Mandrekar, Jay

ABSTRACTBackground and AimsChronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is difficult to distinguish from mimicking disorders, with misdiagnosis resulting in IVIG overutilization. We evaluate a clinical‐electrophysiological model to facilitate CIDP versus mimic neuropathy prediction.MethodsUsing the European Academy of Neurology/Peripheral Nerve Society (EAN/PNS) 2021 CIDP guidelines we derived 26 clinical and 144 nerve conduction variables. The model was generated and validated utilizing total CIDP (n = 129) and mimics (n = 309); including (1) IgG4‐nodopathies; (2) POEMS (polyneuropathy–organomegaly–endocrinopathy–monoclonal protein‐skin changes); (3) anti‐myelin‐associated‐glycoprotein; (4) paraneoplastic; (5) Waldenström B‐cell lymphoma; (6) diabetic neuropathies; (7) amyloidosis; (8) Charcot–Marie–Tooth; (9) motor neuropathies/neuronopathies; and (10) idiopathic‐inflammatory‐myopathies.ResultsWe analyzed 9282 clinical and 51 408 electrophysiological data points. Univariate analysis identified 11 of 26 clinical variables with significant odds ratios. A multivariate regression model using four clinical and two electrophysiologic variables achieved 93% area‐under‐curve (95% CI 91–95): progression over 8 weeks (OR 40.66, 95% CI 5.31–311.36), absent autonomic involvement (OR 17.82, 95% CI 2.93–108.24), absent muscle atrophy (OR 16.65, 95% CI 3.27–84.73), proximal weakness (OR 3.63, 95% CI 1.58–8.33), ulnar motor conduction velocity slowing < 35.7 m/s (OR 5.21, 95% CI 2.13–12.76), and ulnar motor conduction block (OR 13.37, 95% CI 2.47–72.40). A web‐based probability calculator (https://news.mayocliniclabs.com/cidp‐calculator/) was developed, with 100% sensitivity and 68% specificity at a 92% probability threshold. Specificity improved to 93% when considering “red flags,” electrophysiologic criteria, and laboratory testing.InterpretationA probability calculator using clinical electrophysiological variables assists CIDP differentiation from mimics, with scores below 92% unlikely to have CIDP. The highest specificity is achieved by considering clinical “red flags,” electrophysiologic demyelination, and laboratory testing.

Abstract Few studies have reliable estimates on costs of informal care following hospitalization, including health care use and out-of-pocket costs for family caregivers (FCGs) and their care recipients (CR). This presentation discusses results from a Transitional Palliative Care (TPC) intervention on healthcare use and out-of-pocket spending for both FCGs and CRs. The study used data from the Technology-Enhanced TPC study, a trial comparing the TPC intervention to support FCGs of seriously ill CRs to an attention control condition. TPC FCGs received teaching, guidance, and counseling via video calls for 8 weeks following CR hospital discharge. After discharge, a research assistant called FCGs once a month for up to 6 months or CR death to collect healthcare utilization (e.g. outpatient, emergency department, and hospital), out-of-pocket healthcare spending (e.g. deductibles and coinsurance), and health-related travel costs (e.g., transportation, lodging, food) for FCGs and CRs. Incidence rate ratios (IRR) were estimated using negative binomial regressions. The study included 282 FCG-CR dyads across 3 US states. TPC reduced nights in the hospital for CR (IRR = 0.75; 95% CI = 0.56 – 0. 99). Total out-of-pocket spending was not significantly different for TPC versus control; however, TPC dyads reported lower lodging costs (IRR = 0.71; 95% CI = 0.56-0.89). Across groups, mean out-of-pocket spending for dyads was $1401.85, with healthcare payments contributing $1048.58 and transportation expenses contributing $136.79. This study contributes to evidence that palliative care interventions reduce unnecessary hospitalization for seriously ill patients, yet the financial costs to caregivers remain high.

