Faculty Bibliography

BACKGROUND/UNASSIGNED:The increasing number of organ transplant recipients has led to a rise in cancer diagnoses in this population. Kidney transplant recipients, in particular, have a two-to-four-fold higher risk of developing cancer due to immunosuppressive therapy. The management of gynecologic cancers in this subset of patients presents unique challenges due to anatomical considerations, immunosuppression, and the nephrotoxicity of oncologic treatments.Case Presentation.A 44-year-old woman with a history of polycystic kidney disease underwent a bilateral nephrectomy followed by a living-related intraperitoneal renal transplant. She presented with pelvic pain and was found to have high-grade ovarian adenocarcinoma, possibly arising from endometriosis. Surgical staging included total laparoscopic hysterectomy, bilateral salpingo-oophorectomy, omentectomy, and right pelvic lymph node dissection. The patient underwent six cycles of carboplatin and paclitaxel chemotherapy while maintaining stable renal function with close monitoring of immunosuppressive drug levels. Surveillance imaging detected recurrence in the right pelvic lymph nodes, leading to secondary tumor debulking and whole pelvic radiation therapy. Despite a slight increase in creatinine, kidney function remained stable, and the patient has remained disease-free on subsequent follow-ups. CONCLUSION/UNASSIGNED:The management of ovarian cancer in kidney transplant recipients requires a multidisciplinary approach to balance oncologic control with graft preservation. Close monitoring of renal function, careful surgical planning, and tailored chemotherapy and radiation strategies are critical. More research is needed to establish standardized guidelines for managing gynecologic malignancies in transplant patients.

BACKGROUND & AIMS/OBJECTIVE:There is significant variability in the immediate post-operative and long-term management of patients undergoing per-oral endoscopic myotomy (POEM), largely stemming from the lack of high-quality evidence. We aimed to establish a consensus on several important questions on the after care of post-POEM patients through a modified Delphi process. METHODS:A steering committee developed an initial questionnaire consisting of 5 domains (33 statements): post-POEM admission/discharge, indication for immediate post-POEM esophagram, peri-procedural medications and diet resumption, clinic follow-up recommendations, and post-POEM reflux surveillance and management. A total of 34 experts participated in the 2 rounds of the Delphi process, with quantitative and qualitative data analyzed for each round to achieve consensus. RESULTS:A total of 23 statements achieved a high degree of consensus. Overall, the expert panel agreed on the following: (1) same-day discharge after POEM can be considered in select patients; (2) a single dose of prophylactic antibiotics may be as effective as a short course; (3) a modified diet can be advanced as tolerated; and (4) all patients should be followed in clinic and undergo objective testing for surveillance and management of reflux. Consensus could not be achieved on the indication of post-POEM esophagram to evaluate for leak. CONCLUSIONS:The results of this Delphi process established expert agreement on several important issues and provides practical guidance on key aspects in the care of patients following POEM.

BACKGROUND:Despite widespread use of Roux-en-Y gastric bypass (RYGB), there are no standardized limb lengths in the United States. METHODS:A multi-center retrospective cohort study was conducted from 2020 to 2023. Eligible patients who had undergone RYGB were divided into subgroups based on BP limb lengths: short (50-75 cm), intermediate (80-125 cm), and long (150-175 cm). Primary outcomes were total weight loss (TWL) and % TWL at 1 and 2 years. Secondary outcomes were post-operative BMI and % BMI change at 1 and 2 years, micronutrient deficiencies, hypothyroidism, acute kidney injury (AKI) requiring treatment, and remission in associated medical problems. Subgroups were compared using multivariate analysis. RESULTS:Two hundred twenty-eight patients received a long BP limb, 194 patients received an intermediate BP limb, while 152 patients received a short BP limb. Primary outcomes TWL and % TWL were significantly different between the groups at 1 year: TWL and % TWL were greater in patients with long BP limbs. The difference between the long and short BP limb groups increased at the 2-year mark. Patients who had long BP limbs had higher rates of DM remission (12.3% vs 11.9% 6.6%), HTN (8.8% vs 5.7% vs 7.9%), GERD symptoms (14.5% vs 9.8% vs 5.3%), and OSA (8.8% vs 7.7% vs 5.3%). Vitamin A deficiency rates were higher in the long BP limb group. CONCLUSIONS:The results suggest that longer BP limb lengths are conducive to TWL and overall treatment of obesity-related problems without severe rates of complications. Additional longer longitudinal studies are needed to assess the impact of long BP limbs on nutrition and weight loss in the long term.

