The value of autopsies in the era of high-tech medicine: discrepant findings persist

Evaluation of ChatGPT-Generated Differential Diagnosis for Common Diseases With Atypical Presentation: Descriptive Research

Background

The persistence of diagnostic errors, despite advances in medical knowledge and diagnostics, highlights the importance of understanding atypical disease presentations and their contribution to mortality and morbidity. Artificial intelligence (AI), particularly generative pre-trained transformers like GPT-4, holds promise for improving diagnostic accuracy, but requires further exploration in handling atypical presentations.

Objective

This study aimed to assess the diagnostic accuracy of ChatGPT in generating differential diagnoses for atypical presentations of common diseases, with a focus on the model's reliance on patient history during the diagnostic process.

Methods

We used 25 clinical vignettes from the Journal of Generalist Medicine characterizing atypical manifestations of common diseases. Two general medicine physicians categorized the cases based on atypicality. ChatGPT was then used to generate differential diagnoses based on the clinical information provided. The concordance between AI-generated and final diagnoses was measured, with a focus on the top-ranked disease (top 1) and the top 5 differential diagnoses (top 5).

Results

ChatGPT's diagnostic accuracy decreased with an increase in atypical presentation. For category 1 (C1) cases, the concordance rates were 17% (n=1) for the top 1 and 67% (n=4) for the top 5. Categories 3 (C3) and 4 (C4) showed a 0% concordance for top 1 and markedly lower rates for the top 5, indicating difficulties in handling highly atypical cases. The χ2 test revealed no significant difference in the top 1 differential diagnosis accuracy between less atypical (C1+C2) and more atypical (C3+C4) groups (χ²1=2.07; n=25; P=.13). However, a significant difference was found in the top 5 analyses, with less atypical cases showing higher accuracy (χ²1=4.01; n=25; P=.048).

Conclusions

ChatGPT-4 demonstrates potential as an auxiliary tool for diagnosing typical and mildly atypical presentations of common diseases. However, its performance declines with greater atypicality. The study findings underscore the need for AI systems to encompass a broader range of linguistic capabilities, cultural understanding, and diverse clinical scenarios to improve diagnostic utility in real-world settings.

Importance of Patient History in Artificial Intelligence-Assisted Medical Diagnosis: Comparison Study

Background

Medical history contributes approximately 80% to a diagnosis, although physical examinations and laboratory investigations increase a physician's confidence in the medical diagnosis. The concept of artificial intelligence (AI) was first proposed more than 70 years ago. Recently, its role in various fields of medicine has grown remarkably. However, no studies have evaluated the importance of patient history in AI-assisted medical diagnosis.

Objective

This study explored the contribution of patient history to AI-assisted medical diagnoses and assessed the accuracy of ChatGPT in reaching a clinical diagnosis based on the medical history provided.

Methods

Using clinical vignettes of 30 cases identified in The BMJ, we evaluated the accuracy of diagnoses generated by ChatGPT. We compared the diagnoses made by ChatGPT based solely on medical history with the correct diagnoses. We also compared the diagnoses made by ChatGPT after incorporating additional physical examination findings and laboratory data alongside history with the correct diagnoses.

Results

ChatGPT accurately diagnosed 76.6% (23/30) of the cases with only the medical history, consistent with previous research targeting physicians. We also found that this rate was 93.3% (28/30) when additional information was included.

Conclusions

Although adding additional information improves diagnostic accuracy, patient history remains a significant factor in AI-assisted medical diagnosis. Thus, when using AI in medical diagnosis, it is crucial to include pertinent and correct patient histories for an accurate diagnosis. Our findings emphasize the continued significance of patient history in clinical diagnoses in this age and highlight the need for its integration into AI-assisted medical diagnosis systems.

Efficacy of postmortem CT and tissue sampling in establishing the cause of death in clinical practice: a prospective observational study

AIMS

The aim of this study is to evaluate whether agreement with autopsy-determined cause of death (COD) increases by use of postmortem CT (PMCT) or PMCT in combination with postmortem sampling (PMS), when compared with clinical assessment only.

METHODS

This prospective observational study included deceased patients from the intensive care unit and internal medicine wards between October 2013 and August 2017. The primary outcome was percentage agreement on COD between the reference standard (autopsy) and the alternative postmortem examinations (clinical assessment vs PMCT or PMCT+PMS). In addition, the COD of patient groups with and without conventional autopsy were compared with respect to involved organ systems and pathologies.

