Antonios Valachis
Position: Adjunct Senior Lecturer School/office: School of Medical SciencesEmail: YW50b25pb3MudmFsYWNoaXM7b3J1LnNl
Phone: No number available
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About Antonios Valachis
Antonios Valachis is Associate Professor of Oncology since 2018 and senior consultant at the Department of Oncology, Örebro University Hospital. His clinical work and research is focused on breast cancer and melanoma.
Research
Antonios conducts clinical research with different methods depending on the research question to be answered: epidemiological studies, observational studies, interventional studies and meta-analyses.
Ongoing research projects:
- Pharmacoepidemiological studies regarding potential interaction between cancer and non-cancer medication in breast cancer and risk for late toxicities after oncological treatment.
- Insights on the prognosis and molecular characterization of metaplastic breast cancer.
- Artificial intelligence Supporting CAncer Patients across Europé – the ASCAPE project (Funded by: H2020-SC1-DTH-2019 / Big data and Artificial Intelligence for monitoring health status and quality of life after the cancer treatment).
- Predictive factors during treatment with immunotherapy in patients with metastatic melanoma.
- Optimizing the neoadjuvant treatment strategies in breast cancer patients
- Immunotherapy in clinical practice
- Clinical and molecular prediktive factors for exceptional responders on targeted therapies in patients with metastatic breast cancer.
- Influenza vaccination in cancer patients treated with targeted therapies
A list of his ongoing research projects can be found here.
Appointments
- Member of the Priority Committee of the Uppsala-Örebro Regional Research Council
- Member of the Research Council, Region Örebro County
- Member of the Swedish Breast Cancer Group (SweBCG)
- Regional representative at the National Guidelines for breast cancer
- National representative (from the Swedish Society of Oncology) at the European Society of Medical Oncology (ESMO)
Research projects
Active projects
Publications
Articles in journals
- Ladjevardi, C. O. , Skribek, M. , Koliadi, A. , Rydén, V. , El-Naggar, A. I. , Digkas, E. , Valachis, A. & Ullenhag, G. J. (2024). Differences in immune-related toxicity between PD-1 and PD-L1 inhibitors: a retrospective cohort study in patients with advanced cancer. Cancer Immunology and Immunotherapy, 74 (1). [BibTeX]
- Valachis, A. , Biganzoli, L. , Christopoulou, A. , Fjermeros, K. , Fountzila, E. , Geisler, J. , Gomez-Bravo, R. , Karihtala, P. & et al. (2024). Implementing geriatric assessment for dose optimization of CDK4/6 inhibitors in older breast cancer patients. Future Oncology, 20 (37), 2937-2948. [BibTeX]
- Digkas, E. , Smith, D. , Wennstig, A. , Matikas, A. , Tegnelius, E. & Valachis, A. (2024). Incidence and risk factors of hypothyroidism after treatment for early breast cancer: a population-based cohort study. Breast Cancer Research and Treatment, 204 (1), 79-87. [BibTeX]
- Wickberg, Å. , Prag, C. , Valachis, A. , Karlsson, L. & Johansson, B. (2024). Intraoperative Radiation Therapy Delivered by Brachytherapy in Breast Cancer: An Interim Analysis of a Phase 2 Trial. Clinical Breast Cancer, 24 (3), 243-252. [BibTeX]
- Valachis, A. & Lindman, H. (2024). Lessons learned from an unsuccessful decentralized clinical trial in Oncology. npj Digital Medicine, 7 (1). [BibTeX]
