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6407 citation(s) found for "Ma, Christopher".

Global conversations in adult congenital heart disease webinar series: a global health initiative to enhance education in adult congenital heart disease
Bravo‐Jaimes, Katia , Sharma, Grishma , Guerrero‐Chalela, Carlos‐Eduardo , García, Edgar, Valdez‐Ramos, Miriam , Hernandez, Jackelyn, Cornejo-Guerra, Jose Antonio, Mouratian, Mariela , McLeod, Christopher J., Bravo-Jaimes, Katia , Guerrero-Chalela, Carlos-Eduardo , Cornejo-Guerra, José Antonio , McLeod, Christopher J.

Cardiology in the Young | April 13, 2026 | Volume: 36 | Issue: 3 | Pages: 580-587

10.1017/s1047951126111901 Get It

Abstract Background: Specialised knowledge in adult congenital heart disease is crucial but often lacking, particularly in resource-limited settings. The Global Conversations in Adult Congenital Heart Disease webinar series was initiated to provide accessible, global education via virtual platforms. Objective: This study evaluates the attendance patterns, participant demographics, knowledge outcomes, and audience feedback of the Global Conversations in Adult Congenital Heart Disease webinar series , analysing 19 monthly sessions conducted from October 2023 to April 2025. Methods: Registration data, session viewership, and total series reach were recorded. Demographics were collected per session. Pre- and post-session quizzes were used to assess changes in knowledge; scores from these independent groups were compared using the Mann–Whitney U test. Post-webinar surveys collected improvement suggestions. Results: Out of 1,956 registrants from 89 countries, 54.6% attended the sessions, representing 1,068 participants from 64 nations: mainly Colombia (30.9%), Peru (18%), the USA (14.1%), and Mexico (9.9%). Median quiz scores improved from 50% pre-session ( n = 120) to 100% post-session ( n = 108), a statistically significant gain ( p = 0.035). Notably, 29% had no prior adult congenital heart disease education. Most post-webinar survey respondents rated case presentations and discussions as excellent (75.0%) or good (20.1%). Qualitative feedback suggested areas for improvement included audiovisual quality, audience engagement, content delivery, and language accessibility. Conclusion: The Global Conversations in Adult Congenital Heart Disease webinar series successfully engaged a diverse international audience and showed significant differences in quiz scores between pre- and post-session independent groups, demonstrating the potential benefit and feasibility of virtual education in bridging gaps in adult congenital heart disease training, particularly in resource-limited countries.
CNS tumor type prevalence according to age group: An analysis of 21 000 cases confirmed by methylation profiling, with a focus on adolescents and young adults
Fonseca, Adriana , Yefet, Leeor, Singh, Omkar , Dampier, Christopher H. , Dazelle, Karen , Lam, Michelle , Abdullaev, Zied , Chung, Hye‐Jung, Quezado, Martha, Raffeld, Mark , Lee, Ina, Nasrallah, MacLean, Bennett, Julie, Bouffet, Eric, Poria, Dipak, Wesseling, Pieter, Bent, Martin van den, Wen, Patrick Y, Varlet, Pascale, Tauziède-Espariat, Arnault, Zadeh, Gelareh, Aldape, Kenneth, Singh, Omkar , Dampier, Christopher H , Quezado, Martha , Gagan, Jeffrey , Lee, Ina , Nasrallah, MacLean , Bennett, Julie , Bouffet, Eric , Poria, Dipak , Wesseling, Pieter , van den Bent, Martin J , Wen, Patrick Yung , Varlet, Pascale , Tauziède-Espariat, Arnault , Ida, Cristiane M , Zadeh, Gelareh , Aldape, Kenneth , Yefet, Leeor S. , Gagan, Jeffrey , Nasrallah, MacLean P. , Bouffet, Éric , Wesseling, Pieter , Bent, Martin J. van den , Ida, Cristiane M. , Zadeh, Gelareh

