Harris, Dana M.

Background/Objectives: Leptin is a pleiotropic adipokine linking energy metabolism with innate and adaptive immunity. Its relationship with clinical severity across distinct airway disease phenotypes remains insufficiently characterized. This study examined serum leptin concentrations in adults with allergic rhinitis, non-allergic asthma, and allergic asthma associated with allergic rhinitis. Methods: This single-center retrospective observational study analyzed fully anonymized clinical and laboratory data from 88 adults: patients with allergic rhinitis (n = 31), non-allergic asthma (n = 15), or allergic asthma with allergic rhinitis (n = 22) and healthy controls (n = 20). Serum leptin was measured using a quantitative sandwich enzyme-linked immunosorbent assay. Disease severity was classified using the Allergic Rhinitis and its Impact on Asthma and Global Initiative for Asthma frameworks applicable during the study period. Statistical analyses were performed using IBM SPSS Statistics, version 26.0 (IBM Corp., Armonk, NY, USA), and available original statistical outputs were summarized using retained t statistics and two-sided p values. Results: Stage-specific mean serum leptin concentrations were heterogeneous and non-monotonic. Statistically significant relationships between leptin concentration and disease stage were reported for allergic rhinitis (t = 2.844; p = 0.008), non-allergic asthma (t = 4.240; p = 0.001), and allergic asthma with allergic rhinitis (t = 2.700; p = 0.013). In the allergic rhinitis subgroup, 64.5% of participants had normal weight, 32.3% were overweight, and 3.2% had grade II obesity; weight category was not significantly related to rhinitis stage. Conclusions: The retained analyses indicate statistically significant relationships between serum leptin concentration and clinical disease stage across the investigated airway phenotypes. However, the stage-specific descriptive means were heterogeneous and non-monotonic and therefore do not support a uniform progressive increase in leptin with increasing disease severity. Because complete model outputs and covariate-adjusted estimates were unavailable, these findings should be regarded as exploratory and require prospective validation with appropriate adjustment for adiposity and other relevant metabolic confounders.

IgG4-related disease (IgG4-RD) is a relatively recently described condition whose etiology and pathophysiology remain unclear. Histopathological features include dense lymphoplasmacytic tissue infiltration with numerous IgG4-positive plasma cells, storiform fibrosis, and obliterative phlebitis. Most individuals with IgG4-RD are asymptomatic; however, the disease can affect nearly any organ, leading to a wide range of clinical presentations. The four most common patterns are hepatopancreatobiliary disease, systemic disease, head and neck disease, and retroperitoneal disease. Diagnosis is challenging due to diverse organ involvement and is most often confirmed by biopsy. Elevated serum IgG4 concentration can support the diagnosis, though high IgG4 levels are neither highly sensitive nor specific for IgG4-RD. Immunohistochemical IgG4 staining is crucial, especially in patients without elevated serum IgG4. Differential diagnosis is necessary, as IgG4+ plasma cell infiltration is also seen in inflammatory and malignant conditions. First-line treatment consists of glucocorticoids (prednisone), although favorable outcomes have also been achieved with rituximab. Prognosis varies: the disease may resolve spontaneously or follow a relapsing–remitting course. If left untreated or undertreated, IgG4-RD can cause irreversible organ damage and even death. Finally, correlations have been made between IgG4 and different allergic reactions.

Background: Fixed drug eruption (FDE) is a non-immediate, CD8+ T cell–mediated hypersensitivity reaction characterized by well-demarcated erythematous–violaceous plaques that recur at the same site after re-exposure to the causative drug. Although NSAIDs and antibiotics are the most common triggers, various other medications may induce FDE, and genetic susceptibility has been linked to specific HLA alleles. Methods: We conducted a clinical evaluation supported by patch testing, oral drug provocation, and assessment of therapeutic alternatives to identify the causative agent and confirm delayed-type hypersensitivity. Results: We report the case of a 53-year-old woman with essential hypertension, autoimmune thyroiditis, and renal lithiasis who developed well-demarcated erythematous plaques with central vesiculation and moderate pruritus on the dorsal hand and posterior calf approximately 8 h after ingestion of a 60 mg etoricoxib tablet. Patch testing was negative, while oral challenge confirmed etoricoxib-induced FDE; celecoxib was subsequently evaluated as a potential safe alternative. Conclusions: This case underscores the importance of an integrated diagnostic approach—including careful history, clinical examination, and confirmatory testing—to accurately diagnose delayed cutaneous drug reactions and to identify safe therapeutic options for patients.

