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Morphological features useful in the differential diagnosis between undifferentiated carcinoma and gastrointestinal stromal tumor
B. Vankova, K. Behenska, M. Bauer, M. Sedivcova, M. Daumova, A. Agaimy, M. Michal, O. Daum
Jazyk angličtina Země Spojené státy americké
Typ dokumentu časopisecké články
- MeSH
- diferenciální diagnóza MeSH
- dospělí MeSH
- gastrointestinální nádory diagnóza patologie MeSH
- gastrointestinální stromální tumory diagnóza patologie MeSH
- karcinom diagnóza patologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- nádorové biomarkery analýza MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Undifferentiated (sarcomatoid) carcinomas may closely mimic gastrointestinal stromal tumors (GISTs) due to possible histological and immunohistochemical overlap between these two entities. To avoid unnecessary employment of a wide spectrum of immunohistochemical stainings and molecular genetics and thus decrease costs, finding simple morphological features to target further investigation of such neoplasms of the gastrointestinal tract would be helpful. Five cases classified as undifferentiated (sarcomatoid) carcinomas with a definite proof of the diagnosis, i. e. the presence of a differentiated carcinomatous component, were retrieved from archives of several institutions. For comparison, 84 cases of GIST mutated in KIT or PDGFRA genes served as the control group. Hematoxylin and eosin stained slides were evaluated for the presence of patterns which might discriminate between sarcomatoid carcinoma and GIST. Lymphatic invasion and entrapment of fat tissue strongly favor the diagnosis of undifferentiated carcinoma, as it was found in all or almost all cases of undifferentiated carcinoma, but in no GIST. Alternation of low- and high- grade areas, formation of angiosarcomatous-like spaces, and the presence of yolk sac-like areas were also detected in all cases of undifferentiated carcinoma, but only in 1.2%, 2.4% and 7.2% of the GISTs, respectively. Furthermore, DOG1 was negative in all cases of undifferentiated carcinoma. According to this study, the presence of the histological findings listed above should prompt extensive tumor sampling in order to find a differentiated carcinomatous component. However, due to the small number of cases of undifferentiated carcinoma available for the study, a larger multi-institutional study is warranted.
Citace poskytuje Crossref.org
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- $a Undifferentiated (sarcomatoid) carcinomas may closely mimic gastrointestinal stromal tumors (GISTs) due to possible histological and immunohistochemical overlap between these two entities. To avoid unnecessary employment of a wide spectrum of immunohistochemical stainings and molecular genetics and thus decrease costs, finding simple morphological features to target further investigation of such neoplasms of the gastrointestinal tract would be helpful. Five cases classified as undifferentiated (sarcomatoid) carcinomas with a definite proof of the diagnosis, i. e. the presence of a differentiated carcinomatous component, were retrieved from archives of several institutions. For comparison, 84 cases of GIST mutated in KIT or PDGFRA genes served as the control group. Hematoxylin and eosin stained slides were evaluated for the presence of patterns which might discriminate between sarcomatoid carcinoma and GIST. Lymphatic invasion and entrapment of fat tissue strongly favor the diagnosis of undifferentiated carcinoma, as it was found in all or almost all cases of undifferentiated carcinoma, but in no GIST. Alternation of low- and high- grade areas, formation of angiosarcomatous-like spaces, and the presence of yolk sac-like areas were also detected in all cases of undifferentiated carcinoma, but only in 1.2%, 2.4% and 7.2% of the GISTs, respectively. Furthermore, DOG1 was negative in all cases of undifferentiated carcinoma. According to this study, the presence of the histological findings listed above should prompt extensive tumor sampling in order to find a differentiated carcinomatous component. However, due to the small number of cases of undifferentiated carcinoma available for the study, a larger multi-institutional study is warranted.
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