Renata Zahu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Renata Zahu has a total of 69 co-authors. Here are the top co-authors by number of shared publications:
- Gabriel Kacso
Department of Oncology and Radiotherapy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania
3 shared publications - Daniela Elena Sturzu
Amethyst Radiotherapy Center Cluj, 407280 Florești, Romania
2 shared publications Daniela Urian
Amethyst Radiotherapy Center Cluj, Florești, 407280, Romania
2 shared publications- Loredana Gabriela Marcu
Faculty of Informatics & Science, University of Oradea, Oradea, Romania
2 shared publications - Adriana Neagos
Department of Otorhinolaryngology, George Emil Palade University of Medicine, Pharmacy, Science and Technology, 540139 Târgu Mureș, Romania
1 shared publication Alex Bonciu
Department of Oncology and Radiotherapy, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
1 shared publication
Latest Publications
- Open Access
- 7 February 2026
- Published by Elsevier in Medical Dosimetry
Anatomy-based definition of posterior neck in head and neck VMAT plan optimization as potential new organ at risk
- 7 February 2026
- Published by Elsevier in Medical Dosimetry
Open AccessAnatomy-based definition of posterior neck in head and neck VMAT plan optimization as potential new organ at risk
- Open Access
Patient-Reported Financial Burden in Head and Neck Cancer Undergoing Radiotherapy
Background/Objectives: Financial toxicity (FT) refers to the financial burden directly or indirectly caused by a patient’s medical care. Patients with head and neck cancer (HNC) are particularly vulnerable to FT due to lower rates of return to work and higher out-of-pocket payments (OOPP). In this cross-sectional study, we assessed the amount and types of OOPP, as well as the prevalence of FT, in HNC patients who had completed curative radiotherapy. Methods: We included HNC patients who underwent curative-intent radiotherapy at four private clinics in Romania, within 12 months of completing treatment. Participants completed a 25-item questionnaire capturing sociodemographic information, insurance status, income, and OOPP. To assess subjective FT, we used the validated nine-item Financial Index of Toxicity (FIT), which measures three FT domains: financial stress, financial strain, and lost productivity. Each domain and the total score range from 0 to 100, with higher scores indicating greater financial toxicity. Descriptive statistics were used to summarize patient characteristics. Pearson’s chi-square, t-tests, and one-way ANOVA were used to assess statistical associations, with a significance threshold of p < 0.05. Results: Among 113 patients (mean age: 59), the majority were male (74.3%) and married (74.3%), with 40% having completed university or higher education. The most frequent tumor sites were the oropharynx (29 cases), larynx (22), and oral cavity (21). Concurrent chemoradiation was the most common treatment modality (47%). The mean total FT score was 18.8. Overall, 39.8% of patients experienced financial toxicity, and 29.2% scored above the mean in financial stress. Moderate financial strain (score > 21) was reported by 39.8% of participants, and approximately one-third reported loss of productivity. Transportation and nutritional supplements were the most common OOPP categories. Notably, 42% of patients spent at least 400 euros—equivalent to Romania’s monthly minimum income—on transportation during radiotherapy. FT was significantly associated with employment and marital status, but not with tumor site or treatment type. Conclusions: Among Romanian HNC patients treated with curative radiotherapy, we found substantial OOPP, particularly for transportation and nutritional supplements. While overall FT levels were moderate, divorced patients and those retired due to other chronic conditions were the most vulnerable to financial distress. Financial toxicity can directly affect treatment adherence, survival, and quality of life. By integrating financial counseling, social support, and broader coverage of treatment-related expenses, healthcare systems can mitigate FT for these patients.