Objective: Patients with chronic pancreatitis commonly experience abdominal pain, anxiety, depression, reduced mobility, and difficulty performing daily activities or maintaining employment. These factors contribute to diminished quality-of-life and high healthcare utilization. This study aims to explore the relationship between specific quality-of-life domains among patients with chronic pancreatitis. Methods: A 55-item online survey was administered to patients with the diagnosis of chronic pancreatitis at 3 Mayo Clinic sites from December 26, 2023, to December 26, 2024. The survey included validated questions assessing demographic, clinical, and quality-of-life metrics using EuroQol 5-Dimension 5-Level instrument—a standardized assessment tool that evaluates 5 key health dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Results: Of the 298 patients with chronic pancreatitis who completed the survey, employed patients had decreased odds of reporting problems with mobility (odds ratio [OR] = 0.45, P < .05), self-care (OR = 0.26, P < .01), usual activities (OR = 0.47, P < .05), and anxiety/depression (OR = 0.41, P < .05). Similarly, older patients had decreased odds of reporting problems with self-care (OR = 0.91, P < .01), usual activities (OR = 0.96, P < .01), pain/discomfort (OR = 0.96, P < .01) and anxiety/depression (OR = 0.92, P < .01). However, Medicare patients had greater odds of reporting problems with self-care (OR = 5.54, P < .01) and pain/discomfort (OR = 2.58, P < .05). Conclusions: Chronic pancreatitis impacts multiple dimensions of quality-of-life beyond pain. The EuroQol 5-Dimension 5-Level tool enables comprehensive assessment of physical and mental health. Our findings highlight key associations between patient characteristics and quality-of-life domains, supporting the need for individualized, deficit-targeted interventions. These results also suggest a potential role for vocational rehabilitation in promoting functional recovery and enhancing overall well-being in individuals with chronic pancreatitis.

Acquired angioedema due to C1-inhibitor deficiency (AAE-C1INH) is a rare condition characterized by the localized swelling of the deeper skin layers and mucous membranes, especially the face, lips, tongue, throat, and gastrointestinal tract. AAE-C1INH is strongly associated with lymphoproliferative disorders, although it can also be linked to autoimmune conditions, solid tumors, infections, or even occur without an identifiable cause. We present the case of a 45-year-old female patient with complaints of recurrent abdominal pain, bloating, and joint swelling. Laboratory testing showed decreased C1q and C4 complement levels, and C1 esterase inhibitor levels, indicative of AAE-C1INH. Further work up confirmed a diagnosis of extranodal marginal zone lymphoma with involvement of the bone marrow and spleen. Treatment with rituximab led to resolution of angioedema symptoms and almost complete remission of underlying lymphoma. This case underscores the importance of evaluating an underlying lymphoproliferative disorder in AAE-C1INH. Therefore, the early participation of a multidisciplinary team including specialists in immunology, hematology, and oncology is necessary for appropriate management.

INTRODUCTION: The increasing prevalence of clarithromycin (CLA)-resistant Helicobacter pylori (H. pylori) strains poses a significant challenge in the management of H. pylori infections. This systematic review and meta-analysis investigates the diagnostic accuracy of polymerase chain reaction (PCR) in identifying CLA-resistant H. pylori strains in stool. METHODS: A comprehensive literature search was conducted using PubMed, Embase, and Cochrane databases from database inception to April 30, 2023. Eligible studies evaluated the effectiveness of PCR stool tests in detecting CLA-resistant H. pylori strains in adults (>18-year-old). Studies of pediatric populations, alternative methods to PCR or stool samples, and reference tests other than gastric biopsy were excluded. The bivariate random-effects model was used to pool diagnostic accuracy from the included studies. RESULTS: The analysis of 11 prospective diagnostic studies with a total of 866 patients showed a pooled sensitivity of 0.97 (95% CI: 0.9–0.99) and a pooled specificity of 0.98 (95% CI: 0.81–1.00). Subgroup analysis based on the used technique demonstrated consistent findings without notable variations. The diagnostic odds ratio was calculated at 1843.92 (95% CI: 134.28–25,321.3). The positive likelihood ratio was determined as 51.02 (95% CI: 4.61–564.5), while the negative likelihood ratio was found to be 0.03 (95% CI: 0.01–0.1). DISCUSSION: PCR testing for clarithromycin-resistant H. pylori was highly sensitive and specific across studies with proven reliability in clinical practice, particularly in outpatient settings. Their implementation offers cost-effectiveness and the potential for tailored treatment strategies, holding promise for improved patient outcomes.