- Kahlmeter Brandell, J. , Valachis, A. , Ugge, H. , Smith, D. & Johansson, B. (2024). Moderately hypofractionated prostate-only versus whole-pelvis radiotherapy for high-risk prostate cancer: A retrospective real-world single-center cohort study. Clinical and Translational Radiation Oncology, 48. [BibTeX]
- Olsson Ladjevardi, C. , Koliadi, A. , Rydén, V. , El-Naggar, A. I. , Digkas, E. , Valachis, A. & Ullenhag, G. J. (2024). Multiple immune-related adverse events secondary to checkpoint inhibitor therapy in patients with advanced cancer: association with treatment effectiveness. Frontiers in Oncology, 14. [BibTeX]
- Jafer, F. , Malki, S. , Akram, M. , Gulwarisdotter, T. , Karakatsanis, A. & Valachis, A. (2024). Postmastectomy radiation therapy in breast cancer patients with micrometastatic disease in sentinel node dissection: A cohort study and meta-analysis. Clinical and Translational Radiation Oncology, 46. [BibTeX]
- Rydén, V. , El-Naggar, A. I. , Koliadi, A. , Ladjevardi, C. O. , Digkas, E. , Valachis, A. & Ullenhag, G. J. (2024). The role of dacarbazine and temozolomide therapy after treatment with immune checkpoint inhibitors in malignant melanoma patients: A case series and meta-analysis. Pigment Cell & Melanoma Research, 37 (3), 352-362. [BibTeX]
- Ilić, M. , Ivanović, M. , Kurbalija, V. & Valachis, A. (2024). Towards optimal learning: Investigating the impact of different model updating strategies in federated learning. Expert systems with applications, 249 (Part A). [BibTeX]
- Schiza, A. , Fredriksson, I. , Sund, M. & Valachis, A. (2024). Treatment utilization and effectiveness of neoadjuvant chemotherapy comparing men and women diagnosed with breast cancer: a Swedish retrospective cohort study. Breast Cancer Research and Treatment, 203, 235-243. [BibTeX]
- Strell, C. , Smith, D. , Valachis, A. , Woldeyesus, H. , Wadsten, C. , Micke, P. , Fredriksson, I. & Schiza, A. (2024). Use of beta-blockers in patients with ductal carcinoma in situ and risk of invasive breast cancer recurrence: a Swedish retrospective cohort study. Breast Cancer Research and Treatment, 207 (2), 293-299. [BibTeX]
- Schiza, A. , Fredriksson, I. , Sund, M. & Valachis, A. (2023). De Novo metastatic breast cancer in males versus females: a Swedish, population-based cohort study. JNCI cancer spectrum, 7 (4). [BibTeX]
- Castelo-Branco, L. , Pellat, A. , Martins-Branco, D. , Valachis, A. , Derksen, J. W. G. , Suijkerbuijk, K. P. M. , Dafni, U. , Dellaporta, T. & et al. (2023). ESMO Guidance for Reporting Oncology real-World evidence (GROW). Annals of Oncology, 34 (12), 1097-1112. [BibTeX]
- Sund, M. , Garmo, H. , Andersson, A. , Margolin, S. , Ahlgren, J. & Valachis, A. (2023). Estrogen therapy after breast cancer diagnosis and breast cancer mortality risk. Breast Cancer Research and Treatment, 198 (2), 361-368. [BibTeX]
- Olsson Ladjevardi, C. , Koliadi, A. , Rydén, V. , Inan El-Naggar, A. , Digkas, E. , Valachis, A. & Ullenhag, G. J. (2023). Predicting immune-related adverse events using a simplified frailty score in cancer patients treated with checkpoint inhibitors: A retrospective cohort study. Cancer Medicine, 12 (12), 13217-13224. [BibTeX]
- Rodriguez-Wallberg, K. A. , Nilsson, H. P. , Bergh, J. , Malmros, J. , Ljungman, P. , Foukakis, T. , Stragliotto, C. L. , Friman, E. I. & et al. (2023). ProFertil study protocol for the investigation of gonadotropin-releasing hormone agonists (GnRHa) during chemotherapy aiming at fertility protection of young women and teenagers with cancer in Sweden-a phase III randomised double-blinded placebo-controlled study. BMJ Open, 13 (12). [BibTeX]