Neuro-Oncology | April 11, 2026 | Volume: 28 | Issue: 7 | Pages: 1808-1820

10.1093/neuonc/noag082 | PMID 41978543 Get It

Abstract Background Approximately 12 000 adolescents and young adults (ages 15-39, AYAs) are diagnosed with a primary central nervous system (CNS) tumor each year. DNA methylation profiling has transformed CNS tumor classification by refining diagnostic accuracy and identifying biologically distinct subtypes, but its application has not been systematically evaluated in the AYA population. In this study, we examined the spectrum of CNS tumor types across age groups, with a focus on the AYA population. Methods We assembled a large dataset of CNS tumor samples with age annotations and methylation profiles matching with high confidence to a CNS tumor type using the NCI/Bethesda classifier. Prevalence of tumor type, methylation class and DNA copy number aberrations were compared across age strata (pediatric, AYA, and adult). Results The cohort of 21 712 CNS tumors included 5351 tumors from AYAs (25%), which showed a mixed pattern, with tumors typical of childhood (eg, medulloblastoma) as well as those common in older adults (eg, glioblastoma). Several tumor types were specifically enriched in the AYA, including IDH-mutant astrocytoma, pleomorphic xanthoastrocytoma, posterior fossa group B ependymoma, and diffuse hemispheric glioma, H3 G34-mutant, among others. Distinct methylation subclasses of multiple tumor types were observed in the AYA, and patterns of genomic aberrations showed age-specific distributions. Conclusion Large-scale methylation profiling revealed unique classification patterns of CNS tumors in AYAs, with specific tumor types, subclasses, and genomic alterations enriched in this population. These data may serve as a valuable reference resource for better understanding the spectrum of CNS tumors affecting AYA patients.
Gaps in Guideline Adherence for Primary Sclerosing Cholangitis in North America—A 5‐Year Analysis
Martins, Adrielly , Reddy, A. Nagarjuna, Dean, Richard, Gordon, Stuart C. , Pratt, Daniel, Li, Michael, Forman, Lisa , Lammert, Craig , Yiman, Kidist, Gallegos‐Orozco, Juan F. , Carey, Elizabeth J. , Lytvyak, Ellina , Goldberg, David S. , Naugler, Scott, Yu, Lei, Assis, David N. , Bowlus, Christopher L., Bowlus, Christopher L. , Bonder, Alan , Schlansky, Barry L , Montano-Loza, Aldo J , Lytvyak, Ellina , Goldberg, David , Assis, David N , Levy, Cynthia , Bowlus, Christopher L , Reddy, Anish , Dean, Richard , Li, Michael, Montaño‐Loza, Aldo J. , Levy, Cynthia

Liver International | April 11, 2026 | Volume: 46 | Issue: 5 | Pages: No page available

10.1111/liv.70645 | PMID 41964270 Get It

ABSTRACT Background and Aims Primary sclerosing cholangitis (PSC) is a progressive cholestatic liver disease with a high risk of malignancy and limited therapeutic options. Both the American Association for the Study of Liver Diseases (AASLD) and the European Association for the Study of the Liver (EASL) recommend structured baseline evaluation, fibrosis staging and longitudinal surveillance. However, real‐world adherence to these practices in North America remains unclear. Methods We conducted a retrospective cohort study of 1300 patients with PSC enrolled in the Consortium for Autoimmune Liver Diseases (CALiD) registry between 2018 and 2024 across 19 centres in North America. Guideline adherence was assessed for diagnostic measures at baseline (colonoscopy to establish IBD status and noninvasive fibrosis staging) and longitudinal surveillance (colonoscopy in PSC‐IBD, abdominal imaging for hepatobiliary cancer surveillance and CA 19‐9 testing). Prescribing patterns for ursodeoxycholic acid (UDCA) were also characterised. Multivariable logistic regression was used to evaluate demographic, clinical and socioeconomic predictors of adherence. Results At diagnosis, 78.8% of eligible patients with available data underwent colonoscopy to establish IBD status, and 45% underwent noninvasive fibrosis staging. During follow‐up, only 30%–35% of patients with PSC‐IBD underwent colonoscopy annually, while abdominal imaging for hepatobiliary cancer surveillance declined from 74% at Year 1 to 51% by Year 4. CA 19‐9 testing was documented in 47% over 5‐year period. UDCA was prescribed in 51% at baseline, with median dose of 12.5 mg/kg/day. Socioeconomic factors, including lower education and household income, were associated with reduced adherence, while cirrhosis strongly predicted completion of surveillance imaging. Conclusions Adherence to guideline‐based care in PSC remains suboptimal in North America Suboptimal adherence was observed for strongly recommended practices with longstanding guideline support (colonoscopy to establish IBD status; annual CRC surveillance in PSC‐IBD) as well as practices where guideline consensus has evolved more recently or where societies differ (baseline fibrosis assessment; hepatobiliary cancer imaging). Efforts to standardise care and address socioeconomic barriers are urgently needed to improve outcomes.
Impact of positive donor blood cultures on solid organ transplant recipient outcomes
Ford, Edith , Votruba, Cassandra , Saling, Christopher , Vikram, Holenarasipur R. , Ilges, Dan , Vikram, Holenarasipur R. , Ilges, Dan

