Risk factors affecting patients survival with colorectal cancer in Morocco: survival analysis using an interpretable machine learning approach.

The aim of our study was to assess the overall survival rates for colorectal cancer at 3 years and to identify associated strong prognostic factors among patients in Morocco through an interpretable machine learning approach. This approach is based on a fully non-parametric survival random forest (RSF), incorporating variable importance and partial dependence effects. The data was povided from a retrospective study of 343 patients diagnosed and followed at Hassan II University Hospital. Covariate selection was performed using the variable importance based on permutation and partial dependence plots were displayed to explore in depth the relationship between the estimated partial effect of a given predictor and survival rates. The predictive performance was measured by two metrics, the Concordance Index (C-index) and the Brier Score (BS). Overall survival rates at 1, 2 and 3 years were, respectively, 87% (SE = 0.02; CI-95% 0.84-0.91), 77% (SE = 0.02; CI-95% 0.73-0.82) and 60% (SE = 0.03; CI-95% 0.54-0.66). In the Cox model after adjustment for all covariates, sex, tumor differentiation had no significant effect on prognosis, but rather tumor site had a significant effect. The variable importance obtained from RSF strengthens that surgery, stage, insurance, residency, and age were the most important prognostic factors. The discriminative capacity of the Cox PH and RSF was, respectively, 0.771 and 0.798 for the C-index while the accuracy of the Cox PH and RSF was, respectively, 0.257 and 0.207 for the BS. This shows that RSF had both better discriminative capacity and predictive accuracy. Our results show that patients who are older than 70, living in rural areas, without health insurance, at a distant stage and who have not had surgery constitute a subgroup of patients with poor prognosis.

Risk factors affecting patients survival with colorectal cancer in Morocco : Survival Analysis using an Interpretable Machine Learning Approach.

The aim of our study was to assess the overall survival rates for colorectal patients in Morocco and to identify strong prognostic factors using a novel approach combining survival random forest and the Cox model. Covariate selection was performed using the variable importance based on permutation and partial dependence plots were displayed to explore in depth the relationship between the estimated partial effect of a given predictor and survival rates. The predictive performance was measured by two metrics, the Concordance Index (C-index) and the Brier Score (BS). Overall survival rates at 1, 2 and 3 years were, respectively, 87% (SE = 0.02; CI-95% = 0.84-0.91), 77% (SE = 0.02; CI-95% = 0.73-0.82) and 60% (SE = 0.03; CI-95% = 0.54-0.66). In the Cox model after adjustment for all covariates, sex, tumor differentiation had no significant effect on prognosis, but rather tumor site had a significant effect. The variable importance obtained from RSF strengthens that surgery, stage, insurance, residency, and age were the most important prognostic factors. The discriminative capacity of the Cox PH and RSF was, respectively, 0.771 and 0.798 for the C-index, while the accuracy of the Cox PH and RSF was, respectively, 0.257 and 0.207 for the Brier Score. This shows that RSF had both better discriminative capacity and predictive accuracy. Our results show that patients who are older than 70, living in rural areas, without health insurance, at a distant stage and who have not had surgery constitute a subgroup of patients with poor prognosis.

Cancer in Moroccan elderly: the first multicenter transverse study exploring the sociodemographic characteristics, clinical profile and quality of life of elderly Moroccan cancer patients.

BACKGROUND: Moroccan incidence of cancer is increasing with the lengthening of life expectancy. Data regarding elderly Moroccan cancer patients are lacking. In the context of our project aiming to develop an adapted version of the Comprehensive Geriatric Assessment CGA to the Moroccan population, we launched the first Moroccan multicenter transverse study to explore the characteristics of elderly Moroccan cancer patients. METHODS: The study was conducted in nine Moroccan medical oncology departments. Patients were enrolled over 4 months. Inclusion criteria were patients aged 65 years or over with verified solid cancer. The questionnaire included four sections: socio-demographic and economic data, clinical data, vulnerability and EORTC-QLQ C30. We explored the entire included population. Then, we compared the results according to age (65-70 years old and ≥ 71 years old) and sex. We also explored the correlation between G8 scores and the ability to practice religion as an indicator of fitness level. RESULTS: In total, 164 patients were enrolled. The mean age was 73.18 ± 6.01 years. The majority of patients were married, lived with their children and received their financial income from them. Fifteen percent of families asked to hide the diagnosis from the patient. Breast (23%), colorectal (15.9%) and lung (14%) cancers were the most frequent, and 83.5% had an abnormal G8. The majority of the patients were independent for basic daily activities. Female patients had poorer social and economic conditions. Abnormal G8 was correlated with religious practice and quality of life scores. CONCLUSION: This is the first multicenter prospective study designed to collect data on the lifestyle and clinical profiles of elderly Moroccan cancer patients as an Arab and Muslim population. Our study shows that it is a well-cared-for population with strong social ties. However, there is deep economic vulnerability, especially among women, requiring urgent care. Religious practice is an important daily activity for our elderly patients and should be included in the Moroccan CGA.