Abstract Recruiting family caregivers to participate in research, especially caregivers of people with severe or life limiting illnesses transitioning from hospital to home, is challenging. Traditional approaches for recruitment, including recruitment done on site at clinics or hospitals, became impracticable during the COVID-19 pandemic, leading to shifts toward virtual or remote recruitment and consent. In this presentation, Dr. Gustavson will compare the success of these two methodological approaches, in-person and remote recruitment and consent, used in the Technology-Enhanced Transitional Palliative Care (TPC) study. She found that the rate of recruitment and consent done in-person was 28% and the rate of remote recruitment and consent was 23%. Those recruited and consented remotely were more likely to be younger, white, have greater than high school education, and were children of or had another non-spousal relationship to the care recipient. She discusses the limitations and benefits of each recruitment modality, including the impact on representativeness of the study sample.

Abstract In the research literature and amongst grant reviewers, there are persistent questions about whether internet connectivity challenges, especially in rural populations, will limit the potential for virtual or decentralized clinical trials to improve participation of underrepresented groups. In clinical practice, e-health and telehealth advancements have been touted as potential models of care to address health disparities associated with access to care, but without reliable internet connectivity, these disparities may perpetuate or even widen. In this presentation Dr. Holland examines the prevalence of connectivity problems during the Technology-Enhanced Transitional Palliative Care (TPC) study, a virtual clinical trial across three Midwestern states, and provides guidance on the challenges faced. Data are from structured notes from nurse interventionists who documented any connectivity issues in the study’s electronic health record. Of the 1003 visits reviewed, only 11% of visits (115/1003) contained a documented problem with internet connectivity. None of the participants withdrew from the trial due to problems with their internet connections. The findings support the effective use of virtual visits in research involving participants living in rural locations. Virtual randomized controlled trials provide a strategy that enables participation for rural individuals who may not otherwise have access to clinical trials conducted in-person in urban settings. Utilizing internet access to connect with and support people who live in rural areas is critically needed to advance clinical research.

Abstract In this presentation, Dr. Griffin will describe the Technology-Enhanced Transitional Palliative Care (TPC) study, a randomized controlled trial testing the efficacy and cost-effectiveness of an intervention to address FCGs’ unmet needs in order to improve their health and well-being. Nurse interventionists use video visits to teach, guide and counsel FCGs in rural areas caring for someone receiving palliative care and transitioning form hospital to home. In addition to providing background on the importance of addressing unmet family caregiver needs during care transitions for patients receiving palliative care, she will describe the study design, sample, intervention and control group procedures, including the use of video visits, and outcomes assessed. This presentation will provide necessary context for the remaining presentations.

ABSTRACTBackgroundAn estimated one‐third of cancer survivors suffer from post‐traumatic stress (PTS) symptoms. PTS is associated with high levels of cancer distress, anxiety, and depression. Few evidence‐based treatments are available for PTS. Accelerated Resolution Therapy (ART) is a form of trauma‐focused psychological therapy that has been found to be both safe and effective at alleviating post‐traumatic stress symptoms, psychological distress, anxiety and depressive symptoms in non‐cancer populations.MethodsThe purpose of this single arm, pilot study was to examine the preliminary efficacy of ART for alleviating post‐traumatic stress symptoms, cancer distress, depressive symptoms and anxiety among cancer survivors, as well as to evaluate baseline characteristics of persons most likely to respond to ART. Participants were provided with five ART sessions and outcome variables were assessed at enrollment, immediately following ART, and 30 days post ART. Paired t‐tests were used to examine differences between scores at each time point. Associations between the PCL‐5 score from baseline to post 30‐day visit were assessed and other variables were examined using univariate linear regression.ResultsIn a sample of 20 cancer survivors, statistically significant decreases in PTS symptoms (p < 0.0001), cancer distress (p < 0.0001), anxiety (p = 0.0002), and depression (p < 0.0001) from pre to post intervention were present. These improvements remained 30 days post‐intervention. Higher baseline PCL‐5 scores, as well as higher scores on two subscales of the cancer distress measure were associated with response to treatment.ConclusionsFindings suggest that ART is an effective therapeutic intervention for reducing PTS symptoms and cancer distress among cancer survivors.