RESULTS

Of 730 eligible cases, 144 could be included for analysis: 63 underwent PCMT without autopsy and 81 underwent both PMCT and autopsy. Agreement with autopsy-determined COD was significantly higher for both PMCT with PMS (42/57, 74%), and PMCT alone (53/81, 65%) than for clinical assessment (40/81, 51%; p=0.007 and p=0.03, respectively). The difference in agreement between PMCT with PMS and PMCT alone was not significant (p=0.13). The group with autopsy had a significantly higher prevalence of circulatory system involvement and perfusion disorders, and a lower prevalence of pulmonary system involvement.

CONCLUSION

PMCT and PMS confer additional diagnostic value in establishing the COD. Shortcomings in detecting vascular occlusions and perfusion disorders and susceptibility to pulmonary postmortem changes could in future be improved by additional techniques. Both PMCT and PMS are feasible in clinical practice and an alternative when autopsy cannot be performed.

Cause of death and the autopsy rate in an elderly population

Autopsy rates are declining, while major discrepancies between autopsies and clinical diagnoses remain. Still, little is known about the impact of suspected underlying diseases, for example, a diagnosis of cancer, on the autopsy rate. The aim of this study was to investigate the relation between the clinical cause of death, a history of cancer, and the medical autopsy rate using data from the Netherlands Cohort Study on Diet and Cancer (NLCS), a large prospective cohort study with a long follow-up. The NLCS is a prospective study initiated in 1986 and includes 120,852 persons (58,279 males and 62,573 females), 55-69 years of age at the time of enrollment. The NLCS was linked with the Dutch Nationwide Pathology Databank (PALGA), the Dutch Population Register (GBA), the Netherlands Cancer Registry, and the causes of death registry (Statistics Netherlands). If applicable, the 95% confidence intervals were calculated. During the follow-up of the NLCS, 59,760 deaths were recorded by linkage with the GBA from 1991 until 2009. Of these, a medical autopsy was performed on 3736 deceased according to linkage with PALGA, resulting in an overall autopsy rate of 6.3%. Major variations in the autopsy rate were observed according to the cause of death. The autopsy rate increased according to the number of contributing causes of death. Lastly, a diagnosis of cancer affected the autopsy rate. The clinical cause of death and a history of cancer both influenced the medical autopsy rate in a large national cohort. The insight this study provides may help clinicians and pathologists counteracting the further downfall of the medical autopsy.

Concordance of Solid Organ Biopsy Diagnoses With Hospital Autopsy and the Contribution of Biopsies to Death

Biopsies of the liver, lung, and kidney are performed for many indications, including organ dysfunction, mass lesions, and allograft monitoring. The diagnosis depends on the sample, which may or may not be representative of the lesion or pathology in question. Further, biopsies are not without risk of complications. Autopsies are a resource for assessing the accuracy of biopsy diagnoses and evaluating possible complications. Herein, we aimed to compare liver, lung, and kidney biopsy diagnoses with those from autopsies conducted soon after the procedure and to assess the contribution of biopsy to mortality. A 28-year search of our database identified 147 patients who were autopsied after dying within 30 days of a liver, lung, or kidney biopsy. The concordance of the biopsy diagnosis with the autopsy findings was determined. Finally, medical records were reviewed to determine the likelihood that a biopsy contributed to the patient's death. The contribution of the biopsy to death was categorized as "unlikely," "possible," or "probable." Overall concordance between biopsy and autopsy diagnoses was 87% (128/147), including 95% (87/92), 71% (32/45), and 90% (9/10) for liver, lung, and kidney biopsies, respectively. Concordance was lower for biopsies of suspected neoplasms versus non-neoplastic diseases. Lung biopsy concordance was higher for wedge biopsy versus needle or forceps biopsy. A biopsy was determined to at least "possibly" contribute to death in 23 cases (16%). In conclusion, an autopsy is an important tool to validate liver, lung, or kidney biopsy diagnoses. Confirmation of biopsy diagnoses via post-mortem examination may be particularly valuable when patients die soon after the biopsy procedure. Furthermore, an autopsy is especially useful when patients die soon after a biopsy in order to determine what role, if any, the procedure played in their deaths. Though biopsy complications are uncommon, a biopsy may still contribute to or precipitate death in a small number of patients.