Infection Control & Hospital Epidemiology | April 10, 2026 | Volume: 47 | Issue: 6 | Pages: 547-552

10.1017/ice.2026.10454 | PMID 41958405 Get It

Abstract Objective: To define the incidence of donor-derived infection (DDI) in recipients of solid organ transplant (SOT) from donors with positive blood cultures and to assess the impact of shorter versus longer duration of targeted preemptive antibiotic therapy (PAT). Design: Retrospective, single-center, cohort study. Setting: Mayo Clinic Arizona. Patients: Recipients transplanted between 1/1/2019 and 7/1/2024 who received an organ from a donor with positive blood cultures. Methods: The primary outcome was incidence of DDI. Secondary outcomes included duration of PAT and incidence of donor blood culture contamination. Results: Among 199 SOT recipients from 167 unique donors with positive blood cultures, two recipients developed confirmed DDI within 30 days of SOT. Both cases were gram negative bacillary bacteremia not treated in donors and occurred immediately posttransplant prior to adequate recipient PAT. Six-month graft survival and recipient survival were 96.5% and 97.5% respectively. 139 recipients (69.8%) received PAT for a median duration of 7 days. There was no difference in rate of infections between recipients provided with ≤7 days versus 8–14 days of PAT for donor blood cultures; however, recipients who received 8–14 days had more Clostridioides difficile infections (CDIs) within 60 days of SOT (7.7% vs 1.5% ≤ 7 days, P = .040) and were more often discharged on intravenous antibiotics (32.3% vs 11.3%, P < .001). Conclusion: We observed a low rate of DDI following receipt of organs from donors with positive blood cultures. DDI occurred in cases without adequate donor/recipient treatment. Longer durations of targeted PAT resulted in more CDI and intravenous antibiotics on discharge.
Two Brief Steps, Better Foresight: Cognitive Screening and Adverse Outcomes in Older Adults Admitted From the Emergency Department
Moraes, Gabriel Stanziola de , Avelino‐Silva, Thiago Junqueira , Covinsky, Kenneth E. , Carpenter, Christopher R. , Umoh, Mfon , Morinaga, Christian Valle, Curiati, Pedro Kallas , Umoh, Mfon E , Curiati, Pedro K , Aliberti, Márlon J R , Carpenter, Christopher R , Avelino-Silva, Thiago Junqueira , Morinaga, Christian Valle

Journal of the American Geriatrics Society | April 10, 2026 | Volume: 74 | Issue: 5 | Pages: 1294-1303

10.1111/jgs.70378 | PMID 41958224 Get It

ABSTRACT Background Delirium predicts adverse outcomes in older emergency department (ED) patients, but many acutely ill patients without delirium have underlying cognitive impairment that goes unrecognized. Whether cognitive impairment screening improves risk prediction beyond delirium remains uncertain. We compared practical bedside screening strategies for delirium, cognitive impairment, or both for predicting 90‐day functional decline and mortality in older adults admitted from the ED. Methods A prospective cohort comprising patients aged ≥ 65 years admitted from the ED of a large hospital in São Paulo, Brazil. Trained professionals screened for delirium using the brief Confusion Assessment Method (bCAM) and for cognitive impairment using the 10‐point Cognitive Screener (10‐CS). Patients were classified as having normal cognition (bCAM negative, 10‐CS > 5), delirium (bCAM positive), or cognitive impairment without delirium (bCAM negative, 10‐CS ≤ 5). Blinded investigators assessed decline in basic activities of daily living (ADL) and mortality within 90 days of admission. Fine‐Gray models (death as a competing risk) and Cox models estimated associations with outcomes, adjusting for sociodemographic and clinical factors. Results Among 830 patients (mean age = 80 ± 9 years; women = 47%), 427 (51.5%) had normal cognition, 171 (20.6%) had delirium, and 232 (27.9%) had cognitive impairment without delirium. Among delirium‐negative patients with cognitive impairment, 52% had no documented dementia diagnosis or reported memory problems. Compared with normal cognition, cognitive impairment without delirium was associated with 90‐day functional ADL decline (sub‐HR = 1.60; 95% CI = 1.03–2.49) and mortality (HR = 2.31; 95% CI = 1.18–4.51), with risks similar to those observed in delirium. A staged strategy (bCAM first, then 10‐CS if bCAM negative) showed higher discrimination than delirium‐only or 10‐CS‐only screening. Conclusions Cognitive impairment without delirium is common, often unrecognized, and predicts 90‐day adverse outcomes in older patients admitted from the ED. A brief staged screening strategy integrating delirium assessment with cognitive impairment testing among delirium‐negative patients may enhance early detection of cognitive vulnerability and support care planning.
Health system patterns of imaging and fluid biomarker testing in the era of anti‐amyloid therapies
Robb, W Hudson , Kaur, Gurkiran , Huang, Steven K. , Martínez, Felipe Derteano, Nguyen, Ba Thang, Shin, Clifford , Conyers, Christopher T. , Grilli, Christopher, Upjohn, David P., Ortega, V E, Hohman, Timothy J., Keegan, Richard, Cogswell, Petrice M., Graff‐Radford, Jonathan, Johnson, Derek R., Ramanan, Vijay K., Koran, Mary Ellen, Huang, Steven, Nguyen, Ba, Shin, Clifford H, Grilli, Christopher B, Koran, Mary Ellen , Martinez, Felipe, Nguyen, Ba, Yang, Ming , Hohman, Timothy J. , Parent, Ephraim E. , Cogswell, Petrice M. , Graff‐Radford, Jonathan , Ramanan, Vijay K. , Koran, Mary Ellen I.

