Detection of MDM2-CDK4 amplification by fluorescence in situ hybridization in 200 paraffin-embedded tumor samples: utility in diagnosing adipocytic lesions and comparison with immunohistochemistry and real-time PCR.

Détails

ID Serval
serval:BIB_F49AE901B2C1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Detection of MDM2-CDK4 amplification by fluorescence in situ hybridization in 200 paraffin-embedded tumor samples: utility in diagnosing adipocytic lesions and comparison with immunohistochemistry and real-time PCR.
Périodique
American Journal of Surgical Pathology
Auteur(s)
Sirvent N., Coindre J.M., Maire G., Hostein I., Keslair F., Guillou L., Ranchere-Vince D., Terrier P., Pedeutour F.
ISSN
0147-5185 (Print)
ISSN-L
0147-5185
Statut éditorial
Publié
Date de publication
2007
Volume
31
Numéro
10
Pages
1476-1489
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Atypical lipomatous tumor/well-differentiated liposarcomas and dedifferentiated liposarcomas are characterized by the amplification of MDM2 and CDK4 genes. To evaluate the accuracy of fluorescence in situ hybridization (FISH) analysis in the differential diagnosis of adipose tissue tumors, we investigated MDM2-CDK4 status by FISH, real-time polymerase chain reaction (PCR) [quantitative PCR (Q-PCR)] and immunohistochemistry (IHC) in a series of 200 adipose tumors. First, we evaluated MDM2-CDK4 amplification and expression in a series of 94 well-defined adipose tissue tumors. Results showed that FISH was interpretable in 45 of 50 cases (90%), and was more specific and sensitive than Q-PCR and IHC. We then used the same techniques as complementary diagnostic tools in a series of 106 adipose and soft tissue tumors of unclear diagnosis to distinguish between (i) lipomas and atypical lipomatous tumor/well-differentiated liposarcomas, (ii) malignant undifferentiated tumors and dedifferentiated liposarcomas, and (iii) a variety of benign tumors and liposarcomas. Our results indicate that although helpful, IHC alone is often insufficient to solve diagnostic problems. FISH and Q-PCR methods gave concordant results and were equally informative in most cases. However, the proportion of noninterpretable cases was slightly higher with FISH than with Q-PCR. When tumor cells represented a minor component of the tumor tissue, such as with inflammatory tumors, FISH was more powerful than Q-PCR by allowing visualization of individual cells. In conclusion, we recommend that the evaluation of MDM2-CDK4 amplification using FISH or Q-PCR be used to supplement IHC analysis when diagnosis of adipose tissue tumors is not possible based on clinical and histologic information alone.
Mots-clé
Adipocytes/metabolism, Adipocytes/pathology, Adipose Tissue/metabolism, Adipose Tissue/pathology, Adolescent, Adult, Aged, Cyclin-Dependent Kinase 4/genetics, Cyclin-Dependent Kinase 4/metabolism, Female, Gene Expression Profiling/methods, Humans, Immunohistochemistry/methods, In Situ Hybridization, Fluorescence/methods, Lipoma/genetics, Lipoma/metabolism, Liposarcoma/diagnosis, Liposarcoma/genetics, Male, Middle Aged, Nucleic Acid Amplification Techniques, Paraffin Embedding, Proto-Oncogene Proteins c-mdm2/genetics, Proto-Oncogene Proteins c-mdm2/metabolism, Reproducibility of Results, Reverse Transcriptase Polymerase Chain Reaction, Soft Tissue Neoplasms/diagnosis, Soft Tissue Neoplasms/genetics, Tumor Markers, Biological/genetics, Tumor Markers, Biological/metabolism
Pubmed
Web of science
Création de la notice
29/01/2008 19:33
Dernière modification de la notice
20/08/2019 17:21
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