The invisible body work of 'last responders' - ethical and social issues faced by the pathologists in the Global South

This paper utilises empirical data to explore the value of 'body work' performed by last responders charged with the duty of dead body management, with a focus on the Global South. While frontline staff work to save lives, little is known about the experiences and roles of those who care for the dead in global health in times of crises and even during normal times. This paper discusses ethical and socio-cultural challenges pathologists face in 'working on the bodies of others' while conducting any form of post-mortem procedures - necessary for ascertaining and recording the causes of death. Identifying and reporting the cause of death have significant public health benefits and provide closure for bereaved families. Despite the foregoing, the pathology field does not attract funding from governments or donors, and it is overlooked compared to other disciplines. Autopsy procedure bears social stigma - as it is associated with body mutilation and therefore disrespecting the dead; certain cultural beliefs or taboos about impurity and death persist, further raising some social and ethical tensions. As a result, the dearth of autopsy procedures contributes to the cause of death uncertainty in global health.

When is a postmortem examination carried out? A retrospective analysis of all Swedish deaths 1999-2018

The objective of this study was to assess who is merited an autopsy in Sweden. Data from the Swedish cause of death (COD) registry over a period of 20 years was retrieved and analysed. A multinominal logistic regression analysis was performed to identify the variables that were most strongly associated with the performance of a clinical or forensic autopsy (CA/FA).A definite COD, i.e. a COD based on autopsy findings, was registered in 12.6% of all deceased during the investigated period. In the remaining cases, the COD was presumed by the clinicians. Being male, born in the Nordic region, dying in a private residence, and unnatural death were most strongly associated with the performance of CA/FA. In contrast, being female, dying from dementia, dying at a nursing home, being born outside of Europe, or living in a small city or rural area seldom led to the performance of CA/FA.The above is certainly surprising as an autopsy provides an opportunity to investigate the cause of death, validate clinical diagnoses, detect unexpected aberrations, audit health care, and provide feedback to clinicians to facilitate their continuing education.

Discrepancies Between Clinical and Anatomic Causes of Death in Acute Invasive Fungal Sinusitis

CONTEXT.—

Acute invasive fungal sinusitis (AIFS) can be challenging to diagnose because of its varied clinical presentation.

OBJECTIVES.—

To evaluate the discrepancies between clinical and autopsy diagnoses in patients with histologic evidence of AIFS at a tertiary care center.

DESIGN.—

Autopsy cases with a pathologic autopsy diagnosis of AIFS from the past 20 years at a tertiary hospital were evaluated for clinicopathologic features. Modified Goldman classification was used to classify discrepant cases. Clinical history was also reviewed.

RESULTS.—

Of 7071 institutional autopsy cases during 20 years, 9 met inclusion criteria and demonstrated AIFS at autopsy. Angioinvasive fungal elements were histologically identified in all cases, with multiorgan involvement in most cases (6 of 9; 67%). Major clinicopathologic discrepancies were identified in 6 cases (67%).

CONCLUSIONS.—

AIFS is an uncommon diagnosis rendered at autopsy. There is a subset of cases that demonstrate discrepancy between the clinical impression and pathologic autopsy diagnosis. Antemortem diagnosis of AIFS can be challenging, especially in cases without prototypical clinical symptoms and positive fungal cultures. At autopsy, there was multiorgan involvement, supporting extensive tissue sampling to evaluate for AIFS, even in the setting of negative fungal cultures or lack of classic symptoms. These findings highlight the importance of the pathologist's role at autopsy in the definitive diagnosis of AIFS, especially in clinically equivocal cases.

[Comparison of the final clinical and autopsy detected diagnoses in sepsis]

With sepsis, more than a third of patients die, while the immediate causes of death may remain unknown. Autopsy largely helps to establish them.

OBJECTIVE

Identification of discrepancies in the final clinical and autopsy detected diagnoses in patients with sepsis who died in the surgical intensive care unit.

MATERIAL AND METHODS

107 cases of patients with sepsis who died in the Department of Surgical Resuscitation of the Republican Scientific Center for Emergency Medical Care in 2020-2021 were studied. Autopsy was performed in 60 (56%) of the deceased. The autopsy was performed within 24 hours after the death was pronounced. The final clinical and pathoanatomic diagnoses were compared in accordance with the International Goldman System and the Russian Classification of categories of diagnosis discrepancies.

RESULTS

As a result of autopsies, 3 (5%) of the deceased had a discrepancy in the diagnoses of class I and 14 (23%) - class II according to the International Goldman System. During his lifetime, diseases or their complications were not recognized in 17 (28%) cases, mainly acute myocardial infarction of type 2 (3 cases) and liver abscesses (3 cases).

CONCLUSION

A pathoanatomic autopsy is a modern and important diagnostic tool that can clarify the causes of death.

Diagnostic Error in the Critically Ill: A Hidden Epidemic?

