral Pathology. Sao Paulo. BR
  • Sousa, Suzana Cantanhede Orsini Machado de; USP - University of Sao Paulo. School of Dentistry. Department of Stomatology, Oral Pathology. Sao Paulo. BR
Braz. dent. j ; 24(5): 542-546, Sep-Oct/2013. tab, graf
Article in English | LILACS | ID: lil-697636
ABSTRACT
Canalicular adenoma (CA) is an uncommon benign salivary gland tumor that mostly occurs in the upper lip. Despite its benign nature, some patients may present multiple nodules and also microscopic growth that can be multifocal with foci of tumor within the adjacent gland. Microscopically, CA can be mistaken for a polymorphous low-grade adenocarcinoma (PLGA) or basal cell adenoma (BCA), and immunohistochemistry can be helpful in differentiating them. Two cases of canalicular adenoma showing tumor foci within the adjacent gland are described. Both cases occurred in the upper lip of white females aged 72 and 79 years. In addition to the histological multifocal aspect, one of the patients presented bi-lateral nodules. Histological examination of both lesions revealed interconnecting and branching canal-like structures composed by uniform columnar and sometimes cuboidal cells, partially encapsulated. Immunohistochemical analysis showed intense expression of cytokeratins (CK) 7, a weak reaction to CK14 and a negative reaction to vimentin. Upon the diagnosis of CA the lesions were excised. In conclusion, it is important to properly diagnose CA and differentiate its multifocal aspect from a malignant behavior.
RESUMO
O adenoma canalicular (AC) é uma rara neoplasia benigna de glândula salivar que ocorre com maior frequência em lábio superior. Apesar de sua natureza benigna, alguns pacientes podem apresentar múltiplos nódulos, além de apresentar microscopicamente um crescimento multifocal com focos de neoplasia na glândula adjacente. Microscopicamente, AC pode ser confundido com adenocarcinoma polimorfo de baixo grau ou adenoma de células basais, sendo a imunohistoquímica útil na diferenciação entre eles. Dois casos de AC com focos de neoplasia dentro da glândula são descritos. Ambos os casos ocorreram em lábio superior de dois indivíduos do sexo feminino com 72 e 79 anos de idade. Além do aspecto histológico multifocal, um dos pacientes apresentou nódulos bilaterais. A análise histológica dos dois casos revelou estruturas canaliculares interligadas, compostas por células colunares uniformes e cuboidais, parcialmente encapsuladas. A análise imunohistoquímica mostrou intensa marcação de citoqueratina (CK) 7, uma fraca expressão para CK14, e reação negativa para vmentina. Após o diagnóstico as lesões foram excisionadas.

Conclusão:

É importante o correto diagnóstico do AC e a diferenciação do aspecto multifocal de um comportamento maligno.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Lip Neoplasms / Adenoma Limits: Aged / Female / Humans Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: USP - University of Sao Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Lip Neoplasms / Adenoma Limits: Aged / Female / Humans Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: USP - University of Sao Paulo/BR