Publications by authors named "AMAR L"

Background: Primary aldosteronism can be treated medically but there is no standardised method to evaluate treatment outcomes. We aimed to develop criteria for assessing the outcomes of targeted medical treatment of primary aldosteronism, analyse outcomes across an international cohort, and identify factors associated with a complete treatment response.

Methods: An international panel of 31 primary aldosteronism experts used the Delphi method to reach consensus on the definition of complete, partial, or absent biochemical and clinical outcomes of medical treatment of primary aldosteronism.

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Inappropriate aldosterone excess plays a key role in the pathophysiology of various cardiovascular, endocrine and renal diseases. Mineralocorticoid receptor (MR) antagonists (MRAs) such as spironolactone block of the harmful effects of aldosterone and are recommended treatment in these various conditions. However, the sexual adverse effects of spironolactone due to its lack of specificity for the MR and the risk of hyperkalemia in patients with decreased renal function, limit its use.

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  • This study aimed to improve the identification of malignancy risk and genetic status in patients with primary paraganglioma or pheochromocytoma (PPGL) by assessing various biomarkers.
  • Conducted over four years with 231 patients, the study found that tumor analysis was better than germline testing for determining genetic status, with specific biomarkers like plasma succinate levels and miR-483-5p showing promise in predicting metastasis.
  • The combination of biomarkers, such as SDHB immunostaining and TERT promoter methylation, significantly enhanced the predictive accuracy for both SDHx genetic status and metastatic potential.
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Several high-quality, randomized, sham-controlled trials have provided evidence supporting the efficacy and safety of radiofrequency, ultrasound and alcohol catheter-based renal denervation (RDN) for reducing blood pressure (BP). A French clinical consensus document has therefore been developed to propose guidance for the appropriate use of RDN in the management of hypertension along with a dedicated care pathway and management strategy. The French experts group concluded that RDN can serve as an adjunct therapy for patients with confirmed uncontrolled, resistant essential hypertension despite treatment with≥3 antihypertensive drugs, including a long-acting calcium channel blocker, a renin-angiotensin system blocker and a thiazide/thiazide-like diuretic at maximally tolerated doses.

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  • - The study focused on understanding how common secondary hypertension (2HTN) is in young adults aged 18 to 40, finding that nearly 30% of patients had 2HTN.
  • - The most common causes of 2HTN were identified as primary aldosteronism, renovascular hypertension, and kidney diseases, with certain factors like being female and having a lower BMI linked to a higher prevalence.
  • - Based on their findings, the researchers recommend that all young adults with hypertension should be screened for secondary causes, as there is a significant risk present regardless of age or blood pressure levels.
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Phaeochromocytomas and paragangliomas (PPGLs) are rare neuroendocrine tumours with a strong genetic predisposition, involving over 20 genes and with germline pathogenic variants identified in 40 % of cases. The succinate dehydrogenase (SDHx) genes are the most commonly implicated in hereditary PPGLs, accounting for 20 % of cases, and present unique diagnostic and treatment challenges due to their potential for multiple, recurrent, and aggressive manifestations, often necessitating lifelong follow-up. Over the past two decades, advances in biochemical and imaging assessments, management, and follow-up protocols have significantly improved care for both adult and paediatric patients.

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Phaeochromocytomas and paragangliomas (PPGL) are rare neuroendocrine tumours that arise not only in adulthood but also in childhood and adolescence. Up to 70-80% of childhood PPGL are hereditary, accounting for a higher incidence of metastatic and/or multifocal PPGL in paediatric patients than in adult patients. Key differences in the tumour biology and management, together with rare disease incidence and therapeutic challenges in paediatric compared with adult patients, mandate close expert cross-disciplinary teamwork.

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  • The study aims to identify easily measurable biomarkers that reflect the biological effects of glucocorticoids in patients with Cushing's syndrome through whole blood transcriptome analysis.
  • It analyzed transcriptomic profiles from blood samples of different patient groups, creating a prediction model that effectively distinguishes between those with overt Cushing's syndrome and other conditions.
  • Findings indicate that the transcriptome can indicate glucocorticoid levels, with FKBP5 expression showing potential as a nonhormonal marker for diagnosing Cushing's syndrome.
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Background: Little real-life information is available on the clinical characteristics of information and communication technologies (ICTs) users, particularly in the context of hypertension and home blood pressure measurement (HBPM). This retrospective observational study describes HBPM practices obtained through the Hy-Result system, a validated app designed to help patients perform HBPM and understand their results through an automatic interpretation of the readings using web interface.

Methods: We analyzed 19,176 HBPM reports (sequence of 1 to 7 days of measurements; 3 in the morning, 3 in the evening) collected in real life circumstances from two groups of users: primary care (Prim) and hypertension center (Hosp).

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  • Endocrine hypertension (EHT) is associated with various hormonal conditions like pheochromocytoma, Cushing's syndrome, and primary aldosteronism, leading to unique metabolic changes compared to primary hypertension (PHT).
  • A multicenter study of 263 patients analyzed the relationship between adrenal steroid levels and metabolomic alterations, revealing significant associations among different hormone levels and specific metabolites.
  • The findings suggest that elevated cortisol, cortisone, and catecholamines are linked to distinct metabolic profiles in EHT, with catecholamines being particularly important in pheochromocytoma cases.
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Background: Current guidelines and consensus documents recommend withdrawal of mineralocorticoid receptor antagonists (MRAs) before primary aldosteronism (PA) subtyping by adrenal vein sampling (AVS), but this practice can cause severe hypokalemia and uncontrolled high blood pressure. Our aim was to investigate if unilateral PA can be identified by AVS during MRA treatment.

