Issa Mohamad

Dr. Issa Mohamad

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

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

Representative Publications

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1 December 2021 in European Journal of Cancer
Verified
Journal Article
Closed access
PBPaolo Bossi
Paolo Bossi
ATAnnalisa Trama
Annalisa Trama
ABAlice Bernasconi
Alice Bernasconi
SGSalvatore Grisanti
Salvatore Grisanti
IMIssa Mohamad
Issa Mohamad
AFAlessandra Franzetti-Pellanda
Alessandra Franzetti-Pellanda

15 August 2023 in Cancers
Verified
Journal Article
Open access
PDF file
Akram Al-IbraheemAkram Al-Ibraheem
Akram Al-Ibraheem
UAUla Al-Rasheed
Ula Al-Rasheed
NMNoor Mashhadani
Noor Mashhadani
Ahmed Saad AbdlkadirAhmed Saad Abdlkadir
Ahmed Saad Abdlkadir
DADhuha Ali Al-Adhami
Dhuha Ali Al-Adhami
Hikmat Abdel-RazeqHikmat Abdel-Razeq
Hikmat Abdel-Razeq
DTC accounts for the majority of endocrine tumors. While the incidence of thyroid cancer has been increasing globally over the past few decades, papillary thyroid carcinoma (PTC) generally shows an excellent prognosis, except in cases with aggressive clinicopathological features. This study aimed to assess the 5- and 10-year overall survival (OS) and progression-free survival (PFS) of 528 Arabic patients diagnosed with primary DTC from 1998 to 2021. Additionally, the study aimed to analyze the impact of various factors on both OS and PFS. An univariable survival analysis was conducted using Kaplan–Meier curves. The 5- and 10-year OS for patients with DTC have exceeded 95%. Additionally, PFS showed very good rates (ranging between 96.5 and 85% at 5 and 10 years, respectively). Age, male gender, risk of recurrence, and distant metastasis were identified as the main negative prognostic factors for both OS and PFS, while RAI treatment was found to be a significant factor in improving OS. Moreover, adherence to the King Hussein Cancer Center’s (KHCC) CPG demonstrated significant improvement in PFS. These findings highlight common prognostic factors and favorable outcomes in Arabic patients with DTC treated at a tertiary cancer center using standard of care approaches.

Verified
Journal Article
Open access
PDF file
Akram Al-IbraheemAkram Al-Ibraheem
Akram Al-Ibraheem
Ahmed Saad AbdlkadirAhmed Saad Abdlkadir
Ahmed Saad Abdlkadir
DADhuha Al-Adhami
Dhuha Al-Adhami
THTaher Abu Hejleh
Taher Abu Hejleh
AMAsem Mansour
Asem Mansour
OAOmar Talab Alsaraireh
Omar Talab Alsaraireh
This study aims to determine the diagnostic accuracy of staging PET/CT and neck MRI in patients with laryngeal carcinoma and to assess the value of PET/CT in predicting progression-free survival (PFS) and overall survival (OS). Sixty-eight patients who had both modalities performed before treatment between 2014 and 2021 were included in this study. The sensitivity and specificity of PET/CT and MRI were evaluated. PET/CT had 93.8% sensitivity, 58.3% specificity, and 75% accuracy for nodal metastasis, whereas MRI had 68.8%, 61.1%, and 64.7% accuracy, respectively. At a median follow-up of 51 months, 23 patients had developed disease progression and 17 patients had died. Univariate-survival analysis revealed all utilized PET parameters as significant prognostic factors for OS and PFS (p-value < 0.03 each). In multivariate analysis, metabolic-tumor volume (MTV) and total lesion glycolysis (TLG) predicted better PFS (p-value < 0.05 each). In conclusion, PET/CT improves the accuracy of nodal staging in laryngeal carcinoma over neck MRI and adds to the prognostication of survival outcomes through the use of several PET metrics.