- Savic, M. , Kurbalija, V. , Ilic, M. , Ivanovic, M. , Jakovetic, D. , Valachis, A. , Autexier, S. , Rust, J. & et al. (2023). The Application of Machine Learning Techniques in Prediction of Quality of Life Features for Cancer Patients. Computer Science and Information Systems, 20 (1), 381-404. [BibTeX]
- Tzelves, L. , Manolitsis, I. , Varkarakis, I. , Ivanovic, M. , Kokkonidis, M. , Useros, C. S. , Kosmidis, T. , Muñoz, M. & et al. (2022). Artificial intelligence supporting cancer patients across Europe - The ASCAPE project. PLOS ONE, 17 (4). [BibTeX]
- Mauri, D. , Valachis, A. & Tolia, M. (2022). COVID-19 Vaccinations: Summary Guidance for Cancer Patients in 28 Languages: Breaking Barriers to Cancer Patient Information. Reviews on recent clinical trials, 17 (1), 11-14. [BibTeX]
- Ohlsson-Nevo, E. , Arvidsson Lindvall, M. , Hellerstedt Börjeson, S. , Hagberg, L. , Hultgren Hörnquist, E. , Valachis, A. , Wickberg, Å. & Duberg, A. (2022). Digitally distributed Yoga Intervention in Breast Cancer Rehabilitation (DigiYoga CaRe): protocol for a randomised controlled trial. BMJ Open, 12 (11). [BibTeX]
- Mauri, D. , Kamposioras, K. , Matthaios, D. , Tolia, M. , Nixon, I. , Dambrosio, M. , Zarkavelis, G. , Papadimitriou, K. & et al. (2022). Next-Generation Sequencing of Circulating Tumor DNA Can Optimize Second-Line Treatment in RAS Wild-Type Metastatic Colorectal Cancer after Progression on anti-EGFR Therapy: Time to Rethink Our Approach. Oncology Research and Treatment, 45 (4), 216-220. [BibTeX]
- Löfgren, D. , Valachis, A. & Olivecrona, M. (2022). Older meningioma patients: a retrospective population-based study of risk factors for morbidity and mortality after neurosurgery.. Acta Neurochirurgica, 164, 2987-2997. [BibTeX]
- Valachis, A. , Carlqvist, P. , Ma, Y. , Szilcz, M. , Freilich, J. , Vertuani, S. , Holm, B. & Lindman, H. (2022). Overall survival of patients with metastatic breast cancer in Sweden: a nationwide study. British Journal of Cancer, 127 (4), 720-725. [BibTeX]
- Olsén, J. S. , Estefan, D. , Valachis, A. , Jakobsson, F. , Karlsson, L. & Johansson, B. (2022). Predicting toxicity caused by high-dose-rate brachytherapy single boost for prostate cancer. Journal of Contemporary Brachytherapy, 14 (1), 7-14. [BibTeX]
- Naeser, Y. , Helgadottir, H. , Hansson, J. , Ingvar, C. , Elander, N. O. , Flygare, P. , Nilsson, C. , Jakobsson, F. & et al. (2022). Quality of Life in the First Year of Follow-Up in a Randomized Multicenter Trial Assessing the Role of Imaging after Radical Surgery of Stage IIB-C and III Cutaneous Melanoma (TRIM Study). Cancers, 14 (4). [BibTeX]
- Löfgren, D. , Valachis, A. & Olivecrona, M. (2022). Risk for morbidity and mortality after neurosurgery in older patients with high grade gliomas: a retrospective population based study. BMC Geriatrics, 22 (1). [BibTeX]
- Sund, M. , Garcia-Argibay, M. , Garmo, H. , Ahlgren, J. , Wennstig, A. , Fredriksson, I. , Lindman, H. & Valachis, A. (2021). Aromatase inhibitors use and risk for cardiovascular disease in breast cancer patients: A population-based cohort study. Breast, 59, 157-164. [BibTeX]
- Karakatsanis, A. , Charalampoudis, P. , Pistioli, L. , Di Micco, R. , Foukakis, T. & Valachis, A. (2021). Axillary evaluation in ductal cancer in situ of the breast: challenging the diagnostic accuracy of clinical practice guidelines. British Journal of Surgery, 108 (9), 1120-1125. [BibTeX]
- Valachis, A. , Rosén, C. , Koliadi, A. , Digkas, E. , Gustavsson, A. , Nearchou, A. & Ullenhag, G. J. (2021). Improved survival without increased toxicity with influenza vaccination in cancer patients treated with checkpoint inhibitors. Oncoimmunology, 10 (1). [BibTeX]
