Faculty Bibliography

Curricular revision efforts have resulted in learner-centered programs that value content integration and active learning. Yet, less attention has been placed on assessment methods that are learner-centered and promote assessment for learning. The use of context rich short answer question (CR-SAQ) exams in the preclinical years of medical school was evaluated to determine if this format aligns with the criteria for assessment for learning. Medical students and preclinical faculty members were sent a survey comprised of closed and open-ended questions about their experience using CR-SAQ exams. Data were analyzed using a mixed-method design. Open-ended responses were evaluated using thematic analysis within the framework of criteria for assessment for learning. A total of 274 students (94%) and 24 faculty (75%) completed the survey. Fifty four percent of students reported preferring a CR-SAQ exam format over multiple choice questions (MCQ) format. Quantitative data and qualitative comments by students supported that CR-SAQ exams aligned with criteria for assessment for learning, including acceptability, authenticity, educational effect, and the cueing effect. Student concerns included preparation for USMLE Step 1 exam, as well as the validity and reproducibility of CR-SAQ assessments. Faculty largely agreed with the benefits of the CR-SAQ, but were concerned about feasibility, acceptability and reproducibility. The CR-SAQ exam format assessment strategy supports assessment for learning in an undergraduate medical education setting. Both benefits and drawbacks of this method are presented, however students and faculty describe a broader impact that this assessment method has on their development as a physician.

BACKGROUND:Gastrointestinal symptoms are prevalent in patients with cirrhosis. Cirrhotic patients have a known predilection to delayed gastric emptying compared to those without cirrhosis. However, the contributing factors have not been fully elucidated. Retained gastric food on esophagogastroduodenoscopy (EGD) has been used as a surrogate marker for delayed gastric emptying with reasonably high specificity. Therefore, we hypothesize that the frequency of retained gastric food contents at EGD will be higher in a cirrhotic population compared to a control population without liver disease. Additionally, we hypothesize that increased frequency of gastric food contents will be associated with increased severity of cirrhosis. AIM/OBJECTIVE:To determine the relative frequency of delayed gastric emptying among cirrhotics as compared to non-cirrhotics and to identify associated factors. METHODS:We performed a retrospective case-control study of cirrhotic subjects who underwent EGD at an academic medical center between 2000 and 2015. Three hundred sixty-four patients with confirmed cirrhosis, who underwent a total of 1044 EGDs for the indication of esophageal variceal screening or surveillance, were identified. During the same period, 519 control patients without liver disease, who underwent a total of 881 EGDs for the indication of anemia, were identified. The presence of retained food on EGD was used as a surrogate for delayed gastric emptying. The relative frequency of delayed gastric emptying among cirrhotics was compared to non-cirrhotics. Characteristics of patients with and without retained food on EGD were compared using univariable and multivariable logistic regression analysis to identify associated factors. RESULTS:0.01) were also associated with a higher likelihood of food retention on EGD. CONCLUSION/CONCLUSIONS:Cirrhotics have a higher frequency of retained food at EGD than non-cirrhotics. Decompensated cirrhosis, defined by Child-Pugh class C, is associated with a higher likelihood of delayed gastric emptying.

IDH1/2 mutations are early drivers present in diverse human cancer types arising in various tissue sites. IDH1/2 mutation is known to induce a global hypermethylator phenotype. However, the effects on DNA methylation across IDH mutant cancers and functionally different genome regions, remain unknown. We analyzed DNA methylation data from IDH1/2 mutant acute myeloid leukemia, oligodendroglioma, astrocytoma, solid papillary breast carcinoma with reverse polarity, sinonasal undifferentiated carcinoma and cholangiocarcinoma, which clustered by their embryonal origin. Hypermethylated common probes affect predominantly gene bodies while promoters in IDH1/2 mutant cancers remain unmethylated. Enhancers showed global hypermethylation, however commonly hypomethylated enhancers were associated with tissue differentiation and cell fate determination. We demonstrate that some chromosomes, chromosomal arms and chromosomal regions are more affected by IDH1/2 mutations while others remain resistant to IDH1/2 mutation induced methylation changes. Therefore IDH1/2 mutations have different methylation effect on different parts of the genome, which may be regulated by different mechanisms.

