Skin-Deep Diagnosis: Affective Bias and Zebra Retreat Complicating the Diagnosis of Systemic Sclerosis

Cognitive bias in the patient encounter: Part I. Background and significance

Cognitive bias may lead to diagnostic error in the patient encounter. There are hundreds of different cognitive biases, but certain biases are more likely to affect patient diagnosis and management. As during morbidity and mortality rounds, retrospective evaluation of a given case, with comparison to an optimal diagnosis, can pinpoint errors in judgment and decision-making. The study of cognitive bias also illuminates how we might improve the diagnostic process. In Part 1 of this series, cognitive bias is defined and placed within the background of dual process theory, emotion, heuristics, and the more neutral term judgment and decision-making bias.

Implicit racial bias among medical graduates and students by an IAT measure: a systematic review and meta-analysis

INTRODUCTION

Racial implicit bias is an unconscious response and behavior that affects interpersonal interactions and clinical decision-making.

AIMS

We attempted to meta-analyze the scores of implicit association test (IAT) to estimate pooled quantity of implicit racial bias among medical graduates and students METHODS: As far as we know, our study is the first systematic-based meta-analysis estimating the pooled score of implicit racial bias among physicians and medical students. Keywords were searched in Scopus, Web of Science, Google Scholar, PubMed, Science Direct, Cochrane, MEDLINE, Wiley online library, and ProQuest databases from 2011 since 2021. The IAT's pooled score estimates through a fixed-effect meta-analysis using STATA 15. Also, I² statistic was used to determine heterogeneity across the articles.

RESULTS

Out of 1177 articles, 29 studies entered to analysis. The pooled score of IAT among physicians and medical students was 0.28 (95% CI 0.13 to 0.43) and 0.35 (95% CI 0.03 to 0.67), respectively. The racial bias score of physician ranged from -0.12 to 0.62. While score of implicit association test for medical student ranged from -0.01 to 1.29.

CONCLUSION

Our meta-analysis revealed that there was an implicit anti-black attitude among physicians and medical students, but the size of this implicit racial bias was small. Although the level of racial bias in physicians and medical students was low, it could be reduced to the lowest level through informative programs and training in ways to control implicit attitudes.

A rare presentation of hypovolemic shock secondary to Whipple's disease

Whipple's disease is a rare, multisystem infection caused by the Gram-positive Tropheryma whippelii organism. In addition to neurological and rheumatological manifestations, this disease can result in significant gastrointestinal symptoms such as malabsorption, diarrhea, and weight loss. Given the diagnostic challenge and rare occurrence, a high index of suspicion is critical to prevent morbidity and mortality from this otherwise highly infectious disease transmitted via the fecal-oral route. We present a very rare but near-fatal case of hypovolemic shock secondary to protein-losing enteropathy and gastrointestinal bleeding from small bowel T. whippelii infection. Furthermore, the epidemiology, clinical presentation, diagnosis, and management of Whipple's disease is reviewed.

Interpretation of an Extended Autoantibody Profile in a Well-Characterized Australian Systemic Sclerosis (Scleroderma) Cohort Using Principal Components Analysis

OBJECTIVE

To determine the relationships between systemic sclerosis (SSc)-related autoantibodies, as well as their clinical associations, in a well-characterized Australian patient cohort.

METHODS

Serum from 505 Australian SSc patients were analyzed with a commercial line immunoassay (EuroLine; Euroimmun) for autoantibodies to centromere proteins CENP-A and CENP-B, RNA polymerase III (RNAP III; epitopes 11 and 155), the 90-kd nucleolar protein NOR-90, fibrillarin, Th/To, PM/Scl-75, PM/Scl-100, Ku, topoisomerase I (topo I), tripartite motif-containing protein 21/Ro 52, and platelet-derived growth factor receptor. Patient subgroups were identified by hierarchical clustering of the first 2 dimensions of a principal components analysis of quantitative autoantibody scores. Results were compared with detailed clinical data.

RESULTS

A total of 449 of the 505 patients were positive for at least 1 autoantibody by immunoblotting. Heatmap visualization of autoantibody scores, along with principal components analysis clustering, demonstrated strong, mutually exclusive relationships between CENP, RNAP III, and topo I. Five patient clusters were identified: CENP, RNAP III strong, RNAP III weak, topo I, and other. Clinical features associated with CENP, RNAP III, and topo I were consistent with previously published reports concerning limited cutaneous and diffuse cutaneous SSc. A novel finding was the statistical separation of RNAP III into 2 clusters. Patients in the RNAP III strong cluster had an increased risk of gastric antral vascular ectasia, but a lower risk of esophageal dysmotility. Patients in the other cluster were more likely to be male and to have a history of smoking and a history of malignancy, but were less likely to have telangiectasia, Raynaud's phenomenon, and joint contractures.

CONCLUSION

Five major autoantibody clusters with specific clinical and serologic associations were identified in Australian SSc patients. Subclassification and disease stratification using autoantibodies may have clinical utility, particularly in early disease.

Unexpected post-mortem diagnosis of systemic sclerosis presenting as pneumatosis intestinalis: revised diagnostic criteria and medicolegal implications

Systemic sclerosis is a challenging diagnosis for clinicians and pathologists alike due to its protean manifestations and often insidious onset, particularly in cases without significant titres of auto-antibodies. Herein we present a case of a female in her sixties who died rapidly following a clinical diagnosis of pneumatosis intestinalis and respiratory failure of unclear etiology. Recently revised clinical diagnostic criteria were applied to the clinical history and postmortem findings to reach an unexpected diagnosis of systemic sclerosis. The diagnosis of systemic sclerosis at autopsy has important medicolegal implications largely related to premature death due to delayed treatment or poor post-operative outcome. Moreover, familial clustering of this disease underscores the importance of maintaining a high index of suspicion in the postmortem setting.