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Dumont J, Bou-Gharios J, Keller A, Chambrelant I, Pamart G, Mascaux C, Falcoz PE, Antoni D, Olland A, Pietta GA, Noël G. Impact of adjuvant radiotherapy and chemotherapy on thymoma. Cancer Radiother 2024; 28:174-181. [PMID: 38182482 DOI: 10.1016/j.canrad.2023.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 01/07/2024]
Abstract
PURPOSE Thymoma is a rare tumour. The most common treatment for thymoma is surgical resection, while the use of radiotherapy and chemotherapy remains controversial. PATIENTS AND METHODS We conducted a monocentric observational study of 31 patients diagnosed with thymoma from June 2004 to July 2020 at cancer centre in Strasbourg, France. We analysed the outcomes of the patients. RESULTS The 2- and 5- year locoregional relapse-free survival rates were 96.3% (95% confidence interval [CI]: 76.5-99.5%) and 68.0% (95% CI: 43.8-83.5%), respectively. Radiotherapy and chemotherapy significantly improved local tumour control (P=0.0008 and 0.04, respectively), while a larger initial tumour size significantly worsened local control rates (P=0.04). The 5- and 10-year overall survival rates were 87.1% (95% CI: 69.2-95%) and 81.7% (95% CI: 60.3-92.2%), respectively. The median overall survival was not reached, and no favourable factor was retrieved. For relapsed patients, the median overall survival after relapse was 115 months. CONCLUSION Despite the inherent limitations of retrospective studies with a limited patient sample size, we demonstrated that chemotherapy and radiotherapy in addition to surgery were effective in achieving local control and contributed to improving patient outcomes in thymoma. Notably, an aggressive treatment strategy at the time of relapse resulted in favourable outcomes for retreated patients.
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Affiliation(s)
- J Dumont
- Chest Diseases Department, Hôpital Hautepierre, hôpitaux universitaires de Strasbourg, 1, place de l'Hôpital, 67000 Strasbourg, France
| | - J Bou-Gharios
- Radiation Therapy Department, Institut de cancérologie Strasbourg Europe (ICANS), 17, rue Albert-Calmette, 67200 Strasbourg, France
| | - A Keller
- Radiation Therapy Department, Oncopole, Toulouse, France
| | - I Chambrelant
- Radiation Therapy Department, Institut de cancérologie Strasbourg Europe (ICANS), 17, rue Albert-Calmette, 67200 Strasbourg, France
| | - G Pamart
- Chest Diseases Department, Hôpital Hautepierre, hôpitaux universitaires de Strasbourg, 1, place de l'Hôpital, 67000 Strasbourg, France
| | - C Mascaux
- Chest Diseases Department, Hôpital Hautepierre, hôpitaux universitaires de Strasbourg, 1, place de l'Hôpital, 67000 Strasbourg, France
| | - P-E Falcoz
- Department of Thoracic Surgery, Hôpital Hautepierre, hôpitaux universitaires de Strasbourg, 1, place de l'Hôpital, 67200 Strasbourg, France
| | - D Antoni
- Radiation Therapy Department, Institut de cancérologie Strasbourg Europe (ICANS), 17, rue Albert-Calmette, 67200 Strasbourg, France
| | - A Olland
- Department of Thoracic Surgery, Hôpital Hautepierre, hôpitaux universitaires de Strasbourg, 1, place de l'Hôpital, 67200 Strasbourg, France
| | - G A Pietta
- Radiation Therapy Department, Institut de cancérologie Strasbourg Europe (ICANS), 17, rue Albert-Calmette, 67200 Strasbourg, France
| | - G Noël
- Radiation Therapy Department, Institut de cancérologie Strasbourg Europe (ICANS), 17, rue Albert-Calmette, 67200 Strasbourg, France.
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Stergiou IE, Palamaris K, Levidou G, Tzimou M, Papadakos SP, Mandrakis G, Masaoutis C, Rontogianni D, Theocharis S. PD-L1 Expression in Neoplastic and Immune Cells of Thymic Epithelial Tumors: Correlations with Disease Characteristics and HDAC Expression. Biomedicines 2024; 12:772. [PMID: 38672128 PMCID: PMC11048374 DOI: 10.3390/biomedicines12040772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/26/2024] [Accepted: 03/28/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Programmed death-ligand 1 (PD-L1) expression in neoplastic and immune cells of the tumor microenvironment determines the efficacy of antitumor immunity, while it can be regulated at the epigenetic level by various factors, including HDACs. In this study, we aim to evaluate the expression patterns of PD-L1 in thymic epithelial tumors (TETs), while we attempt the first correlation analysis between PD-L1 and histone deacetylases (HDACs) expression. METHODS Immunohistochemistry was used to evaluate the expression of PD-L1 in tumor and immune cells of 91 TETs with SP263 and SP142 antibody clones, as well as the expressions of HDCA1, -2, -3, -4, -5, and -6. RESULTS The PD-L1 tumor proportion score (TPS) was higher, while the immune cell score (IC-score) was lower in the more aggressive TET subtypes and in more advanced Masaoka-Koga stages. A positive correlation between PD-L1 and HDAC-3, -4, and -5 cytoplasmic expression was identified. CONCLUSIONS Higher PD-L1 expression in neoplastic cells and lower PD-L1 expression in immune cells of TETs characterizes more aggressive and advanced neoplasms. Correlations between PD-L1 and HDAC expression unravel the impact of epigenetic regulation on the expression of immune checkpoint molecules in TETs, with possible future applications in combined therapeutic targeting.
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Affiliation(s)
- Ioanna E. Stergiou
- Department of Pathophysiology, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece;
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Kostas Palamaris
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Georgia Levidou
- Second Department of Pathology, Paracelsus Medical University, 90419 Nurenberg, Germany
| | - Maria Tzimou
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Stavros P. Papadakos
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Georgios Mandrakis
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Christos Masaoutis
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
| | - Dimitra Rontogianni
- Department of Pathology, Evangelismos General Hospital of Athens, 10676 Athens, Greece;
| | - Stamatios Theocharis
- First Department of Pathology, School of Medicine, National and Kapodistrian University of Athens, 10679 Athens, Greece; (K.P.); (M.T.); (S.P.P.); (G.M.); (C.M.)
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Lang M, Kazdal D, Mohr I, Anamaterou C. Differences and similarities of GTF2I mutated thymomas in different Eurasian ethnic groups. Transl Lung Cancer Res 2023; 12:1842-1844. [PMID: 37854159 PMCID: PMC10579828 DOI: 10.21037/tlcr-23-396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/06/2023] [Indexed: 10/20/2023]
Affiliation(s)
- Matthias Lang
- Department of General, Visceral, and Transplantation Surgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Daniel Kazdal
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
- Translational Lung Research Center (TLRC) Heidelberg, German Center for Lung Research (DZL), Heidelberg, Germany
| | - Isabelle Mohr
- Department of Internal Medicine IV, Department of Gastroenterology, University Hospital Heidelberg, Heidelberg, Germany
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