Methods: We compared the rate of unilateral PA identification between patients with and without MRA treatment in large data sets of patients submitted to AVS while off renin-angiotensin system blockers and β-blockers.

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Background: No randomised controlled trial has ever been done in patients with metastatic phaeochromocytomas and paragangliomas. Preclinical and first clinical evidence suggested beneficial effects of sunitinib. We aimed to evaluate the safety and efficacy of sunitinib in patients with metastatic phaeochromocytomas and paragangliomas.

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T-cell acute lymphoblastic leukemia (T-ALL) is a rare hematologic malignancy with a unique set of clinical challenges when it occurs in adults. This case report presents the complex management of a 32-year-old male with T-ALL who developed symptomatic hyperleukocytosis and tumor lysis syndrome. Upon presentation, the patient exhibited a constellation of critical clinical and laboratory findings, including leukocytosis, anemia, thrombocytopenia, hyperkalemia, high-anion gap metabolic acidosis, and acute kidney injury.

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The semicircular canals of the inner ear are involved in balance and velocity control. Being crucial to ensure efficient mobility, their morphology exhibits an evolutionary conservatism attributed to stabilizing selection. Release of selection in slow-moving animals has been argued to lead to morphological divergence and increased inter-individual variation.

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We report a large series of 40 patients presenting EPAS1-mutated paraganglioma (PGL) in whom we investigated a cause underlying chronic hypoxia. Four patients suffered from hypoxaemic heart disease. In patients with available haemoglobin electrophoresis results, 59% presented with a haemoglobin disorder, including six with sickle cell disease, five with sickle cell trait and two with heterozygous haemoglobin C disease.

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Purpose: Abdominal aorta calcium (AAC) burden and dilatation are associated with an increased risk of mortality. The purpose of this study was to investigate determinants of AAC and abdominal aorta size in patients with essential hypertension.

Materials And Methods: Patients with uncomplicated essential hypertension who had undergone non-enhanced abdominal CT to rule out secondary hypertension in addition to biological test were recruited between 2010 and 2018.

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Adult and paediatric patients with pathogenic variants in the gene encoding succinate dehydrogenase (SDH) subunit B (SDHB) often have locally aggressive, recurrent or metastatic phaeochromocytomas and paragangliomas (PPGLs). Furthermore, SDHB PPGLs have the highest rates of disease-specific morbidity and mortality compared with other hereditary PPGLs. PPGLs with SDHB pathogenic variants are often less differentiated and do not produce substantial amounts of catecholamines (in some patients, they produce only dopamine) compared with other hereditary subtypes, which enables these tumours to grow subclinically for a long time.

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Fluoroquinolones (FQ), commonly prescribed antibiotics, may trigger aortic and carotid dissections. We report three successive cases of visceral artery dissection: one patient with celiac trunk dissection and two with dissection of the superior mesenteric artery. These events occurred up to 4 months after 7 to 14 days of FQ treatment (2 cases of ofloxacin, 1 of norfloxacin).

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Background: Medication adherence plays a critical role in controlling the evolution of chronic disease, as low medication adherence may lead to worse health outcomes, higher mortality, and morbidity. Assessment of their patients' medication adherence by clinicians is essential for avoiding inappropriate therapeutic intensification, associated health care expenditures, and the inappropriate inclusion of patients in time- and resource-consuming educational interventions. In both research and clinical practices the most extensively used measures of medication adherence are patient-reported outcome measures (PROMs), because of their ability to capture subjective dimensions of nonadherence.

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Hypertension (HTN) affects more than 30% of adults worldwide. It is the most frequent modifiable cardiovascular (CV) risk factor, and is responsible for more than 10 million death every year. Among patients with HTN, we usually distinguish secondary HTN, that is HTN due to an identified cause, and primary HTN, in which no underlying cause has been found.

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Introduction: Serrated lesions (SLs) including traditional serrated adenomas (TSA), large hyperplastic polyps (HP) and sessile serrated lesions (SSLs) are associated with high incomplete resection rates. Margin ablation combined with EMR (EMR-T) has become routine to reduce local recurrence while cold snare polypectomy (CSP) is becoming recognized as equally effective for large SLs. Our aim was to evaluate local recurrence rates (LRR) and the use of margin ablation in preventing recurrence in a retrospective cohort study.

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Article Synopsis
  • Pheochromocytomas and paragangliomas are rare neuroendocrine tumors that arise in the adrenal glands and other locations, with malignancy marked by distant metastases.
  • About 40% of these tumors are inherited and may be linked to various hereditary syndromes, with management provided by specialized centers in France.
  • Diagnosis and treatment require a comprehensive approach considering clinical symptoms, hormonal levels, genetics, and imaging, with multidisciplinary interventions including surgery, radiotherapy, and targeted medical therapies like sunitinib and temozolomide.
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Genomic instability is a prominent hallmark of cancer, however the mechanisms that drive and sustain this process remain elusive. Research demonstrates that numerous cancers with increased levels of genomic instability ectopically express meiosis-specific genes and undergo meiomitosis, the clash of mitotic and meiotic processes. These meiotic genes may represent novel therapeutic targets for the treatment of cancer.

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