Background: Urticaria is a common disease with a marked influence on quality of life. The key cell involved is the mast cell, which can be activated by a vast variety of stimuli, and the major mediator is histamine. Allergic urticaria is a disorder with a large variety of causes: food, drugs, insect venom, skin contact with allergens, and physical exercise. Buckwheat consumption has increased in European countries and the USA because it is gluten-free. It can trigger anaphylactic shock if ingested, inhaled, or handled with the hands. Five common buckwheat allergens named Fag e1 to 5 (Fag e1, 2, and 3 are considered the major allergens) and two tartary buckwheat allergens named Fag t1 and Fag t2 have been described. Method: We present the case of a patient who experienced two anaphylactic shocks and in whom the etiological factor was buckwheat. The patient presented to the Allergology department for the evaluation of two episodes of severe allergic reactions that required emergency therapy, episodes that involved the loss of consciousness and were of major severity. At each anaphylactic shock, an ambulance was requested, and emergency therapy was administered, leading to the patient’s recovery within a few hours. Diagnosis: Since each episode occurred a few minutes after eating, the diagnosis was established based on a detailed anamnesis and prick skin tests, followed by specific IgE dosages. Other foods consumed by the patient, assessed by prick skin testing and specific IgE dosages of suspected foods, were excluded as the etiological cause. Increased levels of buckwheat-specific immunoglobulin E were highlighted, thus identifying the etiological agent. The treatment of anaphylactic shock was performed urgently by the ambulance crew with adrenaline, infusion solutions, cortisone preparations, and antihistamines. Result: Following the treatment that was initiated, there was a partial remission of the lesions after a few hours. Conclusions: Buckwheat allergy is rare, but it produces symptoms that affect the skin, gastrointestinal tract, and respiratory tract, as well as anaphylaxis. In a professional environment, it can trigger allergic rhinitis, asthma, and hives. Although buckwheat allergens have been described, their clinical relevance has only been studied in a small number cases. In current practice, the only commercially available allergen is Beech e2 per the ImmunoCAP ISAC microarray. Diagnosis can be difficult in clinical practice. This reported case suggests the need for a thorough anamnesis, since buckwheat is consumed as a hidden allergen, and in Europe, it is not necessary to label foods containing this allergen.

Clostridioides difficile infection (CDI) is one of the most common and severe nosocomial infections worldwide. It can also affect healthy individuals in the community. The incidence of CDI has been on the rise globally for the past decade, necessitating a proactive approach to combat its spread; new strategies are being developed to enhance diagnostic accuracy and optimize treatment outcomes. Implementing the 2-step testing has increased diagnostic specificity, reducing the usage of CD-specific antibiotics with no concomitant increase in surgical complication rates. In 2021, the Infectious Diseases Society of America/Society for Healthcare Epidemiology of America (IDSA/SHEA) shifted its preference for initial treatment to fidaxomicin over vancomycin and metronidazole due to its lower recurrence rate. It also prioritized fidaxomicin for the treatment of recurrent CDI. There are new developments on the frontiers of fecal microbiota therapies, with RBX2660 and SER-109 approved recently by the FDA for prevention, with other microbiome-based therapies in various development and clinical trials. This review offers providers an updated and practical guide for CDI management.

Abstract Background Pancreatic cysts (PC) are increasingly detected through abdominal imaging, prompting exploration of alternatives such as endoscopic ultrasound-guided pancreatic cyst ablation (EUS-PCA) due to the risks and costs associated with surgery. This study conducts a systematic review and meta-analysis of EUS-PCA's short-term efficacy and complications for PC management. Methods A systematic review and meta-analysis were carried out on PubMed, Ovid, Cochrane, and TRIP electronic databases. The primary outcome was cyst resolution (partial and complete) and persistence on imaging 12 months after ablation. The secondary outcome was procedure-related adverse events. Results Eight studies were eligible for analysis. Complete cyst resolution on imaging 12 months after EUS ablation was 50% [95% CI 36, 63, I2 = 85.31%]. Partial cyst resolution was 27% [95% CI 15, 41, I2 = 87.07%], and cyst persistence was 17% [95% CI 11, 24, I2 = 62.11%]. The rate of complete resolution varied depending on the treatment agent (for ethanol 29% [95% CI 10, 53], lauromacrogol 51% [95% Cl 36, 67], ethanol and paclitaxel 63% [95% CI 48, 76], paclitaxel and gemcitabine 67% [95% CI 45, 83], ethanol, paclitaxel and gemcitabine 61% [95% CI 39, 80]). Post-procedure adverse events included abdominal pain in 4% [95% CI 0, 11], pancreatitis in 3% [95% CI 1, 5], and fever in 1% [95% CI 0, 3] of all patients. Conclusion The treatment of pancreatic cysts with EUS ablation results in acceptable levels of complete resolution, and low incidence of severe adverse events. The effectiveness of this treatment is further enhanced when chemoablative agents are employed.