Mazyar Zahir

Dr. Mazyar Zahir

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 July 2023
Verified
Journal Article
Closed access
MZMazyar Zahir
Mazyar Zahir
MSMohammad Samzadeh
Mohammad Samzadeh
APAmirhossein Poopak
Amirhossein Poopak
AKAli Reza Khoshdel
Ali Reza Khoshdel
AAArash Armin
Arash Armin
Purpose: To compare the efficacy and adverse events of sildenafil monotherapy for benign prostatic hyperplasia (BPH) with its FDA-approved counterpart, tadalafil.Materials and Methods: In this single-arm self-controlled clinical trial, 33 patients were enrolled. All patients underwent a 6-week treatment with sildenafil, followed by a 4-week washout period and finally a 6-week treatment with tadalafil. Patients were examined on each appointment and post-void residual (PVR) urine, International Prostate Symptom Score (IPSS) and Quality of life index (IPSS-QoL index) were recorded subsequently. Efficacy of each drug regimen was then evaluated by comparing these outcome parameters.Results: Both sildenafil and tadalafil were shown to improve PVR (both p < .001), IPSS (both p < .001) and IP-SS-QoL index (both p < .001) significantly. Sildenafil was more effective than tadalafil in reducing PVR (mean difference (95%CI) = 9.91% (4.11, 15.72), p < .001) and ameliorating IPSS-QoL index (mean difference (95%CI) = 19.3% (4.47, 34.41), p = .027). Moreover, although not significant, sildenafil reduced IPSS more than tadalafil (mean difference (95%CI) = 3.33% (-0.22, 6.87), p = .065). Concurrent erectile dysfunction did not affect respon-siveness to therapy with either sildenafil or tadalafil but age was inversely related to post-treatment IPSS in both sildenafil (B = 0.21 (0.04, 0.37), p = .015) and tadalafil (B = 0.14 (0.02, 0.26), p = .021) regimens with a more prominent role in responsiveness to sildenafil (& beta; = 0.31) compared to tadalafil (& beta; = 0.19).Conclusion: Considering the significantly better improvement of PVR and IPSS-Qol index with sildenafil, this drug can be nominated as a suitable alternative for tadalafil as a BPH treatment, especially in younger patients who don't have any contraindications.

7 November 2023 in Urologia Journal
Verified
Journal Article
Closed access
ABAbbas Basiri
Abbas Basiri
MZMazyar Zahir
Mazyar Zahir
MSMohammad Soleimani
Mohammad Soleimani
AKAli Reza Khoshdel
Ali Reza Khoshdel
ATAli Tabibi
Ali Tabibi
SSShahrokh F Shariat
Shahrokh F Shariat
Objectives: To compare health-related quality of life (HRQOL), cost-effectiveness, and survival among different types of urinary diversion (UD) utilized after radical cystectomy (RC) for bladder cancer with consideration of the unique economic and cultural context in Iran. Patients and methods: In this retrospective study, we examined all patients who underwent RC from May 2017 to December 2021 at two specialized centers by the same surgical team. Patients were grouped based on their UD. Post-surgical HRQOL (obtained from EORTC QLQ-C30 and QLQBLM-30), financial burden, surgical complications, and survival were compared. Kruskal-Wallis H test, One-way ANOVA, and Kaplan-Meier analyses were utilized; accordingly. Results and limitations: In total 187 patients were identified—orthotopic neobladder (ONB) ( N = 75), ileal conduit (IC) ( N = 57), and cutaneous ureterostomy (CU) ( N = 55)—and were followed for a median 17.5 (Interquartile range: 7.0, 47.0) months. ONB was associated with better HRQOL, especially in the domains addressing physical, role and social functioning ( p = 0.003, 0.011, 0.045) as well as better body image ( p < 0.001), lower short- and long-term financial burden ( p = 0.034 and <0.001, respectively), marginally lower complication rate ( p = 0.049), and better 5-year overall survival ( p < 0.001), in comparison with other UDs. Patients who underwent CU had the lowest HRQOL and worst survival. Limitations were retrospective design and possibility of selection bias. Conclusions: In this first study that assesses a Middle Eastern collective; ONB seems to be the UD of choice with regard to HRQOL and economic burden when there is no contraindication.

