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Maiques O, Cuevas D, García Dios DA, Coenegrachts L, Santacana M, Velasco A, Romero M, Gatius S, Lambrechts D, Müller S, Pedersen HC, Dolcet X, Amant F, Matias-Guiu X. FISH analysis of PTEN in endometrial carcinoma. Comparison with SNP arrays and MLPA. Histopathology 2015; 65:371-88. [PMID: 25353038 PMCID: PMC4282383 DOI: 10.1111/his.12396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AIMS To check the usefulness of a standardized protocol of PTEN FISH in 31 endometrial carcinomas (ECs) in comparison with SNP array (SNPA), multiplex ligation-dependent probe amplification (MLPA), and immunohistochemistry. METHODS AND RESULTS Fluorescence in-situ hybridization analysis showed two PTEN copies in 17 cases, three copies in nine cases, hemizygous deletion in two cases, and diverse cell populations with different PTEN copy number in three cases. A good correlation was seen between FISH and SNPA, particularly in cases with three copies. FISH identified two cases with entire deletion of chromosome 10, but did not identify a focal deletion of PTEN. Five cases with PTEN deletion and duplication of the second allele by SNPA were interpreted as normal by FISH. Concordance between FISH and MLPA was seen in 15 cases with two copies, and in two cases with PTEN deletion. Six cases were interpreted as amplified by MLPA, but showed polyploidy by FISH. FISH was superior to SNPA and MLPA in assessing the tumours with diverse cell populations with different PTEN copies. CONCLUSIONS The results show good concordance between FISH, SNPA and MLPA. SNPA was superior in tumours with deletion of one copy and duplication of the second allele. FISH was superior in assessing tumour heterogeneity.
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Affiliation(s)
- Oscar Maiques
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Dolors Cuevas
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Diego Andrés García Dios
- Gynaecological Oncology, University Hospitals LeuvenLeuven, Belgium
- Department of Oncology, Katholieke Universiteit LeuvenLeuven, Belgium
| | - Lieve Coenegrachts
- Gynaecological Oncology, University Hospitals LeuvenLeuven, Belgium
- Department of Oncology, Katholieke Universiteit LeuvenLeuven, Belgium
| | - Maria Santacana
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Ana Velasco
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Marta Romero
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Sónia Gatius
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Diether Lambrechts
- Vesalius Research Centre, Vlaams Instituut voor BiotechnologieLeuven, Belgium
- Laboratory for Translational Genetics, Katholieke Universiteit LeuvenLeuven, Belgium
| | - Sven Müller
- Research and Development, Dako DenmarkGlostrup, Denmark
| | | | - Xavier Dolcet
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
| | - Frederic Amant
- Gynaecological Oncology, University Hospitals LeuvenLeuven, Belgium
- Department of Oncology, Katholieke Universiteit LeuvenLeuven, Belgium
| | - Xavier Matias-Guiu
- Department of Pathology and Molecular Genetics/Oncological Pathology Group, Hospital Universitari Arnau de Vilanova, Universitat de Lleida, IRB LleidaLleida, Spain
- Address for correspondence: X Matias-Guiu, PhD, Hospital Universitari Arnau de Vilanova, Av. Rovira Roure, 80, 25198 Lleida, Spain. e-mail:
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