Antimicrobial-resistant (AMR) infections pose a major threat to global public health. Similar to other AMR pathogens, both historical and ongoing drug-resistant tuberculosis (TB) epidemics are characterized by transmission of a limited number of predominant Mycobacterium tuberculosis (Mtb) strains. Understanding how these predominant strains achieve sustained transmission, particularly during the critical period before they are detected via clinical or public health surveillance, can inform strategies for prevention and containment. In this study, we employ whole-genome sequence (WGS) data from TB clinical isolates collected in KwaZulu-Natal, South Africa to examine the pre-detection history of a successful strain of extensively drug-resistant (XDR) TB known as LAM4/KZN, first identified in a widely reported cluster of cases in 2005. We identify marked expansion of this strain concurrent with the onset of the generalized HIV epidemic 12 y prior to 2005, localize its geographic origin to a location in northeastern KwaZulu-Natal ∼400 km away from the site of the 2005 outbreak, and use protein structural modeling to propose a mechanism for how strain-specific rpoB mutations offset fitness costs associated with rifampin resistance in LAM4/KZN. Our findings highlight the importance of HIV coinfection, high preexisting rates of drug-resistant TB, human migration, and pathoadaptive evolution in the emergence and dispersal of this critical public health threat. We propose that integrating whole-genome sequencing into routine public health surveillance can enable the early detection and local containment of AMR pathogens before they achieve widespread dispersal.

BACKGROUND:While Medicare is a federal health insurance program, managed Medicare limits access to healthcare services to networks within states or territories. However, if a natural disaster requires evacuation, displaced patients are at risk of losing coverage for their benefits. Previous literature has discussed the quality of managed Medicare plans within Puerto Rico but has not addressed the adequacy of this coverage if residents are displaced to the continental United States. We explore Hurricane Maria's impact on a resident of Puerto Rico with chronic health problems, and the challenges he faces seeking healthcare in New York. CASE PRESENTATION/METHODS:A 59-year-old male with a history of diabetes mellitus type II, coronary artery disease, peripheral vascular disease status post right foot amputation, and end-stage kidney disease on hemodialysis was admitted in October of 2017 for chest pain and swelling of legs for 5 days. The patient had missed his last three dialysis sessions after Hurricane Maria forced him to leave Puerto Rico. In examining this patient's treatment, we observe the effect of Hurricane Maria on the medical management of Puerto Rican residents and identify challenges managed Medicare may pose to patients who cross state or territory lines. CONCLUSIONS:We employ this patient's narrative to frame a larger discussion of Puerto Rican managed Medicare and provide additional recommendations for healthcare providers. Moreover, we consider this case in the context of disaster-related continuity of care for patients with complex medical conditions or treatment regimens. To address the gaps in the care of these patients, this article proposes (1) developing system-based approaches for screening displaced patients, (2) increasing the awareness of Special Enrollment Periods related to Medicare among healthcare providers, and (3) creating policy solutions to assure access to care for patients with complex medical conditions.

BACKGROUND:Advanced tumors of the thoracic spine are difficult to treat and can lead to complex pain syndromes. Following conventional oncologic treatments, pharmacologic therapy may be insufficient to manage pain. Minimally invasive interventional procedures offer alternatives to treat malignant thoracic spinal pain. METHODS:Thirteen patients with metastatic disease and poorly controlled thoracic axial and/or radicular pain were identified via a retrospective chart review. Patients were either treated with radiation, surgery, chemotherapy, or a combination of these. Then, the patients were organized into groups based on their diagnoses, anatomical disease locations, symptoms, prior treatments, and interventional pain procedures offered. RESULTS:All cases of intercostal nerve, costotransverse junction, erector spinae plane, and paravertebral blocks resulted in pain relief without any reported complications. A patient who received a thoracic epidural injection had a complete resolution of pain when combined with radiation therapy two weeks after the injection. One patient who underwent repeat thoracic epidurals eventually had an intrathecal pump placement resulting in reduced opioid usage. Finally, one patient who received a thoracic medial branch block with a relief of thoracic axial pain reported greater pain relief with a medial branch nerve cryoablation. CONCLUSION/CONCLUSIONS:We propose a treatment algorithm to manage patients with thoracic spinal tumor-related pain. Interventional thoracic axial procedures may be safe and efficacious pain treatments for cancer patients. This article is protected by copyright. All rights reserved.