WITHDRAWN: Molecular classification of colorectal cancer: Current perspectives and controversies.

This article has been withdrawn at the request of the editor. The authors have plagiarized part of a paper that had already appeared in ASCO EDUCATIONAL BOOK (2014), 91-99 (http://meetinglibrary.asco.org/content/114000091-144). One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents an abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy. This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

Urinary Bladder Cancer: Biomarkers and Target Therapy, New Era for More Attention.

Currently, bladder cancer (BCa) evaluation depends mainly on traditional clinicopathological parameters encompassing tumor stage and grade, which will not reflect the behavior of the disease. Diverse molecular alterations are responsible for the heterogeneous course. The differences in molecular pathogenesis between non-invasive BCa and invasive BCa have been recognized. Molecular biomarkers are promising to predict progression and survival. The management of advanced BCa remains somewhat primitive in comparison with other more common malignancies. This topic will discuss the molecular pathways, biomarkers and potential targets that may improve the outcome in BCa.

Pattern of Venous Thrombosis in Cancer Patients: Frequency and Survival Effect; Single Center Experience.

Venous thromboembolism (VTE) represents one of the most important causes of morbidity and mortality in cancer patients. This investigation was undertaken to investigate the natural history of VTE in the oncology center in a tertiary care hospital. We did a retrospective study on cancer patients who presented to King Abdullah Medical city in Holly capital; a tertiary care hospital; from May 2011 to June 2013. Follow up period was calculated from time of VTE diagnosis till the last clinical visit or till patient death. Among 1,678 cancer patients, 132 (7.87 %) were diagnosed with VTE. The median patient age was 53.5 years, with female to male ratio 1.3/1. Thirty one patients (23.5 %) were diagnosed with VTE and cancer simultaneously, seventy four patients (56.1 %) were on chemotherapy and twenty eight patients (21.2 %) were on best supportive care.VTE were symptomatic in 110 patients (83.3 %) and asymptomatic in 22 patients (16.7 %). Lower limbs were the commonest site (42.4 %) with the highest incidence in patients with advanced stages (93 %). Forty nine (37 %) patients were receiving LMWH as prophylaxis. Median survival in months for patients with VTE prophylaxis versus without prophylactic, and asymptomatic versus symptomatic were (12.6 vs 6.3; p 0.12 and 9.8 vs 12.4; p 0.885, respectively). There is underutilization of thromboprophylaxis in our region, which needs more effort to reduce VTE burden. Also we need large prospective studies to clarify the impact of VTE symptoms and presentation on patient's survival.

Impact of body mass index on clinico-pathological parameters and outcome in patients with metastatic prostate cancer.

BACKGROUND: This study evaluates the correlation between body mass index (BMI) and clinicopathological parameters of metastatic prostate cancer (MPC) and its impact on survival. METHOD: During the study period, 71 MPC patients were eligible. Patients with BMI<25.0kg/m(2) were categorized as level I and patients with BMI⩾25.0kg/m(2) were categorized as level II. Demographic features and survival rates were evaluated by the Kaplan-Meier method and Cox proportional models. RESULTS: 31 patients belonged to level I while the rest belonged to level II with insignificant higher median follow-up duration in level II; p=0.5. In terms of age, metastasis, serum level of albumin, prostatic specific antigen, alkaline phosphatase (AKP) and Gleason score, there was no significant difference between the two levels. The cumulative survival probability in the 12th, 24th and 36th month in level I vs; level II was; 86.7%, 68.7%, 64.1% vs; 74.4%, 67.7%, 55.1%, respectively with 7 patients dead in level I compared to 14 patients dead in level II denoting a higher PC-specific death rate in the level II group. In univariate and multivariate analysis, poor prognosis was associated with increasing AKP (HR=1.0005, 95% CI, p=0.03; HR=1.001, 95% CI, p=0.03) respectively, while better prognosis was associated with no visceral metastasis (HR=0.09, 95% CI, p=0.000; HR=0.04, 95% CI, p=0.000) and increasing albumin levels (HR=0.17, 95% CI, p=0.000; HR=0.15, 95% CI, p=0.000) respectively. In multivariate analysis only, patients belonging to level I were associated with better prognosis (HR=0.17, 95% CI, p=0.02). CONCLUSION: BMI is dependent on prognostic factors in patients with MPC.

End-of-life palliative chemotherapy: where do we stand?

BACKGROUND: This study evaluates the use of palliative chemotherapy (PCT) and possible associated factors at the end of life. METHOD: The study includes all advanced non hematological cancer patients who died in the King Abdullah Medical City during the period from January 2011 to April 2014. Demographic and disease features were registered. RESULTS: 420 patients were included in the study, median age 62 years (range 17-108); 52% female and 48% male. 87.4% of patients were Saudis and 12.6% non Saudis. 124 (29.5%) patients received PCT at the last month before death (LM-PCT): 21.8%, 22.6% and 55.6% within one, two and four weeks of death, respectively. Place of death (critical care vs. regular ward) and mode of admission (ER vs. OPD vs. Transferred) had a strong association with LM-PCT (p<0.0001, ϕ=0.35) and (p<0.0001, V=0.43), respectively. There was a gradual increase in the number of patients receiving LM-PCT from January 2011 to April 2014; 15.3%, 28.2%, 37.1% and 19.4%, respectively. CONCLUSION: In our center; at the end of life, there is a gradual increase in the number of patients receiving chemotherapy which significantly increased cancer patients' odds without clear predictive factors associated with its use, which calls into question the benefits of PCT in terminally ill cancer patients.

Target therapy in metastatic pheochromocytoma: current perspectives and controversies.

Most of the pheochromocytomas (PCCs) are benign neoplasms, but when they are malignant, they can be difficult to treat. Despite advances in diagnosis and imaging, it remains an untreatable tumor, when metastases develop. A deeper understanding of the alteration of the specific molecular pathways causing malignant PCCs might hopefully lead in the future to the development of multiple molecular-targeted therapies to treat it successfully. Clinical experience and the use of murine models of metastatic PCCs have helped introduce new experimental treatment options which will significantly help the PCCs community explore novel targeted therapies that have already shown promising results in many other types of tumors.