18 April 2023 in Annals of Medicine & Surgery
Verified
Journal Article
Open access
MZMazyar Zahir
Mazyar Zahir
AAArash Alidousti
Arash Alidousti
Abdol-Mohammad KajbafzadehAbdol-Mohammad Kajbafzadeh
Abdol-Mohammad Kajbafzadeh
HAHamid Arshadi
Hamid Arshadi
FKFarzad Kompani
Farzad Kompani
Pooya HekmatiPooya Hekmati
Pooya Hekmati
Background: Wilms tumor (WT) is among the most common pediatric malignancies. In this study, the authors tried to evaluate the adherence to internationally-approved WT treatment protocols in our tertiary medical center in Iran. Methods: In this retrospective study, the medical records of 72 pathologically confirmed WT patients who underwent treatment from April 2014 to February 2020 were evaluated. Demographic characteristics, histologic features of the tumors and metastases, utilized treatments, and survival rates were subsequently investigated. Results: From the total of 72 patients, 31 (43.1%) and 41 (56.9%) were males and females, respectively. The median age at the time of diagnosis was 44.0 (interquartile range: 18.5, 72.0) months. Among the patients, favorable histology was observed in 68 (94.6%) patients, while 4 (5.4%) patients had unfavorable histology. Regarding chemotherapy, 34/56 (60.7%), 4/56 (7.1%), and 18/56 (32.2%) received adjuvant, neoadjuvant, and combined chemotherapy, respectively. The mean numbers of neoadjuvant and adjuvant chemotherapy sessions were 9.4±5.6 and 14.5±11.1, respectively. 32/72 (44.4%) of the patients received adjuvant radiotherapy with a mean number of 7.3±3.6 sessions. Overall survival rates were 86% at 1-year, 74% at 3-year, and 62% at 5-year. Conclusion: Our results suggested that while the demographic characteristics of WT patients in Iran resemble those in other countries, abidance to internationally recommended protocols is relatively low. Moreover, survival rates were rather dismal in our study compared to those from other developing countries, further signifying the need for the development of a nation-specific treatment protocol for WT.

1 January 2024 in Urology Research and Practice
Verified
Journal Article
Open access
ABAbbas Basiri
Abbas Basiri
AKAmir Hossein Kashi
Amir Hossein Kashi
MZMazyar Zahir
Mazyar Zahir
HOHossein Salehi Omran
Hossein Salehi Omran
NBNasrin Borumandnia
Nasrin Borumandnia
SHSakineh Hajebrahimi
Sakineh Hajebrahimi
Objective: This study aimed to evaluate the potential risk factors of lifetime urolithiasis occurrence on a nationwide scale in Iran. Methods: All data regarding urinary stone events were extracted from the cross-sectional Iran National Stone Survey (INSS) study, and the possible determinants of urolithiasis incidence were evaluated. Results: Our multivariable logistic regression suggested that while older age at presentation, male sex, and a positive family history of urolithiasis in either of the patient’s parents or siblings were all significantly associated with an increased odds of lifetime urolithiasis occurrence (all P < .001), a positive family history in one’s sister (odds ratio; OR=5.56) or brother (OR=4.70) were the most significant predictors. Moreover, belonging to Baluch ethnicity (i.e., an ethnical group indigenous to the south eastern regions of Iran) and residing in regions with higher water hardness (i.e., total concentration of dissolved minerals) were also associated with an increased odds of urolithiasis occurrence (P < .001 and P=.023, respectively). Conversely, living in regions with higher mean humidity decreased the chances of developing a urinary stone event during one’s lifetime (OR=0.62, P < .001). Conclusion: Our results indicated that a constellation of demographic, ecological, and familial risk factors are associated with an elevated risk of developing urinary stones during one’s lifetime. These findings can assist in implementing novel regional healthcare policies, considering the specific demographic and ecological characteristics. They also support tailoring personalized preventive strategies, particularly for individuals with multiple nonmodifiable risk factors. Cite this article as: Basiri A, Hossein Kashi A, Zahir M, et al. Exploring the impact of family history, demographics and ecological factors on urolithiasis prevalence: Insights from a nationwide study. Urol Res Pract. 2024;50(2):115-120.

26 March 2024 in Journal of Pediatric Urology
Verified
Journal Article
Closed access
MZMazyar Zahir
Mazyar Zahir
LSLida Sharifi-Rad
Lida Sharifi-Rad
SSSanam Ladi Seyedian
Sanam Ladi Seyedian
Abdol-Mohammad KajbafzadehAbdol-Mohammad Kajbafzadeh
Abdol-Mohammad Kajbafzadeh

21 February 2025 in Cancers
Verified
Journal Article
Open access
PDF file
CDChirag Doshi
Chirag Doshi
MZMazyar Zahir
Mazyar Zahir
ADAnosh Dadabhoy
Anosh Dadabhoy
DEDomenique Escobar
Domenique Escobar
LXLeilei Xia
Leilei Xia
SDSiamak Daneshmand
Siamak Daneshmand
In recent decades, serum tumor markers (STMs) have emerged as valuable adjuncts in early cancer detection and post-treatment surveillance. STMs are inexpensive, minimally invasive, and readily accessible tools that can be used to diagnose cancers, monitor patients’ responses to treatment, and even detect recurrence without imposing additional burdens on patients. Emerging evidence has demonstrated the reliability of STMs in the prognostication of bladder cancer (BC). However, their potential role extends beyond prognostication. This review intends to provide a multidimensional picture of STM applications in muscle-invasive bladder cancer (MIBC). In addition, we supplement this review with real-life clinical experiences from our institution to further illustrate the clinical feasibility of STMs in MIBC.