- Schiza, A. , Mauri, D. , Fredriksson, I. , Wennstig, A. & Valachis, A. (2021). Predictive role of HER2-status on the effectiveness of endocrine adjuvant treatment in postmenopausal breast cancer patients: a population-based cohort study. Breast Cancer Research and Treatment, 186, 779-789. [BibTeX]
- Valachis, A. , Nyström, P. , Fredriksson, I. , Wennstig, A. & Ahlgren, J. (2021). Treatment patterns, risk for hospitalization and mortality in older patients with triple negative breast cancer. Journal of Geriatric Oncology, 12 (2), 212-218. [BibTeX]
- Valachis, A. , Carlqvist, P. , Szilcz, M. , Freilich, J. , Vertuani, S. , Holm, B. & Lindman, H. (2021). Use of classifiers to optimise the identification and characterisation of metastatic breast cancer in a nationwide administrative registry. Acta Oncologica, 60 (12), 1604-1610. [BibTeX]
- Mauri, D. , Tzachanis, D. , Valachis, A. , Kamposioras, K. , Tolias, M. , Dambrosio, M. , Zarkavelis, G. , Gkoura, S. & et al. (2020). Behind the numbers and the panic of a viral pandemic: fixed restrictive oncology guidance may jeopardize patients' survival. Balkan Union of Oncology. Journal, 25 (3), 1277-1280. [BibTeX]
- Valachis, A. , Garmo, H. , Fredriksson, I. , Sund, M. , Lagerqvist, B. & Holmberg, L. (2020). Bleeding risk in breast cancer patients during concomitant administration of warfarin and tamoxifen: A population-based nested case-control study. The Breast Journal, 26 (5), 981-987. [BibTeX]
- Joona, T. B. , Digkas, E. , Wennstig, A. , Nyström, K. , Nearchou, A. , Nilsson, C. , Pauksens, K. & Valachis, A. (2020). Influenza vaccination in breast cancer patients during subcutaneous trastuzumab in adjuvant setting. Breast Cancer Research and Treatment, 184 (1), 45-52. [BibTeX]
- Mauri, D. , Kamposioras, K. , Tzachanis, D. , Tolia, M. , Valachis, A. , Dambrosio, M. , Alongi, F. , De Mello, R. A. & et al. (2020). Patient and family support in the era of fake e-medicine: Food for thought from an international consensus panel. ESMO Open, 5 (2). [BibTeX]
- Matikas, A. , Zerdes, I. , Lövrot, J. , Sifakis, E. , Richard, F. , Sotiriou, C. , Rassidakis, G. , Bergh, J. & et al. (2020). PD-1 protein and gene expression as prognostic factors in early breast cancer. ESMO Open, 5 (6). [BibTeX]
- Kofteridis, D. P. , Andrianaki, A. M. , Maraki, S. , Mathioudaki, A. , Plataki, M. , Alexopoulou, C. , Ioannou, P. , Samonis, G. & et al. (2020). Treatment pattern, prognostic factors, and outcome in patients with infection due to pan-drug-resistant gram-negative bacteria. European Journal of Clinical Microbiology and Infectious Diseases, 39 (5), 965-970. [BibTeX]
- Naeser, Y. , Helgadottir, H. , Brandberg, Y. , Hansson, J. , Bagge, R. O. , Elander, N. O. , Ingvar, C. , Isaksson, K. & et al. (2020). TRIM study protocol: prospective randomized multicenter Trial to assess the Role of Imaging during follow-up after radical surgery of stage IIB-C and III cutaneous malignant Melanoma. BMC Cancer, 20 (1). [BibTeX]
- Jonsson, G. , Philipson, L. , Villman, K. & Valachis, A. (2020). Upfront Radiotherapy in Patients With Asymptomatic Incurable Rectal Cancer: A Retrospective Cohort Study. Anticancer Research, 40 (10), 5853-5860. [BibTeX]
- Mörth, C. , Valachis, A. , Abu Sabaa, A. , Marshall, K. , Hedström, G. , Flogegård, M. , Baecklund, E. & Enblad, G. (2019). Autoimmune disease in patients with diffuse large B-cell lymphoma: occurrence and impact on outcome. Acta Oncologica, 58 (8), 1170-1177. [BibTeX]