Epidemiologic studies of diagnostic error in the intensive care unit (ICU) consist mostly of descriptive autopsy series. In these studies, rates of diagnostic errors are approximately 5% to 10%. Recently validated methods for retrospectively measuring error have expanded our understanding of the scope of the problem. These alternative measurement strategies have yielded similar estimates for the frequency of diagnostic error in the ICU. Although there is a fair understanding of the frequency of errors, further research is needed to better define the risk factors for diagnostic error in the ICU.

Spectrum of Renal Lesions on Autopsy: Experience of a Tertiary Level Institute Based on Retrospective Histopathological Analysis

INTRODUCTION

Last few decades have seen a remarkable increase in the elderly population. Aging is an established risk factor for chronic kidney diseases associated with increased mortality and morbidity. The frequency and spectrum of renal pathology on autopsy specimen is not well documented and is often overlooked by physicians as well as forensic pathologists.

AIM

The present study aims to find out the prevalence and pattern of various types of renal pathologies, based on the histopathological analysis of renal tissue where autopsies were performed whether related or unrelated to renal diseases.

MATERIAL AND METHODS

This retrospective study of six years consisted of 557 autopsies. The bits of 417 samples of kidney tissue/whole kidney, retrieved at the time of autopsy were received, processed, and examined.

RESULTS

The male to female ratio approximately was 2:1, and 83.69% of cases were in 11-50 years age groups. Among the 159 cases having definitive renal findings, the commonest pathologies were seen in tubules and interstitial tissues (58.49% cases), followed by 38.36% cases with involvement of all components of renal tissues. There were four cases of isolated vascular changes and one case having Hodgkin's lymphoma. The series had 12 cases of renal tuberculosis.

CONCLUSIONS

The study highlights the various lesions of kidney found in renal tissue obtained on autopsy. The physician as well as forensic pathologists must be aware of the high prevalence and wide spectrum of possible pathologies in the kidney. The focus should be to develop more efficacious diagnostic methods for timely intervention.

Ultrasound in legal medicine-a missed opportunity or simply too late? A narrative review of ultrasonic applications in forensic contexts

Objectives

Conventional autopsies remain the gold standard of postmortem healthcare quality assurance and help gathering extended knowledge on diseases. In answer to constantly declining autopsy rates non- or minimally invasive autopsy methods were introduced. Ultrasound is a well-established tool for imaging commonly used in clinical practice. This narrative review aims to summarize the current literature regarding the feasibility and validity of ultrasound in a forensic context.

Material and methods

A PubMed database search was carried out. Abstracts were scanned for pre-defined ex- and inclusion criteria, followed by a snowball search procedure applied to the primarily included articles.

Results

Forty-five publications met our inclusion criteria. The selected articles concern the feasibility of ultrasound in pre- or postmortem settings, forensic age estimation, and minimally invasive approaches. For imaging, ultrasound was deemed a reliable tool for the examination of epiphyses und superficial wounds, with limitations regarding internal organs and image quality due to postmortem changes. Ultrasound-guided minimally invasive approaches yielded higher success rates for adequate tissue sampling. Many investigations were carried out in low- and middle-income countries focusing on infectious diseases.

Conclusion

Ultrasound seems a promising but underutilized imaging tool in legal medicine to date. Promising approaches on its feasibility have been conducted. Especially for minimally invasive methods, ultrasound offered significant improvements on qualified biopsy sampling and thus appropriate diagnostics. Moreover, ultrasonic evaluation of epiphyses for age estimation offered valuable results. Nevertheless, further assessment of ultrasonic feasibility in forensic contexts is needed.

Histopathology at autopsy: why bother?

AIMS

The frequency of histopathological sampling at autopsy varies, even though inadequate sampling may limit the value of autopsy reports. This study aims to investigate the contribution of histopathology at autopsy in a major teaching hospital.

METHODS AND RESULTS

A total of 532 coronial autopsy reports from Manchester Royal Infirmary were analysed retrospectively. Gross and microscopic diagnoses were compared and classified as concordant, discordant, histology needed (i.e. indeterminate or unremarkable gross findings) or autolysed. Revisions made to the cause of death following histopathology were categorised as: altered direct cause of death, altered indirect cause of death, concordant with supportive information, irrelevant or inconclusive. The study was limited to brain, heart, kidney, liver, lung and spleen. Histopathology had been requested in 141 cases (27%), which were further analysed. The greatest discordance between gross and microscopic findings was observed in the lung (11.6%). The organs most frequently requiring histopathology to provide a diagnosis were the kidney and lung, at 52.8 and 28.2%, respectively. Alterations were made to the direct cause of death in 45% of cases where histopathology was taken; it provided additional or supportive information in a further 38%. Diagnoses of primary malignancy had a sensitivity of 74% [confidence interval (CI) = 0.59-0.86] and bronchopneumonia had a sensitivity of 45% (CI = 0.29-0.62).