ABSTRACT Background Inclusion body myositis (IBM) is the most prevalent muscle disease in adults for which no current treatment exists. The pathogenesis of IBM remains poorly defined. In this study, we aimed to explore the interplay between inflammation and mitochondrial dysfunction in IBM. Methods The study population consisted of 38 IBM patients and 22 age‐ and sex‐matched controls without a myopathy. Mean age was 62.9 years (SD = 9) in IBM group and 59.7 (10) in controls. Bulk RNA sequencing, Meso Scale Discovery electrochemiluminescence (ECL), western blotting, histochemistry and immunohistochemistry were performed on frozen muscle samples from the study participants. Results We demonstrated activation of the NLRP3 inflammasome in IBM muscle samples, with the NLRP3 inflammasome being the most upregulated pathway on RNA sequencing, along with increased expression of NLRP3 and ASC proteins in IBM group. NLRP3 RNA levels most strongly correlated with TLR7 (correlation coefficient ρ = 0.91) and complement activation‐related genes, and inversely correlated with several mitochondria‐related genes among others. On muscle histopathology, there was increased NRLP3 immunoreactivity in both inflammatory cells and muscle fibres. Mitophagy is critical for removing damaged mitochondria and preventing the formation of a vicious cycle of mitochondrial dysfunction—NLRP3 inflammasome activation. Herein, we showed altered mitophagy, as witnessed by the elevated levels of p‐S65‐Ubiquitin, a mitophagy marker, in muscle lysates from IBM patients compared to controls (median of 114.3 vs. 81.25 ECL units, p = 0.005). The p‐S65‐Ubiquitin levels were most significantly elevated in IBM males compared to male controls (136 vs. 83.5 ECL units; p = 0.013), whereas IBM females had milder nonsignificant elevation compared to female controls (97.25 vs. 69 ECL units, p = 0.31). On muscle histopathology, p‐S65‐Ubiquitin aggregates accumulated in muscle fibres that were mostly Type 2 and devoid of cytochrome‐c‐oxidase reactivity. NLRP3 RNA levels correlated with p‐S65‐Ubiquitin levels in both sexes (males: ρ = 0.48, females: ρ = 0.54) but with loss of muscle strength, as reflected by the manual motor test score, only in males (males: ρ = 0.62, females: ρ = −0.14). Lastly, we identified sex‐specific molecular pathways in IBM. Females had upregulation of pathways related to response to stress, which could conceivably offset some of the pathomechanisms of IBM, while males had upregulation of pathways related to cell adhesion and migration. Conclusions There is activation of the NLRP3 inflammasome in IBM, along with altered mitophagy, particularly in males, which is of potential therapeutic significance. These findings suggest sex‐specific mechanisms in IBM that warrant further investigation.

Abstract Vasculitic neuropathy is caused by inflammatory destruction of nerve blood vessels resulting in nerve ischaemia. Nerve vasculitis can be divided into two categories based on vessel size: large-arteriole vasculitis (≥75 µm) and microvasculitis (&lt;75 µm). Herein, we characterize the clinical features of nerve large-arteriole vasculitis in comparison to nerve microvasculitis. This is a retrospective cohort study of patients evaluated and biopsied at Mayo sites between 2001 and 2020. We collected clinical and histopathological data from patients whose nerve biopsies were either diagnostic or highly suggestive of nerve vasculitis. Two hundred and seventy-eight cases were identified: 125 cases of large-arteriole vasculitis and 153 cases of microvasculitis. Nerve large-arteriole vasculitis presented with a more acute (50.4% versus 26.8%) versus chronic onset (33.6% versus 57.5%) than nerve microvasculitis (P = 0.0001). Nerve microvasculitis had longer mean time to diagnosis (10.5 versus 4.3 months; P &lt; 0.0001) and longer time to plateau (8.9 versus 3.5 months; P &lt; 0.0001). Nerve large-arteriole vasculitis typically presented as distal asymmetric polyneuropathy (48.0%), whereas nerve microvasculitis typically presented as radiculoplexus neuropathy/polyradiculoneuropathy (more proximal involvement of shoulder and thigh) (43.8%) (P &lt; 0.0001). Systemic autoimmune disease was more common in nerve large-arteriole vasculitis (70.4% versus 22.9%, odds ratio, 8.0; 95% confidence interval, 4.7–13.7; P &lt; 0.0001). Nerve microvasculitis was significantly related to non-systemic vasculitis (71% versus 23%, odds ratio, 7.9; 95% confidence interval, 4.6–13.6; P &lt; 0.0001). Nerve microvasculitis had more autonomic involvement (24.2% versus 7.2%, odds ratio, 4.1; 95% confidence interval, 1.9–8.9; P = 0.0002). Nerve large-arteriole vasculitis and nerve microvasculitis have different but overlapping clinical features. Nerve large-arteriole vasculitis usually presents with acute onset, distal asymmetric polyneuropathy, associated with other autoimmune diseases and systemic involvement. In contrast, nerve microvasculitis usually presents with a subacute/chronic onset, as radiculoplexus neuropathy/polyradiculopathy (distal and proximal pattern) with autonomic involvement, and is more often a form of non-systemic vasculitis.