- Mauri, D. , Tsali, L. , Polyzos, N. P. , Valachis, A. , Zafeiria, G. , Kalopita, K. , Tsiara, A. , Yerolatsite, M. & et al. (2019). Facing internet fake-medicine and web para-pharmacy in the total absence of official recommendations from medical societies. Journal of B.U.ON. : official journal of the Balkan Union of Oncology, 24 (4), 1314-1325. [BibTeX]
- Mauri, D. , Zafeiri, G. , Yerolatsite, M. , Tsali, L. , Zarkavelis, G. , Tsiara, A. , Polyzos, N. P. , Valachis, A. & et al. (2019). Global coverage and consistency of guideline recommendations for cancer cachexia on the Web in 2011 and 2018. Contemporary Oncology / Wspólczesna Onkologia, 23 (2), 100-109. [BibTeX]
- Mjelstad, A. , Zakariasson, G. & Valachis, A. (2019). Optimizing antiresorptive treatment in patients with bone metastases: time to initiation, switching strategies, and treatment duration. Supportive Care in Cancer, 27 (10), 3859-3867. [BibTeX]
- Valachis, A. , Sundqvist, M. , Carlsson, L. , Li, B. , Chiesa, F. , Uhde, M. & Sanglier, T. (2019). Use of subcutaneous and intravenous trastuzumab: real-world experience from three hospitals in Sweden. Future Oncology, 15 (23), 2733-2741. [BibTeX]
- Mörth, C. , Valachis, A. , Sabaa, A. A. , Molin, D. , Flogegård, M. & Enblad, G. (2018). Does the omission of vincristine in patients with diffuse large B cell lymphoma affect treatment outcome?. Annals of Hematology, 97, 2129-2135. [BibTeX]
- Colleoni, M. , Luo, W. , Karlsson, P. , Chirgwin, J. , Aebi, S. , Jerusalem, G. , Neven, P. , Hitre, E. & et al. (2018). Extended adjuvant intermittent letrozole versus continuous letrozole in postmenopausal women with breast cancer (SOLE): a multicentre, open-label, randomised, phase 3 trial. The Lancet Oncology, 19 (1), 127-138. [BibTeX]
- Zewenghiel, L. , Lindman, H. & Valachis, A. (2018). Impact of body mass index on the efficacy of endocrine therapy in patients with metastatic breast cancer: A retrospective two-center cohort study. Breast, 40, 136-140. [BibTeX]
- Valachis, A. , Mamounas, E. P. , Mittendorf, E. A. , Hayashi, N. , Ishitobi, M. , Natoli, C. , Fitzal, F. , Rubio, I. T. & et al. (2018). Risk factors for locoregional disease recurrence after breast-conserving therapy in patients with breast cancer treated with neoadjuvant chemotherapy: An international collaboration and individual patient meta-analysis. Cancer, 124 (14), 2923-2930. [BibTeX]
- Kofteridis, D. P. , Valachis, A. , Dimopoulou, D. , Andrianaki, A. M. , Christidou, A. , Maraki, S. , Spernovasilis, N. A. & Samonis, G. (2017). Factors Influencing Non-albicans Candidemia: A Case-Case-Control Study. Mycopathologia, 182 (7-8), 665-672. [BibTeX]
- Valachis, A. , Garmo, H. , Weinman, J. , Fredriksson, I. , Ahlgren, J. , Sund, M. & Holmberg, L. (2016). Effect of selective serotonin reuptake inhibitors use on endocrine therapy adherence and breast cancer mortality: a population-based study. Breast Cancer Research and Treatment, 159 (2), 293-303. [BibTeX]
Articles, reviews/surveys
- Karihtala, P. , Schiza, A. , Fountzilas, E. , Geisler, J. , Meattini, I. , Risi, E. , Biganzoli, L. & Valachis, A. (2024). Clinical trials in older patients with cancer: typical challenges, possible solutions, and a paradigm of study design in breast cancer. Acta Oncologica, 63, 441-447. [BibTeX]
- Frid, S. , Amat-Fernández, C. , Fuentes-Expósito, M. Á. , Muñoz-Mateu, M. , Valachis, A. , Sisó-Almirall, A. & Grau-Corral, I. (2024). Mapping the Evidence on the Impact of mHealth Interventions on Patient-Reported Outcomes in Patients With Breast Cancer: A Systematic Review. JCO Clinical Cancer Informatics, 8. [BibTeX]
