The neoplastic change in patients with Crohn's disease is usually seen in the form of adenocarcinoma. Primary gastrointestinal lymphoma complicating chronic inflammatory bowel diseases is thought to be uncommon. This report describes a case of gastrointestinal lymphoma in a 12-year-old boy with Crohn's disease of one-year duration that initially manifested as an abdominal mass. Although Crohn's disease may present as a palpable abdominal mass, changing symptomatology should always warrant consideration of developing lymphoma complicating inflammatory bowel diseases. It is our hope that this case report gives the clinician an insight into the possibility of lymphoma development, even in the early course of the disease, and stresses the importance of obtaining a reliable histological diagnosis whenever possible.
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J Cell Biol
February 2025
Department of Cell Biology, Yale University School of Medicine, New Haven, CT, USA.
Mutations that increase LRRK2 kinase activity have been linked to Parkinson's disease and Crohn's disease. LRRK2 is also activated by lysosome damage. However, the endogenous cellular mechanisms that control LRRK2 kinase activity are not well understood.
View Article and Find Full Text PDFJ Neurol
January 2025
Sorbonne Université, Assistance Publique, Hôpitaux de Paris, Inserm U974, Department of Internal Medicine and Clinical Immunology, Pitié-Salpêtrière University Hospital, Paris, France.
Objectives: Granulomatous myositis (GM) is a rare entity whose precise clinical features and therapeutic outcomes have not yet been well defined. Given the limited evidence, data from a large cohort of patients is needed to aid in the recognition and management of this condition.
Methods: We retrospectively analyzed our institutional databases to identify patients who had myositis and non-caseating granuloma on muscle biopsy (GM).
Aliment Pharmacol Ther
January 2025
Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
Background: The pharmacokinetics of biologic agents can differ between children and adults with inflammatory bowel disease (IBD), often necessitating modified paediatric dosing strategies.
Aims: To define the exposure-response relationship of vedolizumab in the paediatric IBD VedoKids cohort including the effect of baseline clearance on deep biochemical remission (normal C-reactive protein [CRP]/erythrocyte sedimentation rate [ESR] and steroid-free remission) at 30 weeks, and to use population pharmacokinetic models to find the best matches between adult and paediatric pharmacokinetic profiles.
Methods: We sought a pharmacokinetic model on 312 serum vedolizumab concentrations from 129 children, assisted by a published adult model as a Bayesian prior.
Gut Microbes
December 2025
School of Microbiology, University College Cork, Cork, Ireland.
Crohn's disease (CD) and ulcerative colitis (UC) are chronic relapsing inflammatory bowel disorders (IBD), the pathogenesis of which is uncertain but includes genetic susceptibility factors, immune-mediated tissue injury and environmental influences, most of which appear to act via the gut microbiome. We hypothesized that host-microbe alterations could be used to prognostically stratify patients experiencing relapses up to four years after endoscopy. We therefore examined multiple omics data, including published and new datasets, generated from paired inflamed and non-inflamed mucosal biopsies from 142 patients with IBD (54 CD; 88 UC) and from 34 control (non-diseased) biopsies.
View Article and Find Full Text PDFEndocr Metab Immune Disord Drug Targets
January 2025
Department of Stomatology, The Affiliated Huaian No.1 People's Hospital, Nanjing Medical University, No.1 Huanghe West Road, Huaian, 223300, Jiangsu Province, China.
Background: Crohn's Disease (CD) is a chronic inflammatory gastrointestinal disease. Ustekinumab (UST) has been utilized as a therapeutic option for CD patients. However, approximately 40-60% of patients exhibit an inadequate response to UST.
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