Publications by authors named "Yacoub A Yousef"

Background: To evaluate the clinical presentation, pathological features and outcomes of retinoblastoma based on the race of origin in a global cohort of patients.

Methods: Retrospective collaborative study of 1426 patients who underwent primary enucleation for retinoblastoma.

Results: Patients were grouped into Caucasians (n = 231, 16%), Asians (n = 841, 59%), Hispanics (n = 226, 16%), Arabs (n = 96, 7%) and Others (Africans, African Americans, Indigenous Australians; n = 32, 2%) cohorts.

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Article Synopsis
  • This study aims to examine the histopathology and outcomes in patients with retinoblastoma who underwent eye enucleation and had neovascular glaucoma (NVG).
  • The research included 1,420 total cases from five continents, revealing that 16% of patients with NVG were often at higher risk of severe histopathological findings.
  • The findings indicate that NVG is linked to more aggressive forms of the disease and a higher chance of metastasis, emphasizing the need for careful monitoring and treatment in these cases.
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Purpose: Retinoblastoma, a childhood cancer originating in the retina, is primarily attributed to pathogenic RB1 mutations The aim of this study is to conduct a mutational analysis of the RB1 gene in cases of unilateral Retinoblastoma among individuals within the Jordanian population.

Methods: In this study, the peripheral blood of 50 unilateral Rb patients was collected, genomic DNA was extracted, and mutations were identified using Next Generation Sequencing (NGS) analysis.

Results: In this cohort of 50 unrelated patients with unilateral Rb, the median age at diagnosis was eight months (mean, 12 months; range; 2 weeks to 54 months).

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  • The study aimed to analyze high-risk histopathological features in eyes with retinoblastoma (RB) after enucleation and compare patient outcomes globally.
  • A total of 1,426 RB cases were reviewed, revealing significant differences in histopathological features across continents, with Asia showing the highest rates of massive choroidal invasion and optic nerve invasion.
  • The findings indicated that patients from South America and Asia faced greater risks of tumor recurrence, systemic metastasis, and mortality compared to those from Australia, Europe, and North America.
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Color vision deficiency (CVD) is an often-overlooked issue within the medical community, and its consequences remain insufficiently explored. We aim to evaluate how CVD affects diagnostic accuracy and distinguish between malignant choroidal melanoma and benign choroidal nevus among ophthalmologists. In this cross-sectional study, we engaged ophthalmologists through a web-based survey distributed via the professional ophthalmology society's social media channels.

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Intraocular surgeries are conventionally contraindicated for patients with active retinoblastoma (Rb) due to the potential risk of tumor dissemination. However, surgery is occasionally necessary to preserve vision in patients with a single eye when the eye is complicated by rhegmatogenous retinal detachment (RRD). This study aims to evaluate the outcomes of surgical repair for RRD in pediatric patients with active Rb utilizing a non-drainage scleral buckling approach.

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Background: Breast cancer remains a leading cause of cancer-related mortality and morbidity worldwide. Ocular and periocular metastasis present as a rare but clinically significant manifestation. This study aims to explore demographics and clinical aspects of ocular and periocular metastasis in breast cancer patients.

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This study compares the outcomes of managing retinoblastoma between patients with unilateral and bilateral presentations. The study, conducted at the King Hussein Cancer Center in Amman, Jordan, retrospectively analyzed cases of retinoblastoma treated between March 2003 and December 2019. Evaluation criteria included clinical features, disease stage, treatment methods, and overall management outcomes.

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This epidemiological study examined ocular and orbital lymphomas in the United States from 1995 to 2018, using data from the North American Association of Central Cancer Registries database of 87,543 patients with ocular and adnexal malignancies. We identified 17,878 patients (20.4%) with ocular and orbital lymphomas, with an age-standardized incidence rate (ASIR) of 2.

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Molecular biology studies of uveal melanoma have resulted in the development of novel immunotherapy approaches including tebentafusp-a T cell-redirecting bispecific fusion protein. More biomarkers are currently being studied. As a result, combined immunotherapy is being developed as well as immunotherapy with bifunctional checkpoint inhibitory T cell engagers and natural killer cells.

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Article Synopsis
  • The study investigates optic disc swelling in cancer patients at a tertiary center in Jordan, focusing on causes and outcomes from 2019 to 2020.
  • Among 58 patients, the majority were young females, with high intracranial pressure noted as the leading cause, often linked to CNS tumors.
  • Treatment included medications and surgeries, resulting in visual acuity improvement in 42% of affected eyes, despite a 19% mortality rate at a 12-month follow-up.
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Purpose: To describe the clinical presentation and treatment outcomes of children who received a diagnosis of retinoblastoma in 2017 throughout Asia.

Design: Multinational, prospective study including treatment-naïve patients in Asia who received a diagnosis of retinoblastoma in 2017 and were followed up thereafter.

Participants: A total of 2112 patients (2797 eyes) from 96 retinoblastoma treatment centers in 33 Asian countries.