Open AccessPatient-Reported Financial Burden in Head and Neck Cancer Undergoing Radiotherapy
Background/Objectives: Financial toxicity (FT) refers to the financial burden directly or indirectly caused by a patient’s medical care. Patients with head and neck cancer (HNC) are particularly vulnerable to FT due to lower rates of return to work and higher out-of-pocket payments (OOPP). In this cross-sectional study, we assessed the amount and types of OOPP, as well as the prevalence of FT, in HNC patients who had completed curative radiotherapy. Methods: We included HNC patients who underwent curative-intent radiotherapy at four private clinics in Romania, within 12 months of completing treatment. Participants completed a 25-item questionnaire capturing sociodemographic information, insurance status, income, and OOPP. To assess subjective FT, we used the validated nine-item Financial Index of Toxicity (FIT), which measures three FT domains: financial stress, financial strain, and lost productivity. Each domain and the total score range from 0 to 100, with higher scores indicating greater financial toxicity. Descriptive statistics were used to summarize patient characteristics. Pearson’s chi-square, t-tests, and one-way ANOVA were used to assess statistical associations, with a significance threshold of p < 0.05. Results: Among 113 patients (mean age: 59), the majority were male (74.3%) and married (74.3%), with 40% having completed university or higher education. The most frequent tumor sites were the oropharynx (29 cases), larynx (22), and oral cavity (21). Concurrent chemoradiation was the most common treatment modality (47%). The mean total FT score was 18.8. Overall, 39.8% of patients experienced financial toxicity, and 29.2% scored above the mean in financial stress. Moderate financial strain (score > 21) was reported by 39.8% of participants, and approximately one-third reported loss of productivity. Transportation and nutritional supplements were the most common OOPP categories. Notably, 42% of patients spent at least 400 euros—equivalent to Romania’s monthly minimum income—on transportation during radiotherapy. FT was significantly associated with employment and marital status, but not with tumor site or treatment type. Conclusions: Among Romanian HNC patients treated with curative radiotherapy, we found substantial OOPP, particularly for transportation and nutritional supplements. While overall FT levels were moderate, divorced patients and those retired due to other chronic conditions were the most vulnerable to financial distress. Financial toxicity can directly affect treatment adherence, survival, and quality of life. By integrating financial counseling, social support, and broader coverage of treatment-related expenses, healthcare systems can mitigate FT for these patients.
- Open Access
- 1 July 2025
- Published by Elsevier in Physica Medica
- Vol. 136, 105036
Is the use of machine learning in head and neck cancer radiotherapy supported by clinical trials?
- 1 July 2025
- Published by Elsevier in Physica Medica
- Vol. 136, 105036
Open AccessIs the use of machine learning in head and neck cancer radiotherapy supported by clinical trials?
- Open Access
- 14 April 2025
- Published by Clujul Medical in Medicine and Pharmacy Reports
- Vol. 98 (2) , 196-202
Return to work of head and neck cancer patients after curative radiotherapy
Background. Our objective was to evaluate the rate of reemployment after having curative radiotherapy for head and neck cancer and to identify the barriers of successful return to work in this patient population. Methods. The study was retrospective, cross-sectional, analytical and cohort type, it included 52 consecutive patients attending follow-up visits after curative radiotherapy for head and neck cancer at a single tertiary center. Participants completed a survey to assess demographics, tumor characteristics, lifestyle choices and quality of life questionnaires. We analyzed the rate of reemployment and the association with different parameters. Results. At the time of the survey, the successful return to work rate among head and neck cancer survivors was 55.8%. Most of the returners, 93%, started to work within 14 months from the time of the diagnosis. Educational level, work type and tumor stage were predictive for successful return to work. The main barriers for reemployment were physical symptoms such as fatigue, speech disorders and eating problems. Conclusions. Head and neck cancer survivors who manage to return to work have a better quality of life and global health status than those who could not return. The most vulnerable patients are those with lower education, doing manual work and with advanced stage cancer. Optimized radiotherapy planning to reduce radiation induced late effects in conjunction with coordinated rehabilitation programs are needed to facilitate head and neck cancer survivors’ reemployment.