Background: Controversy exists around the optimal timing of resection of nevus sebaceous (NS). The authors aim to determine optimal timing of NS resection and identify predictors of surgical outcomes and secondary intralesional neoplasms. Methods: Retrospective chart review of all patients with biopsy-proven NS diagnosis treated at the authors' institution between 1987 and 2024. Results: A total of 632 patients (317 females) underwent biopsy at a median age of 17 (interquartile range 11.7–36.9) years. Benign secondary intralesional neoplasms were found in 67 (10.6%) patients, with syringocystadenoma papilliferum being the most common. Malignant secondary intralesional neoplasms were diagnosed in 62 (9.8%) patients, with basal cell carcinoma being the most common. The incidence of secondary intralesional neoplasms was 3.9%, 24.4%, 36.05%, and 54%, in patients aged 0 to 20, 20 to 40, 40 to 60, and 60 to 80 years, respectively (P<0.001). Age and NS area were associated with an increased risk of developing benign and malignant intralesional neoplasms (P=0.01). Younger patients were more likely to need general anesthesia for excision (median age 10.42 versus 17 years, P<0.001). Surgical complications occurred in 10 cases, and 6 patients required unanticipated revision surgery. The risk of developing secondary intralesional neoplasms was similar across different NS anatomic regions (log-rank, P=0.09). Conclusion: Surgical excision of NS is safe and has an acceptable risk profile. The findings of this study support our historic practice of NS excision before puberty (before the accelerated growth phase) to reduce the risk of developing secondary intralesional neoplasms.

ABSTRACT The definition of the microbiology of pleural space infection has been challenging due to the poor yield of conventional culture. Here, the results of a 16S ribosomal RNA gene PCR/sequencing assay performed on pleural fluid in routine clinical practice between August 2020 and January 2023 were evaluated. Amplified 16S rRNA gene DNA was submitted to Sanger sequencing and/or next-generation sequencing or results were reported as negative, depending on PCR crossing threshold value. In all, 496 pleural fluids were tested at Mayo Clinic Laboratories, with 227 positive results, including 57 from Mayo Clinic patients. Among the 57 Mayo Clinic patients, pleural space infection was community acquired in 48 (84%); Fusobacterium nucleatum group and/or Streptococcus intermedius were detected in 31/57 (54%) cases [including 28/48 (58%) community-acquired cases], with additional facultative and/or anaerobic species also found in various combinations in 17/31 (55%). Results of this study suggest that the most frequent microorganism profile involved in community-acquired pleural space infection may be a combination of F. nucleatum group and/or S. intermedius , with or without other normal microbiota. IMPORTANCE We describe here the most frequent microorganisms detected in community-acquired pleural space infection using a clinically performed sequencing-based assay. We found that the most common detection was the Fusobacterium nucleatum group and/or Streptococcus intermedius , with or without other normal microbiota. We propose the term e-FuSion (effusion with Fusobacterium nucleatum group, Streptococcus intermedius , and other oral normal microbiota) for this entity.