Effect of long-term proton pump inhibitors on phosphocalcium metabolism and bone mineral density.

Aim: Although Proton pump inhibitors (PPIs) are well-tolerated, their long-term use may be associated with decreased bone mass. Methods: This is a case-control study including patients treated with PPIs (>1 year) and control subjects who have not received PPIs treatment. Results: A total of 90 patients and 90 matched controls were included. PPIs use was associated with hypocalcemia and hypomagnesemia. Vitamin D3 deficiency and hyperparathyroidism were associated with PPIs use. Long-term PPIs use was significantly associated with decreased bone density. Risk factors of decreased bone mineral density (BMD) included age >50 years, menopause, lack of sun exposure, double PPIs dose, daily intake, post-meal intake and association with a mucoprotective agent. Conclusion: Our results highlight the risk of decreased BMD in patients on long-term PPIs treatment.

In this study, we investigated the impact of long-term use of proton pump inhibitors (PPIs) on bone health. Examining 90 patients on PPIs for over a year and matching them with control subjects, we found that PPIs were linked to lower bone density. Factors such as age over 50. menopause, limited sun exposure, higher PPIs dosage, daily intake, post-meal usage and combining PPIs with a mucoprotective agent were associated with decreased bone mineral density. Our findings emphasize the concern of reduced bone density in individuals undergoing prolonged PPIs treatment.

Bladder metastasis originating from gastric signet-ring cell carcinoma: a case report.

Bladder metastasis of gastric adenocarcinoma is a rare phenomenon. Hereby, we report a case of a 52-year-old patient who presented with upper gastro-intestinal bleeding and ascites and was diagnosed with gastric signet-ring cell carcinoma. A CT scan revealed peritoneal infiltration and anterior parietal thickening of bladder wall. Cystoscopy showed three budding lesions of the anterior wall of the bladder. He had an endoscopic resection. Histology concluded that the bladder was infiltrated by a poorly differentiated carcinoma with independent cells consistent with a gastric origin. The patient was to be treated with palliative chemotherapy.

We report a case of a 52-year-old patient who presented with symptoms such as stomach bleeding and a buildup of fluid in the stomach (ascites). The doctors diagnosed the patient with gastric cancer. The doctors also noted a thickening in the wall of the bladder during a CT scan. After more investigations, they discovered that the cancer from the stomach had spread to the bladder (metastasis).

Assessment of histology's performance compared with PCR in the diagnosis of Helicobacter pylori infection.

Aim: Histology is the most widely used test to detect H. pylori. PCR is less used but allows the detection of both infection and antibiotics' resistance. Methods: We conducted a monocentric cross-sectional study, collecting 97 symptomatic patients to assess the diagnostic performance of histology in the detection of H. pylori infection compared with PCR. Results: Sensitivity of histology in comparison with PCR was 81.5% and specificity was 56.3%. A history of anti-H. pylori therapy intake, as well as the density of the bacterium on the gastric sample and the presence of gastric atrophy, were significantly correlated to the PCR's result in terms of H. pylori detection. Conclusion: Thus, histology can be considered as an efficient test compared with PCR in H. pylori detection.

Helicobacter pylori is a type of bacteria that can cause diseases in the stomach and the upper part of the small intestine. A number of different methods are applied by scientists to determine if this bacterium is present. In our research, we specifically examined the accuracy of two types of tests ­ one where doctors examine tissues under the microscope to find signs of the bacteria (pathological test), and another where they use a method called PCR to find the bacteria's genetic material. Our aim was to determine which test worked better.

Imatinib mesylate-induced acute hepatotoxicity.

INTRODUCTION: Imatinib is a first-line selective tyrosine kinase inhibitor used for the treatment of chronic myeloid leukemia. Although imatinib-induced hepatotoxicity may aggravate the patient's clinical condition and alter the treatment plan, the mechanism of imatinib-induced hepatotoxicity has rarely been investigated. CASE REPORT: We report a 51-year-old man, suffering from acute toxic hepatitis after 5 months of imatinib treatment for chronic myeloid leukemia. MANAGEMENT AND OUTCOME: The outcome was favorable after discontinuation of treatment with normalization of biological liver function after 12 weeks. The treatment was switched to nilotinib without any incidents. DISCUSSION: Regular liver function test monitoring is recommended during imatinib treatment. In fact of acute hepatic toxicity, treatment with imatinib should be stopped in the case of cytolysis more than five times the upper limit of normal.