CONCLUSION

Histopathology has a major impact on the interpretation of organ pathology and determining a cause of death at autopsy.

Comparison of antemortem clinical diagnosis and post-mortem findings in intensive care unit patients

Autopsy is an important quality assurance indicator and a tool to advance medical knowledge. This study aims to compare the premortem clinical and postmortem pathology findings in patients who died in the Intensive Care Unit (ICU), to analyze if there are any discrepancies between them, and to compare the results to two similar studies performed in our institution in 2004 and 2007. Between January 1, 2016, and December 31, 2018, 888 patients died in the ICU and 473 underwent post-mortem examination (PME) of whom 437 were included in the present study. Autopsies revealed discrepancies between clinical diagnosis and pathologic findings according to in 101 cases (23.1%) according to Goldman classification. Forty-eight major discrepancies (class I and class II) were identified in 44 cases and the most frequent identified discrepancies were pulmonary embolism (3/12) as class I and malignancies (13/35) as class II. They were more frequent in patients hospitalized for less than 10 days then in the group with more than 10 days of hospitalization (13.8% vs 4.5%; p = 0.002). No statistical difference has been noticed concerning age, gender, and ICU stay. We observed an increase of performed autopsies and a total discrepancy rate similar to the studies performed in the same institution in 2004 (22.5%) and 2007 (21%). In conclusion, discrepancies between clinical and PME diagnoses persist despite the medical progress. Secondly, the autopsy after a short hospital stay may reveal unexpected findings whose diagnosis is challenging even if it may be suspected by the intensivist.

Overview of Pathologic Findings of Vaping in the Context of an Autopsy Patient With Chronic Injury

CONTEXT.—

Electronic cigarettes are handheld devices that heat an inner liquid containing chemicals to be aerosolized and inhaled, and have become a popular alternative to conventional cigarettes. Their use, termed vaping, has been linked to severe injury, with 2711 cases of associated lung injury and 60 deaths reported to the Centers for Disease Control and Prevention at the time of writing. Published case reports and series have emerged detailing clinical and imaging characteristics of vaping-induced lung injury. However, the pathologic characteristics of these induced injuries are still being established, particularly findings occurring over time.

OBJECTIVE.—

To illustrate the autopsy findings of an older patient who died of vaping-induced injury after prolonged symptomology and to provide a review of the most recent literature regarding the basic science, epidemiology, clinical presentation, imaging characteristics, and pathology of vaping-induced lung injury.

DATA SOURCES.—

Autopsy case and peer-reviewed literature.

CONCLUSIONS.—

Vaping-induced lung injury has emerged as a public health issue, and this case represents a rare opportunity to evaluate this issue at autopsy. Most commonly, the injury has been attributed to tetrahydrocannabinol product use as opposed to nicotine. This case demonstrates that as today's young and relatively healthy "vapers" grow older and develop the comorbidities that come with advanced age, there is serious risk of chronic lung damage from vaping that could result in death. Further observations and studies, particularly autopsy evidence, are clearly important to understand the possible outcomes.

Clinical diagnoses vs. autopsy findings in early deceased septic patients in the intensive care: a retrospective cohort study

Early death in sepsis occurs frequently; however, specific causes are largely unknown. An autopsy can contribute to ascertain causes of death. The objective of the study was to determine discrepancies in clinical diagnosis and postmortem findings in septic intensive care unit (ICU) patients deceased within 48 h after ICU admission. All septic ICU patients who deceased within 48 h after ICU admission were identified and included. Four intensivists determined the clinical cause of death by medical record review. An autopsy was performed within 24 h of death. Clinical diagnosis and postmortem findings were compared and classified as autopsy-identified missed clinical diagnoses and autopsy-refuted diagnoses. Class I and II missed major diagnoses using the Goldman criteria were scored. Between 2012 and 2017, 1107 septic patients were admitted to ICU. Of these, 344 patients (31%) died, of which 97 patients (28%) deceased within 48 h. In 32 (33%) early deceased patients, an autopsy was agreed. There were 26 autopsy-identified missed clinical diagnoses found, mostly myocardial infarction (n = 4) and pneumonia (n = 4). In four patients (13%), a class I discrepancy was found. In fourteen patients (42%), a class II discrepancy was found. In conclusion, an autopsy is an important diagnostic tool that can identify definite causes of death. These diagnoses deviate from diagnoses established during admission in early deceased sepsis patients.

