SAMI ALMALKI

Dr. SAMI ALMALKI

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

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

Representative Publications

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30 August 2024 in Surgical Neurology International
Verified
Journal Article
Open access
AAAbdulsalam Aleid
Abdulsalam Aleid
AAAbdulrahim Saleh Alrasheed
Abdulrahim Saleh Alrasheed
SASaud N. Aldanyowi
Saud N. Aldanyowi
SASAMI ALMALKI
SAMI ALMALKI
Background: Aggressive brain tumors like glioblastoma multiforme (GBM) pose a poor prognosis. While magnetic resonance imaging (MRI) is crucial for GBM management, distinguishing it from other lesions using conventional methods can be difficult. This study explores advanced MRI techniques better to understand GBM properties and their link to patient outcomes. Methods: We studied MRI scans of 157 GBM surgery patients from January 2020 to March 2024 to extract radiomic features and analyze the impact of fluid-attenuated inversion recovery (FLAIR) resection on survival using statistical methods, proportional hazards regression, and Kaplan–Meier survival analysis. Results: Predictive models achieved high accuracy (area under the curve of 0.902) for glioma-grade prediction. FLAIR abnormality resection significantly improved survival, while diffusion-weighted image best-depicted tumor infiltration. Glioblastoma infiltration was best seen with advanced MRI compared to metastasis. Glioblastomas showed distinct features, including irregular shape, margins, and enhancement compared to metastases, which were oval or round, with clear edges and even contrast, and extensive peritumoral changes. Conclusion: Advanced radiomic and machine learning analysis of MRI can provide noninvasive glioma grading and characterization of tumor properties with clinical relevance. Combining advanced neuroimaging with histopathology may better integrate oncology and radiology for optimized glioblastoma management. However, further studies are needed to validate these findings with larger datasets and assess additional MRI sequences and radiomic features.

30 October 2024 in Cancers
Verified
Journal Article
Open access
PDF file
AAAbdulrahim Saleh Alrasheed
Abdulrahim Saleh Alrasheed
AAAbdulsalam Aleid
Abdulsalam Aleid
RAReema Ahmed Alharbi
Reema Ahmed Alharbi
MAMostafa Habeeb Alhodibi
Mostafa Habeeb Alhodibi
AAAbdulmonem Ali Alhussain
Abdulmonem Ali Alhussain
SASAMI ALMALKI
SAMI ALMALKI
Background: Proton beam radiation therapy (PBRT) is an advanced cancer treatment modality that utilizes the distinctive physical properties of protons to precisely deliver radiation to tumor targets while sparing healthy tissue. This cannot be obtained with photon radiation. In this systematic review and meta-analysis, we aimed to comprehensively assess the risk of brainstem toxicity in pediatric brain tumor patients undergoing PBRT. Methods: With adherence to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a predetermined search strategy was used to identify eligible articles from PubMed, Web of Science, Scopus, and Cochrane Library through July 2024. Results: The current study included a total of 11 eligible articles. The pooled prevalence of patients who suffered from brainstem toxicity was 1.8% (95% CI: 1%, 2.6%). The pooled prevalences of patients with Grade 1 to Grade 5 brainstem toxicity were found to be 10.6% (95% CI: 8.8%, 30%), 1.5% (95% CI: 0.6%, 2.5%), 0.7% (95% CI: 0.3%, 1.1%), 0.4% (95% CI: 0.1%, 0.7%), and 0.4% (95% CI: 0.1%, 0.8%), respectively, with an overall pooled prevalence of 0.7% (95% CI: 0.4%, 1%). Conclusions: This study revealed a relatively low incidence of symptomatic brainstem toxicity and its related mortality in the pediatric population undergoing PBRT. However, further research is encouraged to study the broader effects of PBRT and to explore various factors that may influence the risk of brainstem toxicity in patients treated with PBRT.