Clinical and therapeutic features of Plummer-Vinson syndrome in a Tunisian population: a case series.

Plummer Vinson syndrome (PVS) is a rare entity and most publications are case or series of cases. Thus, we report a series from southern Tunisia. Our aim was to analyse the epidemiological and clinical characteristics, the therapeutic modalities as well as the evolution of this pathology. Thus we carried out a retrospective study from 2009 until 2019. For each patient with PVS, we collected the epidemiological, clinical, paraclinical data and therapeutic modalities. A total of 23 patients were enrolled with a median age of 49.52 years [18-82 years] and a clear female predominance (M/F=2/21). The median duration of dysphagia was 42 months [4-92 months]. Moderate microcytic hypochromic anemia was noted in 16 patients. The anemia was without obvious cause in 60.8% (n=14) of cases. The main endoscopic finding was a diaphragm in the cervical area. Treatment was based on iron supplementation followed by endoscopic dilatation with Savary dilators in 90.9% (n=20) and balloons for 9.1% of patients (n=2). Dysphagia recurred in 5 patients after a median of 26.6 months [2-60 months]. Three cases of PVS were complicated by esophageal squamous cell carcinoma. In conclusion, our series confirms that PVS affects mostly women. Anemia is frequently noted in these patients. Treatment is based on endoscopic dilatation which is often an easy and risk-free procedure and iron supplementation.

Tunisian consensus on the management of Helicobacter Pylori infection.

Helicobacter pylori infection is the most common infectious disease worldwide. It is associated with duodenal and gastric ulcer disease and the risk of gastric neoplasia. The management of helicobacter pylori infection currently represents a real challenge for clinicians, given the ever-increasing rate of resistance of Helicobacter pyolori to various antibiotics. In this consensus document, we present recommendations adapted to the Tunisian context, including indications for the detection of helicobacter pylori infection, indications for the use of different diagnostic methods, and a therapeutic strategy for the management of Helicobacter pylori infection.

Anti-mitochondrial antibodies detection assays for diagnosis of primary biliary cholangitis in southern Tunisia population / Techniques de détection des anticorps anti-mitochondries pour le diagnostic de cholangite biliaire primitive : étude dans une population sud-tunisienne

Anti-mitochondrial antibodies (AMA) represent serological markers of primary biliary cholangitis (PBC). Investigation of these autoantibodies can be performed by indirect immunofluorescence (IIF) on tissue sections or immunodot using M2 and M2-3E antigens. We aimed to evaluate the concordance of these immunological tests and their performance in PBC diagnosis. We reviewed sera which were tested for autoimmune liver disease anti-bodies by IIF (EUROIMMUN®) and immunodot (EUROIMMUN®). Results of IIF (AMA) and immunodot (anti-M2 and anti-M2-3E) were analyzed. A focus was given on positive results for AMA and/or anti-M2 and/or anti-M2-3E. According to available clinical data, patients were divided into two groups "PBC" and "Non PBC". Three-hundred-nineteen sera were tested by both techniques. Results of AMA, anti-M2 and anti-M2-3E were concordant in 296 cases (92.8%). Indeed, the three biomarkers were negative in 237 cases (74.3%) and positive in 59 cases (18.5%). Eighty-two sera were tested positive for AMA and/or anti-M2 and/or anti-M2-3E. Clinical data were available for 30 patients. In "PBC" group (n = 15), AMA, anti-M2 and anti-M2-3E antibodies were positive in 14/15 cases. PBC diagnosis was made in 12/15 patients without requiring liver biopsy. In "non PBC" group (n = 15), AMA, anti-M2 and antiM2-3E antibodies were positive in 9/15 cases. However, PBC diagnosis was not reached in the absence of other diagnostic criteria. IIF represents a first-line technique for AMA detection while immunodot is useful to confirm antigenic specificity in IIF-AMA positive cases. Anti-M2 and/or anti-M2-3E can be detected in some IIF-AMA negative cases. Interpretation of these tests'results relays mainly on clinical context.