Autopsy examination in sudden cardiac death: a current perspective on behalf of the Association for European Cardiovascular Pathology

In sudden cardiac death, an autopsy is an essential step in establishing a diagnosis of inherited cardiac disease and identifying families that require cardiac screening. To evaluate aspects of post-mortem practice in Europe, a questionnaire was designed and circulated to both clinical and forensic pathologists. There was a 48% response rate and information was obtained from 17 countries. The results showed a wide variety in the management of sudden cardiac death, with a general tendency towards a lack of thorough investigation. In up to 40% of cases, autopsies were not performed in subjects less than 50 years who may have died from cardiac disease. Reasons for this were lack of finance and lack of interest from police, legal authorities, and doctors. Only 50% of pathologists seem to follow a standard protocol for autopsy examination, apparently due to lack of expertise and/or training. When autopsies were performed, histology and toxicology were almost always taken, genetic studies were generally available and retention of the heart for specialist study was usually permitted. Our results suggest that although the standard of practice is appropriate in many centres, many more cases should have autopsies, especially in sudden deaths in subjects less than 50 years.

Clinical Relevance of Unexpected Findings of Post-Mortem Computed Tomography in Hospitalized Patients: An Observational Study

Background and objective: The current literature describing the use of minimally invasive autopsy in clinical care is mainly focused on the cause of death. However, the identification of unexpected findings is equally important for the evaluation and improvement of daily clinical care. The purpose of this study was to analyze unexpected post-mortem computed tomography (PMCT) findings of hospitalized patients and assess their clinical relevance. Materials and methods: This observational study included patients admitted to the internal medicine ward. Consent for PMCT and autopsy was requested from the next of kin. Decedents were included when consent for at least PMCT was obtained. Consent for autopsy was not obtained for all decedents. All findings reported by PMCT were coded with an International Classification of Diseases (ICD) code. Unexpected findings were identified and subsequently categorized for their clinical relevance by the Goldman classification. Goldman class I and III were considered clinically relevant. Additionally, correlation with autopsy results and ante-mortem imaging was performed. Results: In total, 120 decedents were included and evaluated for unexpected findings on PMCT. Of them, 57 decedents also underwent an autopsy. A total of 1020 findings were identified; 111 correlated with the cause of death (10.9%), 508 were previously reported (49.8%), 99 were interpreted as post-mortem changes (9.7%), and 302 were classified as unexpected findings (29.6%). After correlation with autopsy (in 57 decedents), 24 clinically relevant unexpected findings remained. These findings were reported in 18 of 57 decedents (32%). Interestingly, 25% of all unexpected findings were not reported by autopsy. Conclusion: Many unexpected findings are reported by PMCT in hospitalized patients, a substantial portion of which is clinically relevant. Additionally, PMCT is able to identify pathology and injuries not reported by conventional autopsy. A combination of PMCT and autopsy can thus be considered a more comprehensive and complete post-mortem examination.

Needle placement accuracy in CT-guided robotic post mortem biopsy

Forensic autopsies include a thorough examination of the corpse to detect the source or alleged manner of death as well as to estimate the time since death. However, a full autopsy may be not feasible due to limited time, cost or ethical objections by relatives. Hence, we propose an automated minimal invasive needle biopsy system with a robotic arm, which does not require any online calibrations during a procedure. The proposed system can be easily integrated into the workflow of a forensic biopsy since the robot can be flexibly positioned relative to the corpse. With our proposed system, we performed needle insertions into wax phantoms and livers of two corpses and achieved an accuracy of 4.34 ± 1.27 mm and 10.81 ± 4.44 mm respectively.

Quality of care and maternal mortality in a tertiary-level hospital in Mozambique: a retrospective study of clinicopathological discrepancies

BACKGROUND

Although an increasing number of pregnant women in resource-limited areas deliver in health-care facilities, maternal mortality remains high in these settings. Inadequate diagnosis and management of common life-threatening conditions is an important determinant of maternal mortality. We analysed the clinicopathological discrepancies in a series of maternal deaths from Mozambique and assessed changes over 10 years in the diagnostic process. We aimed to provide data on clinical diagnostic accuracy to be used for improving quality of care and reducing maternal mortality.

METHODS

We did a retrospective analysis of clinicopathological discrepancies in 91 maternal deaths occurring from Nov 1, 2013, to March 31, 2015 (17 month-long period), at a tertiary-level hospital in Mozambique, using complete diagnostic autopsies as the gold standard to ascertain cause of death. We estimated the performance of the clinical diagnosis and classified clinicopathological discrepancies as major and minor errors. We compared the findings of this analysis with those of a similar study done in the same setting 10 years earlier.