Implication of Microsatellite Instability Pathway in Outcome of Colon Cancer in Moroccan Population.

BACKGROUND: Tumors with microsatellite instability (MSI tumors) have distinct clinicopathological features. However, the relation between these tumor subtypes and survival in colon cancer remains controversial. The aim of this study was to evaluate the overall survival (OS) in patients with MSI phenotype, in FES population. METHODS: The expression of MMR proteins was evaluated by immunohistochemistry for 330 patients. BRAF, KRAS, and NRAS mutations were examined by Sanger sequencing and pyrosequencing methods. The association of MSI status with a patient's survival was assessed by the Kaplan-Meier method and log-rank test. RESULTS: The mean age was 54.6 years (range of 19-90 years). The MSI status was found in 11.2% of our population. MSI tumors were significantly associated with male gender, younger patients, stage I-II, right localization, and a lower rate of lymph node and distant metastasis. The OS tends to be longer in MSI tumors than MSS tumors (109.71 versus 74.08), with a difference close to significance (P = 0.05). CONCLUSION: Our study demonstrates that MSI tumors have a particular clinicopathological features. The results of survival analysis indicate that the MSI status was not predictive of improved overall survival in our context with a lower statistical significance (P = 0.05) after multivariate analysis.

[Outcome of locally advanced Darier and Ferrand dermatofibrosarcoma: about a case and literature review]. / Une réponse complète d'un dermatofibrosarcome de Darrier et Ferrand localement avancé: à propos d'un cas et revue de la littérature.

Darier and Ferrand dermatofibrosarcoma (DFS) is a rare skin tumor characterized by its local aggressiveness and a high risk of recurrences. Prognosis depends essentially on the quality of treatment. Complete response in Darier and Ferrand dermatofibrosarcoma with healthy margins, initially judged inoperable after 1 year of neoadjuvant imatinib-based treatment, has been rarely described in literature. We here report the case of a young female patient treated in the Department of Medical Oncology in FES for locally advanced DFS with complete response, in order to assess the role of imatinib and of targeted therapies in the treatment of DFS.

[Parotid metastasis from carcinoma of the breast: report of a case and review of the literature]. / Métastase parotidienne d'un cancer du sein: à propos d'un cas et revue de la littérature.

Parotid metastasis from carcinoma of the breast is very rare, only a few cases have been reported in the literature. We here report the case of a 43-year old patient treated for right breast cancer in whom left parotid metastasis (confirmed histologically) occurred two years after the end of the treatment.

[Paraneoplastic dermatomyositis revealing an undifferentiated nasopharyngeal carcinoma: about a case]. / La dermatomyosite paranéoplasique révélant un carcinome indifférencié du nasopharynx: à propos d'un cas.

Dermatomyositis (DM) is an inflammatory disease of unknown origin that manifests as a myopathy associated with typical skin lesions. Association between DM and cancer is frequent (from 18% to 32% according to case series). It was described for the first time by Stertz in 1916 in association with gastric cancer. All histological types and sites of cancer in the general population may be associated with DM. Its association with nasopharyngeal carcinoma (NPC) is rarely described and the incidence proportion is 1 case of nasopharyngeal carcinoma per 1.000 persons.

[Pleural epithelioid sarcoma: about a case and review of the literature]. / Sarcome épithélioide pleural, à propos d'un cas avec revue de la littérature.

Proximal epithelioid sarcoma (PES) originating from the pleura is a clinical entity rarely reported in the literature. We report the case of a young patient with immediately metastatic proximal epithelioid sarcoma (PES) treated at the Department of Medical Oncology, Fes. Treatment consisted of chemotherapy based on doxorubicin and ifosfamide. After the first cycle of chemotherapy, the disease led to a fatal outcome. Our case study highlights the potentially aggressive behaviour of PES which represents a clinical trap and can be life-threatening.

Non-HIV Kaposi's sarcoma: a review and therapeutic perspectives.

"Classic" Kaposi's sarcoma (CKS) not related to HIV is a multifocal angioproliferative neoplasm that is linked to human herpesvirus. CKS is a cutaneous cancer frequently occurring with an indolent course. However, it can compromise the quality of life by causing pain, disfigurement and functional disability. For this reason, the main treatment goals are not only to reduce the cutaneous lesions but also to alleviate organ involvement and psychological stress by delaying disease progression and ultimately cure. This report summarizes systemic treatment options of CKS, including chemotherapy, immunotherapy and anti-HHV8 therapy. In addition, this review will focus on the recent understanding of carcinogenesis and consequently highlight potential "targeted" therapeutic interventions.

Null phenotype non-Hodgkin lymphoma presenting as a large chest wall mass: case report.

Tumors of chest wall represent a variant entity. Most of them arise from metastasis of malignant tumors or from local invasion by contiguity. However, non-Hodgkin's lymphomas of the chest wall are extremely rare; only a few cases have been reported in the literature. We report a case about a Moroccan woman, with non-Hodgkin null phenotype lymphoma of the chest, treated successfully with CHOP (cyclophosphamide, Doxorubicin, Vincristin and prednisone) followed by local radiotherapy.