Les anticorps anti-mitochondries (AAM) peuvent être recherchés par immunofluorescence indirecte (IFI) ou immunodot en utilisant les Ag M2 et M2-3E. Afin d'évaluer la concordance de ces tests et leur intérêt dans le diagnostic de cholangite biliaire primitive (CBP), nous avons comparé les résultats de recherche des AAM (IFI), anti-M2 et anti-M2-3E (immunodot) de 319 sérums. Selon les données cliniques disponibles, les patients avec au moins un marqueur positif ont été classés en deux groupes « CBP ¼ et « non CBP ¼. Les résultats des trois marqueurs étaient concordants dans 296 cas (92,8 %). Au moins un marqueur était positif dans 82 cas. Dans le groupe « CBP ¼ (n = 15), les trois marqueurs étaient positifs dans 14 cas. Dans 12 cas, le diagnostic était retenu sans recours à la biopsie hépatique. Dans le groupe « non CBP ¼ (n = 15), les trois marqueurs étaient positifs dans neuf cas, mais les autres critères de CBP n'étaient pas remplis. L'IFI demeure la technique de première intention pour la recherche des AAM ; l'immunodot permet de confirmer la spécificité antigénique. L'interprétation, notamment des cas discordants, repose surtout sur le contexte clinique.

Prevalence of Helicobacter pylori resistance to clarithromycin in Tunisia.

Background. Helicobacter pylori (H. pylori) resistance to clarithromycin is increasing worldwide. Data on the prevalence of H. pylori resistance are limited in Tunisia.Gap statement. Given that H. pylori resistance to clarithromycin has not been studied in Tunisia since 2010, there was a need to determinate its prevalence and the principal mutations implicated in this resistance.Aim. The aims were to define the prevalence of H. pylori infection among symptomatic patients and to determinate the level of clarithromycin resistance among these patients and the main mutations conferring this resistance.Methods. We conducted a cross-sectional study from March 2017 to February 2020 in the Hepato-Gastroenterology Department of Hedi Chaker University Hospital in Sfax that included 124 Tunisian patients who underwent gastroduodenal endoscopy with biopsies. Mutations conferring resistance to clarithromycin were detected using the Allplex H. pylori and ClariR PCR Assay.Results. Out of 124 biopsies, 101 (81.5 2 %) were PCR-positive for H. pylori. Mutations conferring resistance to clarithromycin were detected in 30/95 (31.6 %) of patients. The rate of primary resistance was 25.3 % and of secondary resistance 62.5 %. The most frequently detected mutation was A2143G (86, 90%) followed by A2142G (11, 36%). Seven patients had a double mutation A2143G-A2142G. The factors independently associated with resistance to clarithromycin were diabetes, high blood pressure, the presence of a bulbar ulcer on endoscopy and the presence of gastric atrophy on histology.Conclusion. Detection of more than 25 % of strains with clarithromycin resistance mutations makes the H. pylori first-line treatment with clarithromycin questionable in our setting, and a review of empirical treatment of H. pylori is urgently needed.

Role of splenic and hepatic stiffness in predicting esophageal varices.

INTRODUCTION: Non-invasive assessment of portal hypertension in chronic liver disease is a topical subject. AIM: Evaluate accuracy of splenic (SS) and liver (LS) stiffness in predicting the presence of esophageal varices (OV) in chronic hepatitis B patients and determine a non-invasive composite score. METHODS: This was a monocentric cross-sectional study, including carriers of chronic hepatitis B. All patients benefited of SS and LS measurement by impulse elastography (FibroScan Echosens), FIB-4 score calculation and oeso-gastro-duodenal endoscopy. RESULTS: We included 84 patients. The average age was 49.04 ± 12.8 years. The mean value of SS and LS was significantly higher in presence of OV; p=0.000. At respective threshold values of 33.1 KPa and 43KPa, SS was able to predict the presence of OV and large OV with AUROC of 0.795 and 0.906. At respective threshold values of 7.75 KPa and 13.55 KPa, LS was able to predict the presence of OV and large OV with AUROC of 0.836 and 0.894. Arithmetic sum of SS, LS and FIB-4 values was able to predict the presence of OV and large OV with AUROC of 0.918 and 0.942. CONCLUSION: SS and LS are simple and reliable non-invasive tools for predicting OV and large OV. Their association with FIB-4 score improves their diagnostic accuracy.

Short-term maximal performance, alertness, dietary intake, sleep pattern and mood states of physically active young men before, during and after Ramadan observance.

