Extra-ampullary duodenal adenoma: a clinicopathological study.
Histopathology
; 71(2): 200-207, 2017 Aug.
Article
em En
| MEDLINE
| ID: mdl-28211946
ABSTRACT
AIMS:
Extra-ampullary duodenal adenoma (EADA) is a rare condition with poorly described clinicopathological details. In this study, we aimed to characterize EADA clinicopathologically. METHODS ANDRESULTS:
We performed a retrospective review of 44 serial cases of EADA. Each EADA was categorized as either gastric-type (n = 5) or intestinal-type (n = 39). All gastric-type adenomas were located in the first portion of the duodenum and exhibited a pedunculated shape. Gastric-type adenomas were classified into two subtypes pyloric gland and foveolar. The former consisted of mucin 6 (MUC6)-positive glands covered with MUC5AC-positive cells, whereas nearly all the latter consisted of MUC5AC-positive cells. When EADAs were categorized into high and low grades, approximately 40% (16 of 44) were high-grade. The high-grade adenomas were significantly larger than the low-grade adenomas (19.4 ± 8.6 mm versus 11.8 ± 5.1 mm, P = 0.021), and all adenomas greater than 20 mm in largest diameter were categorized as high-grade adenomas. Among 16 individuals who underwent total colonoscopy before or after duodenal mucosal resection, nine had a colorectal neoplasm, and all nine duodenal lesions were of the intestinal phenotype.CONCLUSIONS:
We clarified the clinicopathological characteristics of gastric- and intestinal-type EADAs. EADAs greater than 20 mm at the largest diameter were consistently high-grade, and are thought to have the potential to progress to adenocarcinoma. These findings should be helpful for the clinical management of EADA.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Lesões Pré-Cancerosas
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Adenoma
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Neoplasias Duodenais
Tipo de estudo:
Observational_studies
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Histopathology
Ano de publicação:
2017
Tipo de documento:
Article