BACKGROUND:Osteoporosis is a significant cause of morbidity and mortality in the aging population. Individuals with type 2 diabetes mellitus (T2D) typically have higher bone density yet also a higher rate of fractures. Blacks, meanwhile, have a lower incidence of osteoporosis compared to European Americans. Serum bicarbonate may be a risk factor for bone loss, but studies are conflicting, and little is known about this relationship in T2D or Blacks. METHODS:We examined the longitudinal relationship between serum bicarbonate and change in bone density in 300 participants with T2D in the African American-Diabetes Heart Study (AA-DHS). Serum bicarbonate was measured at baseline, and bone density was assessed using CT volumetric bone mineral density (vBMD) scans of the thoracic and lumbar vertebrae at baseline and after five years of follow-up. Multivariate linear regression models assessed associations between baseline serum bicarbonate and longitudinal change in vBMD, adjusted for multiple confounders. RESULTS:, p < 0.001), without a clear threshold effect or differences by sex. CONCLUSIONS:In this cohort of Blacks with T2D, higher baseline serum bicarbonate levels were associated with improved changes in bone density over time. Further studies are needed to determine if alkali supplementation would ameliorate loss of bone density in this population.

Respiratory tract infections (RTIs) caused by bacteria or viruses are associated with stroke severity. Recent studies have revealed an imbalance in the von Willebrand factor (VWF)-ADAMTS13 (a disintegrin and metalloproteinase with thrombospondin motifs 13) axis in patients with RTIs, including coronavirus disease 2019. We examined whether this imbalance contributes to RTI-mediated stroke severity. Wild-type (WT), Vwf-/-, or Adamts13-/- mice with respective littermate controls (Vwf+/+ or Adamts13+/+) were infected intranasally with sublethal doses of Staphylococcus aureus (on days 0, 2, and 5) or mouse-adapted severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; on day 0) and subjected to transient (30 or 45 minutes) cerebral ischemia followed by reperfusion. In S aureus-infected mice, infarct volumes were assessed on day 2 and functional outcomes on weeks 1 and 4 after reperfusion. In SARS-CoV-2-infected mice, infarct volumes and functional outcomes (Bederson score) were assessed on day 1 after reperfusion. We demonstrated that S aureus or SARS-CoV-2 RTI was accompanied by an imbalance in the VWF-ADAMTS13 axis and an increase in plasma levels of interleukin-6, C-X-C motif chemokine ligand 1, and monocyte chemoattractant protein-1, which was associated with larger infarcts and worse functional outcomes (P < .05 vs mock infection). S aureus- or SARS-CoV-2-infected Vwf-/- mice exhibited reduced infarcts and improved functional outcomes, whereas infected Adamts13-/- mice displayed greater stroke severity (P < .05 vs control). In the models of RTI preceding stroke, VWF contributes to stroke severity, whereas ADAMTS13 is protective.