PURPOSE: To assess changes in short-term maximal performance, alertness, dietary intake, sleep pattern and mood states of physically active young men before (BR), during and after Ramadan observance. METHODS: Twelve physically-active men (age: 21.9±2.4yrs, height:1.77±0.09m, body-mass: 72.6±7.8kg, exercising: ≥3h/week) performed the 5-jump and the digit-cancellation (alertness) tests 15-days BR, on the first (FR) and last 10-days of Ramadan (ER) and 10-days (AR10) and 20-days (AR20) after Ramadan. During each period, sleep pattern (Pittsburgh-Sleep-Quality-Index (PSQI)), mood states (Profile-of-Mood-States (POMS)) and dietary intake were recorded. RESULTS: No significant changes in the 5-jump, digit-cancellation test and POMS parameters appeared during and after Ramadan relative to BR. However, the PSQI total score was lower during FR compared to AR10 (p<0.001). Specifically, the subjective sleep quality was lower (i) at BR compared to FR (p<0.05), AR10 (p<0.01) and AR20 (p<0.01) and (ii) at ER and AR20 compared to FR (p<0.05). The sleep duration (i) increased at FR (p<0.05) and (ii) decreased at AR10 (p<0.01) and AR20 (p<0.05) compared to BR. Sleep disturbances were significantly greater (i) at BR compared to FR (p<0.01), ER (p<0.01), AR10 (p<0.05) and AR20 (p<0.05) and (ii) at AR10 and AR20 compared to FR and ER (p<0.05). In terms of diet, the fractional contribution of carbohydrate (%) was lower and the dietary fat content (g) was higher during ER than AR10 and AR20 (p<0.05). Further, the dietary protein (in %) was significantly lower during FR compared to BR (p<0.01), ER (p<0.05), AR10 (p<0.05) and AR20 (p<0.05). CONCLUSION: Ramadan had no-adverse effects on the 5-jump performance, alertness, or mood states in physically active young men. However, the sleep duration was shorter and the sleep quality was improved following compared to during Ramadan. The fractional intake of fat also increased at the expense of carbohydrate during Ramadan, and the protein intake was lower at the beginning of Ramadan than before, at the end of and after Ramadan.

Sleep Patterns, Alertness, Dietary Intake, Muscle Soreness, Fatigue, and Mental Stress Recorded before, during and after Ramadan Observance.

Ramadan is one of the pillars of the Islamic creed. Its observance commonly causes chrono-biological changes. The present study examined sleep and alertness during Ramadan observance relative to data collected before and after Ramadan in a sample of young, physically active men. Information was also collected on dietary intake, muscle soreness, fatigue, and mental stress over the three periods. Fourteen physically active men (age: 21.6 ± 3.3 years, height: 1.77 ± 0.06 m, body-mass: 73.1 ± 9.0 kg) completed the Hooper questionnaire and the Pittsburgh Sleep Quality Index (PSQI) and responded to the digit cancellation test (DCT) fifteen days before Ramadan, during the last ten days of Ramadan and 20 days after Ramadan. The PSQI results indicated that sleep duration was significantly longer before Ramadan (p = 0.003) and after Ramadan (p = 0.04) compared to during Ramadan and was longer before Ramadan than after Ramadan (p = 0.04). In addition, the sleep efficiency was lower during Ramadan in comparison to before Ramadan (p = 0.02) and after Ramadan (p = 0.04). The daytime dysfunction score increased during Ramadan in comparison with before Ramadan (p = 0.01) and after Ramadan (p = 0.04), and the sleep quality score was higher during (p = 0.003) and after Ramadan (p = 0.04) as compared to before Ramadan. The sleep disturbance score increased during Ramadan relative to before Ramadan (p = 0.04). However, Ramadan observance had no significant effect on sleep latency. Mental alertness also decreased at the end of Ramadan compared to before (p = 0.003) or after Ramadan (p = 0.01). Dietary intake, muscle soreness, fatigue, and mental stress as estimated by the Hooper questionnaire remained unchanged over the three periods of the investigation (p > 0.05). In conclusion, Ramadan observance had an adverse effect on sleep quantity and on mental alertness, but not on sleep quality. However, dietary intake, muscle soreness, fatigue, and mental stress remained unaffected.

Effect of Ramadan fasting on feelings, dietary intake, rating of perceived exertion and repeated high intensity short-term maximal performance.