- 14 April 2025
- Published by Clujul Medical in Medicine and Pharmacy Reports
- Vol. 98 (2) , 196-202
Open AccessReturn to work of head and neck cancer patients after curative radiotherapy
Background. Our objective was to evaluate the rate of reemployment after having curative radiotherapy for head and neck cancer and to identify the barriers of successful return to work in this patient population. Methods. The study was retrospective, cross-sectional, analytical and cohort type, it included 52 consecutive patients attending follow-up visits after curative radiotherapy for head and neck cancer at a single tertiary center. Participants completed a survey to assess demographics, tumor characteristics, lifestyle choices and quality of life questionnaires. We analyzed the rate of reemployment and the association with different parameters. Results. At the time of the survey, the successful return to work rate among head and neck cancer survivors was 55.8%. Most of the returners, 93%, started to work within 14 months from the time of the diagnosis. Educational level, work type and tumor stage were predictive for successful return to work. The main barriers for reemployment were physical symptoms such as fatigue, speech disorders and eating problems. Conclusions. Head and neck cancer survivors who manage to return to work have a better quality of life and global health status than those who could not return. The most vulnerable patients are those with lower education, doing manual work and with advanced stage cancer. Optimized radiotherapy planning to reduce radiation induced late effects in conjunction with coordinated rehabilitation programs are needed to facilitate head and neck cancer survivors’ reemployment.
- Open Access
- 11 February 2025
- Published by MDPI AG in Journal of Clinical Medicine
- Vol. 14 (4) , 1177
Clinical Outcomes for Nasopharyngeal Cancer in Non-Asian Patients: A Single-Center Experience
Background/Objectives: According to Globocan, Romania has the highest incidence of nasopharyngeal cancer (NPC) in Europe. Our objective was to evaluate the survival data for a cohort of non-Asian patient population treated with curative intent at a tertiary cancer center in Romania. Methods: We retrospectively analyzed 161 patients with histologically proven, non-metastatic NPC treated at our institution between October 2014 and December 2021 with intensity modulated arc radiotherapy (IMRT) with or without neoadjuvant or concomitant chemotherapy according to the stage of the disease. Kaplan-Meier estimates of overall, disease-free, locoregional relapse free and distant metastasis free survival were calculated. The log-rank test was used to determine significant prognostic determinants of overall and disease-free survival. Results: The median age was 50 years (range 19–80), 88% had nonkeratinizing undifferentiated carcinoma. Epstein Barr virus status was not evaluated routinely. 42.2% of patients were stage III and 46% stage IVA disease. Induction chemotherapy was prescribed for 72.7% of patients and 89.4% received concurrent chemotherapy. After a median follow up of 44 months (range: 3.6, 104.7 months), the estimated 3 years overall, disease free, locoregional relapse free and distant metastasis free survival of the entire cohort were 82.6%, 73.3%, 83.2% and 86.3% respectively. On testing interactions, concomitant chemotherapy offered significant survival benefit (HR—0.287; 95% CI 0.137–0.603; p = 0.001) and cumulative Cisplatin dose of more than 100 mg/mp was statistically significant for survival (HR—0.350;95% CI 0.157–0.779; p = 0.01) Conclusions: This is the largest retrospective series of nasopharyngeal cancer from Romania reporting survival data. Despite the high percentage of advanced stage disease our data shows very good disease control. Compliance to optimal concomitant chemotherapy should represent a priority in clinical practice in a non-Asian patient population.