BACKGROUND:Four-dimensional computed tomography is routinely used to localize parathyroid disease, with consistently excellent parathyroid gland localization rates reported. This study evaluated whether pairing 4-dimensional computed tomography results with preoperative clinical variables can accurately predict single-gland disease in primary hyperparathyroidism. METHODS:Patients with primary hyperparathyroidism who underwent both 4-dimensional computed tomography imaging and parathyroidectomy between January 2019 and September 2021 at a large academic health system were included. Patient demographics, preoperative characteristics, and peri- and postoperative data were collected. The accuracy of 4-dimensional computed tomography in correctly identifying patients with single-gland disease with and without preoperative calcium and parathyroid hormone levels was calculated. Single-gland disease was defined by intraoperative parathyroid hormone decrease >50% and a hypercellular gland on pathology. RESULTS:One hundred seventy-five patients had 4-dimensional computed tomography results suggestive of single gland disease. One hundred fifty-two patients (87%) were predicted correctly to have single-gland disease. The predictive accuracy increased when stratifying by preoperative calcium (≥10.5 mg/dL, ≥11 mg/dL, and ≥12 mg/dL) and parathyroid hormone levels (≥65 pg/mL, ≥100 pg/mL, and ≥200 pg/dL). The accuracy further increased when stratifying by age (≤50 years). Accuracy for single gland disease was 100% when combined with any of the following: (1) calcium ≥12 mg/dL, (2) parathyroid hormone ≥200 pg/dL, or (3) calcium ≥11 mg/dL in patients ≤50 years. CONCLUSION/CONCLUSIONS:Four-dimensional computed tomography alone accurately predicted single gland disease in 87% of patients with primary hyperparathyroidism. When combined with preoperative calcium, parathyroid hormone and age thresholds, predictive accuracy for single-gland disease approached 100%. Given the high likelihood of single-gland disease in these scenarios, clinicians may consider offering focused unilateral parathyroidectomy without intraoperative parathyroid hormone monitoring in selected patients.

OBJECTIVES/OBJECTIVE:Addressing minor yet significant frustrations, or "pebbles," in the workplace can reduce physician burnout, as noted by the American Medical Association. These "pebbles" are small workflow issues that are relatively easy to fix but can significantly improve the workday when resolved. This quality improvement project aimed to enhance clinician well-being in an emergency department (ED) affiliated with an academic institution through human-centered design by actively engaging clinicians to identify these "pebbles" and for a dedicated team to address them. METHODS:A task force comprised of three emergency physicians collaborating with emergency medicine leadership was established. After educating clinicians about "pebbles," clinicians were able to anonymously submit pebbles based on recall of frustrations in a baseline survey at the start of the project, as well as submit pebbles in real time by a QR code that was placed in easily noticeable areas. The task force met bimonthly to categorize, prioritize, and assign ownership of the pebbles. Progress was communicated to staff via a monthly "stop light" report. An anonymous survey assessed the impact on clinician well-being among 68 emergency clinicians within seven months of starting the project. RESULTS:Over seven months, 284 pebbles were submitted (approximately 40 per month). The feasibility of addressing pebbles was characterized by a color scale: green (easy to fix): 149 (53%); yellow (more complex): 111 (39%); and red (not feasible, "boulder"): 24 (8%). Categories of pebbles included the following: equipment/supply: 115 (40%); nursing/clinical: 86 (30%); process: 64 (23%); and information technology/technology: 19 (7%). A total of 214 pebbles (75%) were completed. Among 51 respondents (75% response rate), the self-reported impact on well-being of having pebbles addressed was as follows: extremely effective: 16 (31%); very effective: 25 (49%); moderately effective: 8 (16%); slightly effective: 2 (4%); and not effective 0 (0%). CONCLUSION/CONCLUSIONS:In addition to improving personal resilience, improving well-being in the ED involves addressing efficiency of practice. This project highlights the positive impact of resolving small, feasible issues identified by clinicians, which resulted in 80% of respondents rating the project as very to extremely effective in improving their well-being. Most pebbles were related to equipment and easily fixed, while issues involving human interactions (eg, communications between consultants and EM) were more challenging. Regular meetings and accountability facilitated progress. This approach is replicable across medical specialties and practice settings, offering a low-cost method to enhance clinician work environments and well-being.

Homocysteine is an amino acid derived from methionine which is metabolized via vitamin B₆ (pyridoxine)- and vitamin B₁₂ (cobalamin)-dependent pathways. Supplementation of B vitamins has been shown to effectively reduce plasma homocysteine levels. Previous research has also demonstrated an association between lower plasma homocysteine levels and decreased risk of myocardial infarction, stroke, and venous thromboembolism. However, whether supplementation of B vitamins is associated with risk reduction in thromboembolic events and confers clinical benefits remains inconclusive. This review examines clinical trials published over the past 29 years to assess the effects of B vitamin supplementation on thrombotic risk reduction and homocysteine metabolism. The findings from these studies are inconsistent, and the impact of B vitamins on thrombosis prevention remains uncertain. Given the conflicting evidence, further clinical and translational research is necessary to clarify the role of B vitamin supplementation in thrombosis risk reduction.