The present study was designed to investigate the effect of Ramadan fasting on feelings, dietary intake, rating of perceived exertion (RPE) and repeated high-intensity short-term maximal performance. Thirteen physically active men (age: 21.2 ± 2.9 years, height: 175.6 ± 5.6 cm, body-mass: 72.4 ± 8.6 kg) performed a 5-m shuttle run test (6 × 30-s + 35-s of recovery in-between) during five experimental periods: fifteen days before Ramadan (BR), the first ten days of Ramadan (FR), the last ten days of Ramadan (ER), ten days after Ramadan (AR10) and 20 days after Ramadan (AR20). The study was carried out in Tunisia during the 2016 Ramadan month. During the 5-m shuttle run test, higher distance (HD), total distance (TD) and fatigue index (FI) were recorded. RPE was determined after a 5-min warm-up and after each repetition of the 5-m shuttle run test (the mean RPE score during the test was calculated). Moreover, a feelings scale (FS) was used after the warm-up and after the end of the 5-m shuttle run test. During the five experimental periods, dietary intake was assessed. The results showed that HD, TD and FI during the 5-m shuttle run test were not affected by Ramadan observance (p > 0.05). Likewise, FS scores recorded after the warm-up and the 5-m shuttle run test were not affected by Ramadan fasting (p > 0.05). However, mean RPE scores during the 5-m shuttle run test were significantly lower at ER (4.06 UA), AR10 (3.86 UA) and AR20 (3.71 UA) in comparison to BR (4.51 UA) (p < 0.05). The results showed also that Ramadan fasting has no adverse effect on energy intake, protein (g and %), fat (g and %) and carbohydrate (g). However, the fractional contribution of carbohydrate was significantly higher AR10 than FR (53.1% vs. 45.8%) and ER (53.1% vs. 46.5%) and AR20 than FR (5.92% vs. 45.8%) (p < 0.05). In conclusion, Ramadan fasting has no adverse effect on feelings, dietary intake, and short-term maximal performance. However, the RPE during repeated high intensity short-term maximal exercise was reduced AR20 in comparison to ER. Abbreviations: AR: After Ramadan; AR10: Ten days after Ramadan; AR20: Twenty days after Ramadan; BR: Fifteen days before Ramadan; ER: Last ten days of Ramadan; FI: Fatigue index; FR: First ten days of Ramadan; FS: Feelings scale; HD: Higher distance; PSQI: The Pittsburgh Sleep Quality Index; RPE: Rating of Perceived Exertion Scale; TD: Total distance.

Histopathological findings in cholecystectomies specimens: A single institution study of 20 584 cases.

BACKGROUND: The histopathological examination of cholecystectomy specimens has not been standardized with a debate concerning the routine and the selective approach. The aim of this study was to assess the information obtained from routine histopathological examination of cholecystectomy specimens. METHODS: All histopathological reports of cholecystectomy specimens between January 2003 and December 2016 were analyzed, including a clinical diagnosis of benign gallstone disease or cholecystitis. RESULTS: A total of 20,584 reports were examined. The mean age of patients was 54.2 years. Patients aged more than 60 years represent 37.6% of the study population. Of all patients, 15,973 (77.6%) were females. Incidental gallbladder cancers (GBC) were present in 155 cholecystectomies specimens (0.8%). 67.1% of GBC are at T2 and T3 stage. Granulomatous cholecystitis was diagnosed in only 19 cases (0.1%). GBC were more prevalent in older patients (P < 10-6) and cholesterolosis was more prevalent in young patients (P < 10-6). There was no gender predilection for GBC (P = 0.739). CONCLUSIONS: The rate of incidental gallbladder carcinoma in our study is low, yet, we found a higher proportion of T2 and T3 carcinomas stage. Granulomatous cholecystitis may need further investigations and treatments. When a selective approch of histopathological examination of cholecystectomy specimens is used, it is important to take into account that clinical parameters are significantly associated with gallbladder cancer.

Potential role of liver enzyme levels as predictive markers of glucose metabolism disorders in a Tunisian population.

The relationship between liver enzymes and T2D risk is inconclusive. We aimed to evaluate the association between liver markers and risk of carbohydrate metabolism disorders, as well as their discriminatory power, for T2D prediction. This cross-sectional study enrolled 216 participants classified as normoglycemic, prediabetic, newly diagnosed diabetics, and diagnosed diabetics. All participants underwent anthropometric and biochemical measurements. The relationship between hepatic enzymes and glucose metabolism markers was evaluated by analyses of covariance. The associations between liver enzymes and incident carbohydrate metabolism disorders were analyzed through logistic regression and their discriminatory capacity to predict T2D by ROC analysis. High AP, ALT, γGT, and AST levels were independently related to decreased insulin sensitivity. Interestingly, a higher AP level was significantly associated with an increased risk of prediabetes (p = 0.017), newly diagnosed diabetes (p = 0.004), and T2D (p = 0.007). An elevated γGT level was an independent risk factor for T2D (p = 0.032) and undiagnosed T2D (p = 0.010) in prediabetic and normoglycemic subjects, respectively. In ROC analysis, AP was a powerful predictor of incident diabetes and significantly improved T2D prediction. Liver enzymes within the normal range, specifically AP levels, are associated with increased risk of carbohydrate metabolism disorders and significantly improved T2D prediction.