- 11 February 2025
- Published by MDPI AG in Journal of Clinical Medicine
- Vol. 14 (4) , 1177
Open AccessClinical Outcomes for Nasopharyngeal Cancer in Non-Asian Patients: A Single-Center Experience
Background/Objectives: According to Globocan, Romania has the highest incidence of nasopharyngeal cancer (NPC) in Europe. Our objective was to evaluate the survival data for a cohort of non-Asian patient population treated with curative intent at a tertiary cancer center in Romania. Methods: We retrospectively analyzed 161 patients with histologically proven, non-metastatic NPC treated at our institution between October 2014 and December 2021 with intensity modulated arc radiotherapy (IMRT) with or without neoadjuvant or concomitant chemotherapy according to the stage of the disease. Kaplan-Meier estimates of overall, disease-free, locoregional relapse free and distant metastasis free survival were calculated. The log-rank test was used to determine significant prognostic determinants of overall and disease-free survival. Results: The median age was 50 years (range 19–80), 88% had nonkeratinizing undifferentiated carcinoma. Epstein Barr virus status was not evaluated routinely. 42.2% of patients were stage III and 46% stage IVA disease. Induction chemotherapy was prescribed for 72.7% of patients and 89.4% received concurrent chemotherapy. After a median follow up of 44 months (range: 3.6, 104.7 months), the estimated 3 years overall, disease free, locoregional relapse free and distant metastasis free survival of the entire cohort were 82.6%, 73.3%, 83.2% and 86.3% respectively. On testing interactions, concomitant chemotherapy offered significant survival benefit (HR—0.287; 95% CI 0.137–0.603; p = 0.001) and cumulative Cisplatin dose of more than 100 mg/mp was statistically significant for survival (HR—0.350;95% CI 0.157–0.779; p = 0.01) Conclusions: This is the largest retrospective series of nasopharyngeal cancer from Romania reporting survival data. Despite the high percentage of advanced stage disease our data shows very good disease control. Compliance to optimal concomitant chemotherapy should represent a priority in clinical practice in a non-Asian patient population.
- Open Access
- 14 October 2023
- Published by Walter de Gruyter GmbH in Romanian Journal of Rhinology
- Vol. 13 (52) , 201-228
Abstracts of the 7 Congress of the Romanian Rhinologic Society
- 14 October 2023
- Published by Walter de Gruyter GmbH in Romanian Journal of Rhinology
- Vol. 13 (52) , 201-228
Open AccessAbstracts of the 7 Congress of the Romanian Rhinologic Society
- Open Access
- 4 September 2022
- Published by MDPI AG in International Journal of Molecular Sciences
- Vol. 23 (17) , 10133
Reactive Oxygen Species and Long Non-Coding RNAs, an Unexpected Crossroad in Cancer Cells
Long non-coding RNAs (lncRNA) have recently been identified as key regulators of oxidative stress in several malignancies. The level of reactive oxygen species (ROS) must be constantly regulated to maintain cancer cell proliferation and chemoresistance and to prevent apoptosis. This review will discuss how lncRNAs alter the ROS level in cancer cells. We will first describe the role of lncRNAs in the nuclear factor like 2 (Nrf-2) coordinated antioxidant response of cancer cells. Secondly, we show how lncRNAs can promote the Warburg effect in cancer cells, thus shifting the cancer cell’s “building blocks” towards molecules important in oxidative stress regulation. Lastly, we explain the role that lncRNAs play in ROS-induced cancer cell apoptosis and proliferation.
- 4 September 2022
- Published by MDPI AG in International Journal of Molecular Sciences
- Vol. 23 (17) , 10133
Open AccessReactive Oxygen Species and Long Non-Coding RNAs, an Unexpected Crossroad in Cancer Cells
Long non-coding RNAs (lncRNA) have recently been identified as key regulators of oxidative stress in several malignancies. The level of reactive oxygen species (ROS) must be constantly regulated to maintain cancer cell proliferation and chemoresistance and to prevent apoptosis. This review will discuss how lncRNAs alter the ROS level in cancer cells. We will first describe the role of lncRNAs in the nuclear factor like 2 (Nrf-2) coordinated antioxidant response of cancer cells. Secondly, we show how lncRNAs can promote the Warburg effect in cancer cells, thus shifting the cancer cell’s “building blocks” towards molecules important in oxidative stress regulation. Lastly, we explain the role that lncRNAs play in ROS-induced cancer cell apoptosis and proliferation.