Alzheimer's & Dementia | April 8, 2026 | Volume: 22 | Issue: 4 | Pages: No page available

10.1002/alz.71343 | PMID 41950049 Get It

Abstract INTRODUCTION Anti—amyloid‐β (Aβ) therapies are reshaping Alzheimer's disease (AD) management. Understanding changes in real‐world patterns of diagnostic testing and infusion chair usage is essential for optimizing access to care. METHODS Retrospective analysis of Mayo Clinic enterprise electronic health records (Jan 2019–Mar 2025) assessed trends in AD‐relevant brain imaging, fluid biomarkers, apolipoprotein E (APOE) testing, and lecanemab infusions. Rates of amyloid‐beta (Aβ) positivity by sex and age, APOE genotype frequencies, and lecanemab treatment initiation and discontinuation were evaluated. RESULTS Following national insurance coverage changes, lecanemab infusions grew by 110 infusions per quarter to 605 in Q1 2025. Aβ positron emission tomography scans increased (+22/quarter), cerebrospinal fluid biomarker orders declined (−25/quarter), and plasma p‐tau 217 orders rapidly increased (+238/quarter). Females were more likely to be Aβ positive ( p < 0.006). APOE ‐ε4 homozygotes were less likely to initiate lecanemab (HR = 0.11, p < 0.001). DISCUSSION The adoption of anti‐Aβ therapies coincided with a rapid shift in diagnostic workflows.
Multi-Contrast MRI Inputs Enable Self-Consistent Tissue Segmentation & Robust Perivascular Space Identification
Gunter, Jeffrey L. , Preboske, Gregory M., Persons, Benjamin D., Przybelski, Scott A. , Petersen, Ronald, Jack, Clifford R, Gunter, Jeffrey L , Persons, Benjamin, Schwarz, Christopher G. , Low, Audrey , Vemuri, Prashanthi , Jack, Clifford R.

No container title available | April 7, 2026 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.64898/2026.04.03.716409 | PMID 41993560 Get It

Abstract Different MRI image contrasts are designed to highlight various tissue properties and combining them allows extension of probabilistic segmentation beyond the commonly used “gray-white-CSF” models. This work describes a fully automated method that combines T1-weighted, T2-FLAIR, and conventional T2-weighted images to provide internal consistency across prediction of tissue segmentations including segmentation of superficial and deep gray matter, white matter hyperintensities, and MR-visible perivascular spaces. Results from 773 imaging datasets from 403 participants in the Mayo Clinic Study of Aging and Mayo Clinic Alzheimer’s Disease Research Center (ADRC) are presented.
Consensus radiation therapy organ at risk constraints for NCTN trials in hematologic malignancies
Sim, Austin J. , Hoppe, Bradford S. , Ballas, Leslie K, Milgrom, Sarah A. , Terezakis, Stephanie A, Ha, Chul S. , Figura, Nicholas , Parikh, Rahul R., Grecula, J.C., Flampouri, Stella , Kelsey, Christopher R, Parikh, Rahul R. , Parikh, Rahul R , Hoppe, Bradford S , Ballas, Leslie K. , Terezakis, Stephanie A , Plastaras, John Peter , Hodgson, David C. , Ryckman, Jeffrey M. , Pinnix, Chelsea C. , Kelsey, Chris R.