24 January 2025 in Surgical Neurology International
Verified
Journal Article
Open access
AAAbdulrahim Saleh Alrasheed
Abdulrahim Saleh Alrasheed
AAAbdulsalam Aleid
Abdulsalam Aleid
RAReema Ahmed Alharbi
Reema Ahmed Alharbi
MAMaryam Ali Alamer
Maryam Ali Alamer
KAKawthar Abdullah Alomran
Kawthar Abdullah Alomran
SASAMI ALMALKI
SAMI ALMALKI
Background: Brain metastasis has a negative influence on the morbidity and mortality of cancer patients. Conventionally, whole-brain radiotherapy (WBRT) was favored as the standard treatment for brain metastases. However, it has been linked to a significant decline in neuro-cognitive function and poor quality of life. Stereotactic radiosurgery (SRS) has recently gained prominence as an alternative modality, considering that it provides targeted high-dose radiation while minimizing adverse effects. This study evaluates the efficacy and safety of SRS versus WBRT in patients with intracranial metastases. Methods: According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement, through July 2024, we searched PubMed, Scopus, and Web of Science for articles comparing WBRT and SRS in patients with intracranial metastases. Outcomes included local and distant recurrence, leptomeningeal disease (LMD), and survival. We also used a random-effect model to perform a meta-analysis. Results: The findings revealed no significant differences in local (risk ratio [RR] = 0.70, 95% confidence interval [CI] [0.46, 1.06]) or distant recurrence rates (RR = 0.83, 95% CI [0.54, 1.28], P = 0.41) between WBRT and SRS. However, SRS was associated with a greater risk of post-radiation LMD (hazard ratio [HR] = 3.09, 95% CI [1.47, 6.49], P = 0.003). Survival rates at 1 year (RR = 1.03, 95% CI [0.83, 1.29], P = 0.76) and 5 years (RR = 0.89, 95% CI [0.39, 2.04], P = 0.78) demonstrated no significant differences. Conclusion: SRS and WBRT exhibited similar recurrence rates and overall survival (OS) at 1 and 5 years, with WBRT being more effective in managing post-radiation LMD. SRS patients, on the other hand, had longer OS when measured in months.

20 June 2025 in Surgical Neurology International
Verified
Journal Article
Open access
AAAbdulsalam Aleid
Abdulsalam Aleid
AAAbdulmonem A. Alhussain
Abdulmonem A. Alhussain
AAAwn Abdulmohsen Alessa
Awn Abdulmohsen Alessa
IAIbrahim Alahmed
Ibrahim Alahmed
AAAbdulmajeed Abdulaziz Aljabr
Abdulmajeed Abdulaziz Aljabr
SASAMI ALMALKI
SAMI ALMALKI
Background: Cerebral venous thrombosis (CVT) is commonly associated with intracranial hypertension (IH), though its neuroimaging markers remain less well-defined. This study aims to systematically review and compare neuroimaging markers of IH in CVT and idiopathic IH (IIH) to better understand their diagnostic implications. Methods: A systematic review and meta-analysis were conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. From inception to 2024, we searched PubMed, Web of Science, and Scopus for observational studies and randomized controlled trials focusing on neuroimaging findings in primary IH (i.e., IIH) and IH secondary to CVT. Data were extracted on neuroimaging outcomes, including peri-optic cerebrospinal fluid (CSF) pressure, optic nerve head protrusion, and others. Results: Six studies met the eligibility criteria, comprising three cohort studies and three case-control studies, with a combined total of 301 patients. The results indicated that peri-optic CSF pressure (Odds ratio [OR]: 5.85, P = 0.0002), optic nerve head protrusion (OR: 4.1, P = 0.02), sclera flattening (OR: 2.2, P = 0.04), and empty sella (OR: 3.25, P = 0.03) were observed more frequently in patients with IIH than in those with CVT and IH. However, when comparing CVT with IH to controls, optic nerve tortuosity did not show a significant difference (OR: 2.20, P = 0.18). Increased ventricular volume (Mean difference: 1.76, P < 0.00001) and sclera flattening (OR: 6.68, P = 0.002) were more common in CVT with IH patients compared to the control group. Conclusion: Typical neuroimaging characteristics of IH (e.g., empty sella) are more frequently observed in idiopathic cases (i.e., IIH) than in secondary causes, such as IH resulting from CVT. These differences have the potential to enhance diagnostic precision and facilitate the development of improved imaging protocols.