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Purpose: To analyze causes and prognostic factors for death among Retinoblastoma (Rb) patients treated at a single specialized tertiary cancer center in Jordan.

Methods: We reviewed the mortality causes for all Rb patients who have been treated at the King Hussein Cancer Center between 2003 and 2019 and were followed for at least 3 years after diagnosis. The main outcome measures included demographics, laterality, tumor stage, treatment modalities, metastasis, survival, and causes of death.

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Background: Color vision deficiency (CVD) is an under-reported problem among medical personnel, and its impact is still not well characterized. We aim to assess the impact of CVD among ophthalmologists on the accuracy of diagnosing different benign and malignant choroidal lesions.

Methods: This is a cross-sectional study conducted on ophthalmologists.

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Aim: To compare the risk and pattern of High-Risk Pathologic Features (HRPF) in retinoblastoma between primary and secondary enucleation.

Methods: A retrospective analysis of 121 eyes from 118 patients who underwent enucleation at the King Hussein Cancer Center (KHCC) Amman, Jordan, between November 2009 and January 2020. Demographic information, tumor stage, time from diagnosis-to-enucleation, results of pathology, metastasis, and mortality were retrieved.

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Purpose: The humanitarian crisis in Syria has had a profound impact on the entire region. In this study, we report the patterns of presentation and management outcomes of Syrian patients with Retinoblastoma (Rb) treated at a single tertiary cancer center in Jordan.

Methods And Materials: This is a retrospective comparative study of Syrian refugees and Jordanian citizens who had Rb between 2011 and 2020.

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We report an unusual case of metastatic esophageal carcinoma to the vitreous associated with focal retinitis in a 44-year-old male. A 44-year-old male patient, known case of locally advanced esophageal carcinoma, presented with a 3-day history of left eye floaters. The initial diagnosis was inflammatory vitreo-retinitis that responded to systemic steroids.

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Background: High frequency ultrasonography (ultrasound biomicroscopy; UBM) is an ophthalmic diagnostic tool that can be used to measure the depth of the anterior segment (ASD), the anterior chamber angle (ACA), as well as thicknesses of the iris and the ciliary body (CB).

Methods: The anterior segment dimensions and thicknesses were measured by Sonomed 35-MHz.

Results: Measurements for 95 eyes from 52 adults were analyzed.

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Purpose: We present an epidemiologic analysis of retinoblastoma (RB) and uveal melanoma (UM) in Jordan to aid national strategies for improved ocular cancer surveillance and control.

Methods: A retrospective cohort of all Jordanian patients with RB and UM diagnosed over 10 years (2011-2020). Outcome measures included incidence, demographics, and outcomes.

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Uveal melanoma is the most common primary intraocular malignancy in adults, characterized by an insidious onset and poor prognosis strongly associated with tumor size and the presence of distant metastases, most commonly in the liver. Contrary to most tumor identification, a biopsy followed by a pathological exam is used only in certain cases. Therefore, an early and noninvasive diagnosis is essential to enhance patients' chances for early treatment.

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Background: Eye salvage and survival for patients with retinoblastoma (RB) can be improved by enhancement of early diagnosis. This study aims to investigate the impact of modifying the teaching curriculum for medical students about awareness of this condition.

Methods: Medical students completed a questionnaire about RB, preluded by a photograph of a child with leukocoria.

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Article Synopsis
  • The study aims to assess how presenting features, tumor size, and treatment methods impact the risk of metastatic death in patients with advanced intraocular retinoblastoma (RB) based on a large international data set.
  • A total of 1,841 patients were evaluated, categorized according to AJCC standards for tumor size, with treatment options including enucleation and various chemotherapy approaches leading to different survival outcomes.
  • Results showed a significant correlation between tumor category and mortality risk, with higher risks linked to larger tumor stages (cT3) and specific complications, while primary enucleation yielded the best survival rates compared to other treatment modalities.
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Purpose: To determine the value of clinical features for advanced intraocular retinoblastoma as defined by the eighth edition of the American Joint Committee on Cancer (AJCC) cT3 category and AJCC Ophthalmic Oncology Task Force (OOTF) Size Groups to predict the high-risk pathologic features.

Design: International, multicenter, registry-based retrospective case series.

Participants: Eighteen ophthalmic oncology centers from 13 countries over 6 continents shared evaluations of 942 eyes enucleated as primary treatment for AJCC cT3 and, for comparison, cT2 retinoblastoma.

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The 8 edition of the American Joint Committee on Cancer (AJCC) staging manual incorporated new changes from its 7 edition for classifying retinoblastoma (RB). We assessed the comparative prognostic values of the 7 and 8 editions of the AJCC clinical (cTNM) staging manuals for RB and suggested modifications for future edition accordingly. A retrospective, observational study.

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Purpose: Ciliary body (CB) and iris thicknesses may change with certain eye diseases as well as between different populations. Here, we report Ultrasound Biomicroscopy Measurements (UBM) of the normal thickness for the CB and the iris from a homogenous population in the Middle East.

Patients And Methods: Sonomed 35-MHz (SONOMED, INC.

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