- Rosin, J. , Svegrup, E. , Valachis, A. & Zerdes, I. (2023). Discordance of PIK3CA mutational status between primary and metastatic breast cancer: a systematic review and meta-analysis. Breast Cancer Research and Treatment, 201 (2), 161-169. [BibTeX]
- Pantiora, E. , Tasoulis, M. K. , Valachis, A. , Eriksson, S. , Kühn, T. , Karakatsanis, A. & Rubio, I. T. (2023). Evolution and refinement of magnetically guided sentinel lymph node detection in breast cancer: meta-analysis. British Journal of Surgery, 110 (4), 410-419. [BibTeX]
- Kastora, S. L. , Holmquist, A. , Valachis, A. , Rocco, N. , Meattini, I. , Somaiah, N. , Peled, A. , Chatterjee, A. & et al. (2023). Outcomes of Different Quality of Life Assessment Modalities After Breast Cancer Therapy: A Network Meta-analysis. JAMA Network Open, 6 (6). [BibTeX]
- Tollan, C. J. , Pantiora, E. , Valachis, A. , Karakatsanis, A. & Tasoulis, M. K. (2022). A Systematic Review and Meta-Analysis on the Role of Repeat Breast-Conserving Surgery for the Management of Ipsilateral Breast Cancer Recurrence. Annals of Surgical Oncology, 29 (10), 6440-6453. [BibTeX]
- Nikyar, N. , Tegnelius, E. & Valachis, A. (2022). Adjuvant locoregional radiation therapy in breast cancer patients with pathologic complete response after neoadjuvant chemotherapy: A systematic review and meta-analysis. Clinical and Translational Radiation Oncology, 33, 45-52. [BibTeX]
- Bergman, M. , Fountoukidis, G. , Smith, D. , Ahlgren, J. , Lambe, M. & Valachis, A. (2022). Effect of Smoking on Treatment Efficacy and Toxicity in Patients with Cancer: A Systematic Review and Meta-Analysis. Cancers, 14 (17). [BibTeX]
- Zhu, Y. , Tzoras, E. , Matikas, A. , Bergh, J. , Valachis, A. , Zerdes, I. & Foukakis, T. (2022). Expression patterns and prognostic implications of tumor-infiltrating lymphocytes dynamics in early breast cancer patients receiving neoadjuvant therapy: A systematic review and meta-analysis. Frontiers in Oncology, 12. [BibTeX]
- Digkas, E. , Tabiim, A. J. , Smith, D. & Valachis, A. (2022). Randomized Versus Real-World Evidence on the Efficacy and Toxicity of Checkpoint Inhibitors in Cancer in Patients with Advanced Non-small Cell Lung Cancer or Melanoma: A Meta-analysis. Targeted oncology, 17 (5), 507-515. [BibTeX]
- Smith, D. , Sepehr, S. , Karakatsanis, A. , Strand, F. & Valachis, A. (2022). Yield of Surveillance Imaging After Mastectomy With or Without Reconstruction for Patients With Prior Breast Cancer: A Systematic Review and Meta-analysis. JAMA Network Open, 5 (12). [BibTeX]
- Boman, C. , Zerdes, I. , Mårtensson, K. , Bergh, J. , Foukakis, T. , Valachis, A. & Matikas, A. (2021). Discordance of PD-L1 status between primary and metastatic breast cancer: A systematic review and meta-analysis. Cancer Treatment Reviews, 99. [BibTeX]
- Mokhtary, A. , Karakatsanis, A. & Valachis, A. (2021). Mammographic Density Changes over Time and Breast Cancer Risk: A Systematic Review and Meta-Analysis. Cancers, 13 (19). [BibTeX]
- Paakkola, N. , Karakatsanis, A. , Mauri, D. , Foukakis, T. & Valachis, A. (2021). The prognostic and predictive impact of low estrogen receptor expression in early breast cancer: a systematic review and meta-analysis. ESMO Open, 6 (6). [BibTeX]
- Kamposioras, K. , Mauri, D. , Papadimitriou, K. , Anthoney, A. , Hindi, N. , Petricevic, B. , Dambrosio, M. , Valachis, A. & et al. (2020). Synthesis of Recommendations From 25 Countries and 31 Oncology Societies: How to Navigate Through Covid-19 Labyrinth. Frontiers in Oncology, 10. [BibTeX]