FINDINGS

We identified a clinicopathological discrepancy in 35 (38%) of 91 women. All diagnostic errors observed were classified as major discrepancies. The sensitivity of the clinical diagnosis for puerperal infections was 17% and the positive predictive value was 50%. The sensitivity for non-obstetric infections was 48%. The sensitivity for eclampsia was 100% but the positive predictive value was 33%. Over the 10-year period, the performance of clinical diagnosis did not improve, and worsened for some diagnoses, such as puerperal infection.

INTERPRETATION

Decreasing maternal mortality requires improvement of the pre-mortem diagnostic process and avoidance of clinical errors by refining clinical skills and increasing the availability and quality of diagnostic tests. Comparison of post-mortem information with clinical diagnosis will help monitor the reduction of clinical errors and thus improve the quality of care.

FUNDING

Bill & Melinda Gates Foundation and Instituto de Salud Carlos III.

Introduction of postmortem CT increases the postmortem examination rate without negatively impacting the rate of traditional autopsy in daily practice: an implementation study

AIM

The aim of this implementation study was to assess the effect of postmortem CT (PMCT) and postmortem sampling (PMS) on (traditional) autopsy and postmortem examination rates. Additionally, the feasibility of PMCT and PMS in daily practice was assessed.

METHODS

For a period of 23 months, PMCT and PMS were used as additional modalities to the autopsy at the Department of Internal Medicine. The next of kin provided consent for 123 postmortem examinations. Autopsy rates were derived from the Dutch Pathology Registry, and postmortem examination rates were calculated for the period before, during and after the study period, and the exclusion rate, table time, time interval to informing the referring clinicians with results and the time interval to the Multidisciplinary Mortality Review Board (MMRB) meeting were objectified to assess the feasibility.

RESULTS

The postmortem examination rate increased (from 18.8% to 32.5%, p<0.001) without a decline in the autopsy rate. The autopsy rate did not change substantially after implementation (0.2% decrease). The exclusion rate was 2%, the table time was 23 min, and a median time interval of 4.1 hours between PMCT and discussing its results with the referring clinicians was observed. Additionally, more than 80% of the MMRB meetings were held within 8 weeks after the death of the patient.

CONCLUSIONS

Our study shows that the implementation of a multidisciplinary postmortem examination is feasible in daily practice and does not adversely affect the autopsy rate, while increasing the postmortem examination rate.

Can low autopsy rates be increased? Yes, we can! Should postmortem examinations in oncology be performed? Yes, we should! A postmortem analysis of oncological cases

Ever declining autopsy rates have been a concern of pathologists as well as clinicians for decades. Notably, in the field of oncology, data on autopsies and discrepancies between clinical and autoptic diagnoses are particularly scarce. In this retrospective study, we show the effect of a simple catalog of measures consisting of a different approach to obtain consent for autopsy, structured conferencing, and systematic teaching of residents, as well as a close collaboration between clinicians and pathologists on the numbers of autopsies, especially of oncological patients. Additionally, postmortem examination protocols from the years 2015 until 2019 were analyzed, regarding rates of discrepancies between clinical and autoptic causes of death in this category of patients. Autopsy numbers could be significantly increased from a minimum in 2014 (60 autopsies) to a maximum in 2018 (142 autopsies) (p < 0.0001). In the 67 autopsies of oncological cases, a high rate of 51% of major discrepancy between clinical and autoptic causes of death could be detected. In contrast to the general reported decline of autopsy rates, we present rising autopsy numbers over the past 5 years with an increasing number of oncological cases who underwent a postmortem examination. The high percentage of major discrepancies between clinical and autopsy diagnosis is in contrast to an expected decrease of major discrepancies in times of precise diagnostic methods and underlines the importance of autopsies to ensure high quality in diagnostics and therapy not only in the field of oncology.