25 April 2025 in Surgical Neurology International
Verified
Journal Article
Open access
AAAbdulsalam Aleid
Abdulsalam Aleid
SASaud N. Aldanyowi
Saud N. Aldanyowi
AAAyat Jassim Aleid
Ayat Jassim Aleid
KAKhaled Albazli
Khaled Albazli
GFGhadeer Mohammad Fatani
Ghadeer Mohammad Fatani
SASAMI ALMALKI
SAMI ALMALKI
Background: Chronic pain is a debilitating condition that affects about 3% of the population globally. Conventionally, pharmacologic approaches, psychotherapy, and surgery have been used in the management of chronic refractory pain. However, over the past decades, advances in neurotechnology have enabled modern novel techniques of neurostimulation, such as spinal cord stimulation (SCS) and dorsal root ganglion (DRG), to be used in the management of chronic neuropathic pain that does not respond to conventional management. This review, therefore, aims to establish the efficacy of these two novel technologies in the management of chronic neuropathic pain compared to conventional medical management (CMM) techniques. Methods: A systematic search was conducted on three electronic databases, PubMed, Science Direct, and CENTRAL, for all relevant articles to the study topic. After a detailed review by two independent reviewers, only the articles that met the inclusion criteria were included. The Review Manager 5.4 software was utilized to conduct a meta-analysis of the outcomes of pain reduction. Results: Our online search yielded 345 articles; however, only eight studies were included in the analysis according to our inclusion criteria. The results from our pooled analysis indicated that SCS and dorsal root stimulation both resulted in a significant reduction in the rating of chronic pain mean difference (MD) (−4.73; 95% confidence interval [CI] [−4.76, −4.71] P < 0.00001) and MD (−1.09; 95% CI [−1.29, −0.90] P < 0.00001), respectively. Similarly, for the studies that reported percentage change in pain rating, the pooled analysis showed that SCS resulted in a higher percentage reduction in pain rating compared to CMM MD (69.47; 95% CI [64.31, 74.64] P < 0.00001). Conclusion: Based on the results of our analysis, we conclude that advances in neurostimulation techniques, such as SCS and DRG stimulation, have resulted in better management of chronic neuropathic pain compared to conventional pain management techniques.

4 October 2024 in Surgical Neurology International
Verified
Journal Article
Open access
SASAMI ALMALKI
SAMI ALMALKI
AAAbdulelah Saleh Almousa
Abdulelah Saleh Almousa
RARawan Ahmed Alturki
Rawan Ahmed Alturki
GSGhadi Ali Shamakhi
Ghadi Ali Shamakhi
FAFatimah Ahmed Alghirash
Fatimah Ahmed Alghirash
TATurki Fahhad Almutairi
Turki Fahhad Almutairi
Background: Traumatic brain injury (TBI) is a common result of external physical forces that damage the brain, affecting over 50 million people annually, with a higher prevalence in males. Children aged 0–4 years are the most susceptible, particularly in low-and middle-income countries, where 90% of TBI-related deaths occur. TBI significantly affects children’s quality of life. This study aimed to estimate the incidence of pediatric TBI during working hours among parents and caregivers in Saudi Arabia. Methods: A questionnaire-based cross-sectional survey was conducted over 2 months, from July to August 2023. The survey data were electronically gathered using a questionnaire sent over social media channels. It includes working as a caregiver for children in Saudi Arabia. Results: Involving 395 respondents, the primary focus was on child head injuries occurring during the working hours of parents and caregivers. Most respondents were in the 36–45 age bracket, predominantly female (66.1%) and married (81.8%). The age of the child at the time of injury was significantly associated with head injuries during parents’ and caregivers’ working hours, with the highest incidence among children aged 7–14 years (83.1%). The severity of the injury, hospital admission, need for intensive care, and surgical intervention were significantly associated with child injuries during these hours. Conclusion: In this study, we found a significantly higher incidence of head injuries in children during the working hours of both parents and caregivers. Factors such as longer work hours, the presence of a nanny, more children, male gender, and older child age were associated with this risk.