19 January 2025 in Diagnostics
Verified
Journal Article
Open access
PDF file
Akram Al-IbraheemAkram Al-Ibraheem
Akram Al-Ibraheem
Ahmed Saad AbdlkadirAhmed Saad Abdlkadir
Ahmed Saad Abdlkadir
UAUla Al-Rasheed
Ula Al-Rasheed
DADhuha Al-Adhami
Dhuha Al-Adhami
FIFeras Istatieh
Feras Istatieh
AMAsem Mansour
Asem Mansour
Background/Objectives: Over the past four years, 68Ga-fibroblast activation protein inhibitor (FAPI) positron emission tomography/computed tomography (PET/CT) has been established at a tertiary cancer care facility in Jordan. This retrospective study aims to explore tracer uptake metrics across various epithelial neoplasms, identify diagnostic pitfalls associated with 68Ga-FAPI PET/CT, and evaluate the influence of 68Ga-FAPI PET/CT staging results on changes in therapeutic intent compared to gold standard molecular imaging modalities. Methods: A total of 48 patients with biopsy-confirmed solid tumors underwent 77 68Ga-FAPI PET/CT examinations for molecular imaging assessment, encompassing neoplasms originating from the gastrointestinal tract, head and neck, hepatobiliary system, pancreas, breast, and lung. Results: Notably, pancreaticobiliary tumors exhibited the highest tracer uptake, with mean maximum standardized uptake values (SUVmax) and tumor-to-background ratios (TBR) surpassing 10. A comparative sub-analysis of 68Ga-FAPI PET metrics in 20 treatment-naïve patients revealed a significant correlation between 68Ga-FAPI uptake metrics and tumor grade (Spearman’s rho 0.83; p = 0.00001). Importantly, the results from 68Ga-FAPI PET/CT influenced treatment decisions in 35.5% of the cases, primarily resulting in an escalation of management plans. A total of 220 diagnostic challenges were identified across 88.3% of the scans, predominantly within the musculoskeletal system, attributed to degenerative changes (99 observations). Conclusions: This comprehensive analysis highlights the potential significance of 68Ga-FAPI PET/CT in oncological imaging and treatment strategy, while also emphasizing the necessity for meticulous interpretation to mitigate diagnostic challenges.

16 October 2023 in Cancers
Verified
Journal Article
Open access
PDF file
IMIssa Mohamad
Issa Mohamad
IKIrene Karam
Irene Karam
AEAhmed Elsehemy
Ahmed Elsehemy
IAIbrahim Abu-Gheida
Ibrahim Abu-Gheida
Akram Al-IbraheemAkram Al-Ibraheem
Akram Al-Ibraheem
AHAli Hosni
Ali Hosni
Stereotactic body radiation therapy (SBRT) is a precise and conformal radiation therapy (RT) that aims to deliver a high dose of radiation to the tumor whilst sparing surrounding normal tissue, making it an attractive option for head and neck cancer (HNC) patients who are not suitable for the traditional long course of RT with comprehensive RT target volume. Definitive SBRT for HNC has been investigated in different settings, including early stage glottis cancer, and as an alternative to brachytherapy boost after external beam RT. It is also used as a primary treatment option for elderly or medically unfit patients. More recently, an SBRT combination with immunotherapy in the neoadjuvant setting for HNC showed promising results. Salvage or adjuvant SBRT for HNC can be used in appropriately selected cases. Future studies are warranted to determine the optimum dose and fractionation schedules in any of these indications.

19 October 2023 in Cancer Imaging
Verified
Journal Article
Open access
PDF file
IMIssa Mohamad
Issa Mohamad
THTaher Abu Hejleh
Taher Abu Hejleh
MQMonther Qandeel
Monther Qandeel
MAMaysa Al-Hussaini
Maysa Al-Hussaini
SKSami Koro
Sami Koro
AHAli Hosni
Ali Hosni
Background: Accuracy of head and neck MRI (HN-MRI) in predicting tumor invasion of laryngeal site/subsites in patients with laryngeal cancer prior to laryngectomy is poorly evaluated in the literature. Therefore, we aim to evaluate the diagnostic value of HN-MRI in accurate pre-operative estimation of tumor invasion to laryngeal subsites in patients with laryngeal cancer. Methods: Patients with laryngeal cancer who underwent HN-MRI for cancer staging and underwent total laryngectomy between 2008 and 2021 were included. Sensitivity, specificity, positive predictive value, negative predictive value, and overall accuracy of HN-MRI in predicting tumor invasion of laryngeal subsites were calculated based on concordance between the HN-MRI and histopathological results. Results: One hundred and thirty-seven patients underwent total laryngectomy [primary: 82/137(60%), salvage 55/137(40%)]. The utilization of HN-MRI resulted in the downstaging of 16/137 (11.6%) patients and the upstaging of 8/137 (5.8%) patients. For the whole cohort, there was a significant discordance between HN-MRI and histopathology for T-category; out of 116 cT4a disease, 102(87.9%) were confirmed to have pT4a disease, and out of 17 cT3 disease, 9(52.9%) were confirmed to have pT3 disease, p < 0.001. The MRI overall diagnostic accuracy of predicting tumor invasion was 91%, 92%, 82%, 87%, 72%, 76%, 65% and 68% for base of tongue, arytenoid, vocal cord, posterior commissure, pre-epiglottic space, cricoid cartilage, inner thyroid cortex, and subglottis, respectively. Conclusions: In patients with laryngeal cancer undergoing total laryngectomy, HN-MRI demonstrates promising accuracy in predicting tumor invasion of specific laryngeal subsites (e.g., base of tongue). Our findings showed the potential of HN-MRI as a valuable tool for pre-operative planning and treatment decision-making in this patient population.