- Matikas, A. , Zerdes, I. , Lövrot, J. , Richard, F. , Sotiriou, C. , Bergh, J. , Valachis, A. & Foukakis, T. (2019). Prognostic implications of PD-L1 expression in breast cancer: systematic review and meta-analysis of immunohistochemistry and pooled analysis of transcriptomic data. Clinical Cancer Research, 25 (18), 5717-5726. [BibTeX]
- Valachis, A. & Ullenhag, G. J. (2017). Discrepancy in BRAF status among patients with metastatic malignant melanoma: A meta-analysis. European Journal of Cancer, 81, 106-115. [BibTeX]
Conference papers
- Ohlsson-Nevo, E. , Arvidsson Lindvall, M. , Hellerstedt Börjesson, S. , Hagberg, L. , Hultgren Hörnquist, E. , Valachis, A. , Wickberg, Å. & Duberg, A. (2023). A Digitally Distributed Yoga Intervention in Breast Cancer Rehabilitation (DigiYogaCaRe): Protocol for a Randomized Controlled Trial. Paper presented at Nordic Conference in Nursing Research, Reykjavik, Iceland, 2-4 October, 2023. [BibTeX]
- Pellat, A. , Grinda, T. , Prelaj, A. , Cresta, P. , Valachis, A. , Zerdes, I. , Branco, D. M. , Provenzano, L. & et al. (2023). Comprehensive mapping review of real-world evidence publications focusing on targeted therapies in solid tumors: A collaborative work from ESMO real-world data and Digital Health Working Group. In: Annals of Oncology. Paper presented at Annual Meeting of the European-Society-for-Medical-Oncology (ESMO), Barcelona, Spain, October 20-24, 2023. (pp. S925-S925). Elsevier. [BibTeX]
- Valachis, A. , Lindman, H. , Lauppe, R. , Lilja, M. , Jakobsson, M. & Nyqvist, D. (2023). Palbociclib dose patterns in Swedish patients with metastatic breast cancer: 5-year update from the SIRI study. In: Annals of Oncology. Paper presented at Annual Meeting of the European-Society-for-Medical-Oncology (ESMO), Barcelona, Spain, October 20-24, 2023. (pp. S362-S362). Elsevier. [BibTeX]
- Derksen, J. W. G. , Branco, D. M. , Pellat, A. , Van Nassau, S. C. M. W. , Valachis, A. , Aggarwal, A. , Koopman, M. , Pentheroudakis, G. & et al. (2023). Real-world evidence contributions to European medicines agency's safety and efficacy evaluations of oncology targeted therapies between 2018-2022. In: Annals of Oncology. Paper presented at Annual Meeting of the European-Society-for-Medical-Oncology (ESMO), Barcelona, Spain, October 20-24, 2023. (pp. S930-S930). Elsevier. [BibTeX]
- Tollan, C. J. , Pantiora, E. , Valachis, A. , Karakatsanis, A. & Tasoulis, M. K. (2022). ASO Visual Abstract: A Systematic Review and Meta-analysis on the Role of Repeat Breast-Conserving Surgery for the Management of Ipsilateral Breast Cancer Recurrence.. In: Annals of Surgical Oncology. Springer. [BibTeX]
- Karihtala, P. , Valachis, A. , Tuxen, M. & Geisler, J. (2022). Current treatment landscape of HR+/HER2-advanced breast cancer in the Nordics: A modified Delphi study. In: Annals of Oncology. Paper presented at ESMO Breast Cancer 2022, Berlin, Germany, May 3-5, 2022. (pp. S218-S218). Elsevier. [BibTeX]
- Nicolaescu, T. , Abu Sabaa, A. , Hedell, K. , Morth, C. , Valachis, A. & Enblad, G. (2022). Prognostic relevance of pre-treatment c-reactive protein to albumin ratio in patients with diffuse large b cell lymphoma. In: Annals of Oncology. Paper presented at Annual Meeting of the European-Society-for-Medical-Oncology (ESMO), Paris, France, September 9-13, 2022. (pp. S832-S832). Elsevier. [BibTeX]