Genetic association and phenotypic correlation of TLR4 but not NOD2 variants with Tunisian inflammatory bowel disease.

OBJECTIVE: The common association between NOD2/CARD15 and TLR4 gene variants with inflammatory bowel disease (IBD) has not been replicated in all studies. We studied the polymorphism of these two genes in Tunisian patients with IBD. METHODS: Polymorphisms of NOD2 (R702W, G908R and L1007fs) and TLR4 (Asp299Gly and Thr399Ile) genes were analyzed in 106 patients with IBD (68 with ulcerative colitis [UC], 38 with Crohn's disease [CD]) and 160 healthy controls using polymerase chain reaction-restriction fragment length polymorphism. Genotypes and phenotypes were correlated. RESULTS: The mutated allele of TLR4-Thr399Ile was strongly associated with IBD (9.4% in IBD, 7.4% in UC and 13.2% in CD vs 2.5% in controls; P = 0.0004, 0.014 and 0.00006, respectively). Heterozygous genotypes were significantly more frequent in patients with IBD (17.0%), UC (14.7%) and CD (21.1%) than in controls (5.0%) (P = 0.0012, 0.012 and 0.001, respectively). Interestingly, the wild genotype was found to be protective (odds ratio 0.24). The mutated allele of TLR4-Asp299Gly was more frequent in controls (6.8%) than in patients with IBD (2.9%). A phenotypic correlation of Asp299Gly-AG genotype with arthritis in UC patients was detected (P = 0.003). Regarding the NOD2 gene, the common variations studied were not polymorphic and there was no genetic association with IBD. CONCLUSION: The TLR4-Thr399Ile variant was strongly associated with susceptibility to IBD, whereas TLR4-Asp299Gly seems to play a role in the clinical expression of UC. The rarity and non-association of NOD2 mutations with IBD may reveal a genetic characteristic of the population in our region.

Health-related quality of life in patients with inflammatory bowel disease: a Tunisian study.

BACKGROUND: Inflammatory bowel disease (IBD) impairs healthrelated quality of life (HRQOL). AIM: To describe HRQOL in Tunisian patients with IBD and to compare it with a reference population. METHODS: HRQOL was assessed with the Tunisian versions of the Medical Outcomes Study Short Form 36 (SF 36) and the Inflammatory Bowel Disease Questionnaire (IBDQ-32). RESULTS: Sixty two IBD patients were included (23 CD, 39 UC). The control group consisted of 62 healthy subjects. We have shown that HRQOL in Tunisian patients with IBD, measured with the SF-36, is lower than that of a Tunisian reference population without significant differences. Using the IBDQ-32, we found lower scores in women, in patients with CD, with material deprivation, and with active disease. Factors such as the experience of previous relapses or hospitalisations, disease duration, previous resective surgery, remission duration, maintenance therapy, marital status and smoking status do not have a significant impact on HRQOL in these patients. CONCLUSION: Most patients with established inflammatory bowel disease showed only minor impairment of their HRQOL. However, women and the patients suffering from active and Crohn's disease as well as the materially deprived patients are most at risk.. Better clinical care and psychological counselling for these more vulnerable groups may improve their quality of life.

[Management of hepatitis B virus reactivation during chemotherapy or immunosuppressive therapy]. / Prise en charge de la réactivation virale B au cours d'un traitement chimiothérapique ou immunosuppresseur.

Reactivation of viral hepatitis B is a well-known complication in patients receiving chemotherapy or immunosuppressive therapy; its incidence reaches 50%. This reactivation is associated with a high rate of morbidity and mortality. Prophylactic treatment of viral reactivation with lamivudine resulted in lowering the incidence of this risk and improving prognosis in recent studies. Patients with hematological malignancies and other cancers require a precise assessment of their hepatitis B status and adequate management. There is not yet a consensus about the appropriateness of prophylactic treatment of occult hepatitis B infection or of pretreatment virologic assessment, especially measurement of viral DNA.