JNCI: Journal of the National Cancer Institute | April 7, 2026 | Volume: No volume available | Issue: No issue available | Pages: No page available

10.1093/jnci/djag112 | PMID 41965109 Get It

Abstract Modern radiation therapy (RT) technologies allow for improved sparing of normal tissues, decreasing the risk of both acute and long-term toxicities. Existing RT dose constraints for prospective trials within the National Clinical Trials Network (NCTN) were formulated in the context of solid malignancies. As patients with hematologic malignancies are often treated with lower RT doses and are usually younger with more favorable prognoses, customized dose constraints are needed. The NRG Oncology Hematologic Malignancies Working Group (NRG HEME) commissioned a review of existing organ-at-risk (OAR) constraints from published primary literature, the NRG Center for Innovation in Radiation Oncology (CIRO), and national guidelines. Customized constraints were developed by iterative review by NRG HEME. Final recommendations were approved by radiation oncology representatives from all the lymphoma NCTN groups (NRG Oncology, Children’s Oncology Group, Alliance, ECOG-ACRIN, SWOG, Canadian Cancer Trials Group). For 49 OARs, a strict recommended constraint was determined, of which 20 were not present in CIRO. Of the remaining 29 constraints, 20 were lower, 2 were the same, and 5 used different metrics; 2 were higher than at least 1 CIRO trial constraint. Acceptable variations were determined and unacceptable variations were added for select critical OARs for plan scoring. While doses to OARs without explicit unacceptable variations should not exceed acceptable variations, violations should not be considered for plan quality assessment on trials. This consensus list of standard OAR constraints should be incorporated for all future NCTN trials in hematologic malignancies. Strict dose constraints will minimize long-term toxicities in this patient population.
Prevention and management of vaccine hesitancy
Reis, Christopher , JACOBSON, R, Jacobson, Robert M. , Reis, Christopher A. , Jacobson, Robert M

Srpski medicinski casopis Lekarske komore | April 4, 2026 | Volume: 7 | Issue: 1 | Pages: 15-22

10.5937/smclk7-62537 Get It

Vaccine hesitancy refers to the delay in accepting or refusing vaccines despite the availability of vaccination services. Well-conducted studies and trials reviewed in this article support methods both to prevent and manage vaccine hesitancy. Clinicians should know which vaccines their patients are due to receive and should use every encounter to address this issue. Research shows clinicians' recommendations increase vaccine uptake. Recommendations that patients perceive as stronger have a greater effect in increasing vaccine uptake. Using presumptive language to phrase the recommendation is more effective than presenting the vaccine conversationally as an option for the patient. When the patient counters the strong recommendation with hesitancy, the clinician should engage the patient with motivational interviewing, perhaps using a four-step process called the "Four A's".
Artificial Intelligence in Gastrointestinal Motility Diagnostics: A Systematic Review
Muggleston, Dylan , O'Grady, Greg, Varghese, Chris, Andrews, Christopher, Andrews, Christopher N. , Varghese, Chris , O'Grady, Gregory , Varghese, Chris , Andrews, Christopher N

Neurogastroenterology & Motility | April 4, 2026 | Volume: 38 | Issue: 4 | Pages: No page available

10.1111/nmo.70310 | PMID 41933458 Get It

ABSTRACT Background The assessment of gastrointestinal (GI) motility disorders is limited by the invasive, resource‐intensive, and subjective nature of current testing. Artificial Intelligence (AI) is being applied to address these challenges. This review aimed to comprehensively identify, appraise, and synthesize the spectrum of AI applications in GI motility diagnostics. Methods A systematic search of PubMed, Embase, Scopus, Web of Science, and Medline for original studies was conducted in March 2025. Results were narratively synthesized and grouped by anatomic region. Key Results Of 1383 articles, 90 primary studies met the inclusion criteria. In the esophagus ( n = 31), the primary focus was automation of High‐Resolution Esophageal Manometry (HREM), pH impedance, and Functional Luminal Imaging Probe (FLIP) panometry analysis. In the gastroduodenum ( n = 21), studies looked to improve diagnostic accuracy and interpretability of legacy electrogastrography (EGG). In the small and large intestine ( n = 19), AI was used to determine transit time and predict post‐operative ileus. In the anorectum ( n = 9), tools focused on standardizing manometry interpretation. Review of pan‐GI applications ( n = 10) highlighted AI's application to wireless capsule endoscopy and bowel sounds analysis. While promising, all areas need more rigorous research and external validation before widespread deployment. Conclusions and Inferences AI will play an essential role in improving and automating the interpretation of GI motility diagnostics. However, even the most promising models require large‐scale prospective validation before clinical implementation. Trial Registration PROSPERO (ID: 1128662)