- Isheden, G. , Dalén, J. , Holm, B. , Lindman, H. , Valachis, A. & Vertuani, S. (2022). SWEDISH NATIONWIDE REGISTER DATA AS A LOW-COST RESOURCE TO DETECT DRUG-REPURPOSING SIGNALS: A STUDY ON DE NOVO METASTATIC BREAST CANCER PATIENTS. In: Value in Health. Paper presented at ISPOR Europe 2022, Vienna, Austria, November 6-9, 2022. (pp. S375-S375). Elsevier. [BibTeX]
- Zerdes, I. , Zhu, Y. , Tzoras, E. , Matikas, A. , Bergh, J. C. S. , Valachis, A. & Foukakis, T. (2022). Tumor-infiltrating lymphocytes (TILs) dynamics in breast cancer patients receiving neoadjuvant therapy: A systematic review and meta-analysis. In: Journal of Clinical Oncology. American Society of Clinical Oncology. [BibTeX]
- Lampropoulos, K. , Kosmidis, T. , Autexier, S. , Savic, M. , Athanatos, M. , Kokkonidis, M. , Koutsouri, T. , Vizitiu, A. & et al. (2021). ASCAPE: An open AI ecosystem to support the quality of life of cancer patients. In: 2021 IEEE 9th International Conference on Healthcare Informatics (ICHI). Paper presented at 9th IEEE International Conference on Healthcare Informatics (IEEE ICHI), Victoria, BC, Canada (Virtual conference), August 9-12, 2021. (pp. 301-310). IEEE Computer Society. [BibTeX]
- Valachis, A. , Lindman, H. , Wahl, H. F. , Lauppe, R. , Lilja, M. , Nyqvist, D. & Jakobsson, M. (2021). Palbociclib dose patterns in Swedish patients with metastatic breast cancer: Evidence from the SIRI study. In: Annals of Oncology. Elsevier. [BibTeX]
- Karakatsanis, A. , Foukakis, T. , Karlsson, P. , Mamounas, E. , Chagpar, A. , Boyages, J. , Rubio, I. , Naume, B. & et al. (2020). Axillary Staging in the Setting of a Preoperative Diagnosis of Ductal Cancer In Situ (DCIS): Results of an International Expert Panel and a Critical Guideline Performance Using Frequentist and Bayesian Analysis. In: Annals of Surgical Oncology. Springer. [BibTeX]
- Zerdes, I. , Matikas, A. , Lövrot, J. , Sifakis, E. G. , Richard, F. , Sotiriou, C. , Rassidakis, G. Z. , Bergh, J. C. S. & et al. (2020). PD-1 protein and gene expression in early breast cancer: Prognostic implications. In: Journal of Clinical Oncology. American Society of Clinical Oncology. [BibTeX]
- Kornalijnslijper-Altena, R. , Andersson, A. , Brandberg, Y. , Kessler, L. E. , Elinder, E. , Hartman, J. , Hellstrom, M. , Johansson, H. & et al. (2020). PREDIX II HER2: Improving pre-operative systemic therapy for human epidermal growth factor receptor 2 (HER2) amplified breast cancer (BC). In: Journal of Clinical Oncology. Paper presented at Annual Meeting of the American-Society-of-Clinical-Oncology (ASCO), Electronic Network, May 29-31, 2020. American Society of Clinical Oncology. [BibTeX]
- Matikas, A. , Zerdes, I. , Lovrot, J. , Richard, F. , Sotiriou, C. , Bergh, J. C. S. , Valachis, A. & Foukakis, T. (2019). Prognostic implications of PD-L1 expression in breast cancer at the protein and mRNA levels. In: Journal of Clinical Oncology. Paper presented at Annual Meeting of the American-Society-of-Clinical-Oncology (ASCO), Chicago, IL, USA, May 31 - June 4, 2019. American Society of Clinical Oncology. [BibTeX]
- Valachis, A. , Carlsson, L. , Sundqvist, M. , Li, B. , Chiesa, F. , Uhde, M. & Sanglier, T. (2019). Use of subcutaneous and intravenous trastuzumab: Real-world experience from three hospitals in Sweden. In: Cancer Research. Paper presented at San Antonio Breast Cancer Symposium, San Antonio, TX, USA, December 4-8, 2018. American Association for Cancer Research Inc.. [BibTeX]
Doctoral theses, comprehensive summaries
- Valachis, A. (2012). Meta-analysis of randomized clinical evidence of chemotherapy, radiotherapy and endocrine therapy in breast cancer. (Doctoral dissertation). (Comprehensive summary) Kreta, Greece: University of Crete. [BibTeX]