Deontological examination as a criterion for the assessment of personal healthcare professional quality: A Strobe compliant retrospective study

Discrepancies between clinical and autopsy diagnoses range from 30% to 37%. The significance of deontological examinations remains high. In the pursuit of proper evaluation of diagnostic discrepancies, the establishment of pathogenesis, the mechanism of death, and a correct diagnosis are of particular importance.A retrospective study of deontological examinations, aimed at the detection of medical errors and carried out by the State Forensic Medicine Service during the period 1989 to 2016, was performed. The clinical and autopsy data from 1007 cases were collected in compliance with the research protocol.The number of deontological examinations tends to increase. In 60% of cases, the deceased were men. Most cases were in the age group of 50 to 59 years. Most examinations were carried out in relation to improperly provided healthcare services and the patient's death in surgery, admission, intensive care and obstetrics-gynecology departments. In 13% of cases, the diagnosis did not coincide and, in 79% of cases, the diagnoses fully coincided. In 68% of cases, the medical error was disproved.The number of deontological examinations is increasing. In most cases, clinical and autopsy diagnoses fully matched. Incorrectly clinically diagnosed intracranial injuries were the most common diagnostic mistakes. The data are similar to the results of research in other countries and would be relevant to ensuring the prevention of medical mistakes and the improvement of healthcare quality.

Added value of post-mortem computed tomography (PMCT) to clinical findings for cause of death determination in adult "natural deaths"

Purpose

The aim of this study was to investigate whether post-mortem computed tomography (PMCT) provides additional information regarding the cause of death and underlying diseases in a general practitioners’ (GP), out-of-hospital population.

Methods and materials

Bodies donated to our anatomy department between January 2014 and January 2018, who consecutively underwent a total body PMCT and had given permission for retrieval of their medical records during life, were included. PMCT scans were assessed by a radiologist and compared with the cause of death as stated in the medical records. Discrepancies were analyzed with an adjusted Goldman classification.

Results

Ninety-three out of the 274 scanned donors during the inclusion period had given consent for the retrieval of their medical records, of which 79 GP’s responded to the request thereof (31 men, 48 women, average age 72.8 years, range 36–99). PMCT identified 49 (62%) cases of cancer, 10 (12.7%) cardiovascular diseases, 8 (10.1%) severe organ failures, 5 (6.3%) cases with signs of pneumonia, 2 (2.5%) other causes, and 7 (8.9%) cases without an (underlying) definitive cause of death. Eleven major discrepancies on the Goldman classification scale, with possible relevance to survival between PMCT and GP records, were identified.

Conclusion

PMCT can have added value for the detection of additional findings regarding the cause of death in an out-of-hospital, GP’s population, especially to identify or exclude major (previously non-diagnosed) underlying diseases.

Cause of death and significant disease found at autopsy

The use of clinical autopsy has been in decline for many years throughout healthcare systems of developed countries despite studies showing substantial discrepancies between autopsy results and pre-mortal clinical diagnoses. We conducted a study to evaluate over time the use and results of clinical autopsies in Sweden. We reviewed the autopsy reports and autopsy referrals of 2410 adult (age > 17) deceased patients referred to two University hospitals in Sweden during two plus two years, a decade apart. There was a decline in the number of autopsies performed over time, however, mainly in one of the two hospitals. The proportion of autopsy referrals from the emergency department increased from 9 to 16%, while the proportion of referrals from regular hospital wards was almost halved. The autopsies revealed a high prevalence of cardiovascular disease, with myocardial infarction and cerebrovascular lesion found in 40% and 19% of all cases, respectively. In a large proportion of cases (> 30%), significant findings of disease were not anticipated before autopsy, as judged from the referral document and additional data obtained in some but not all cases. In accordance with previous research, our study confirms a declining rate of autopsy even at tertiary, academic hospitals and points out factors possibly involved in the decline.

A quarter century of decline of autopsies in the Netherlands

OBJECTIVE

Autopsy rates have been declining worldwide. The present study reports the outcome of a retrospective analysis of all non-forensic autopsies in the Netherlands over a course of 25 years, and compares these with the most recent Dutch study.

METHOD

Retrospectively, 25 years of data on clinical autopsies from the Nationwide Network and Registry of Histo- and Cytopathology in the Netherlands (PALGA) was paired with the mortality registry (Statistics Netherlands).

RESULTS

The crude prevalence of autopsies declined from 7.07% in 1991 to 2.73% in 2015. After adjusting for age at death, there was no difference in autopsy rate between males and females. An increasing age significantly decreased the autopsy rate.

CONCLUSION

In the Netherlands, clinical autopsies have been declining over the last quarter century. Age at death, but not sex, was associated with the autopsy rate. These different results stress the importance of correct collection and analysis methods of data.

Performance of the minimally invasive autopsy tool for cause of death determination in adult deaths from the Brazilian Amazon: an observational study

The uncertainty about the real burden of causes of death (CoD) is increasingly recognized by the international health community as a critical limitation for prioritizing effective public health measures. The minimally invasive autopsy (MIA) has shown to be a satisfactory substitute of the complete diagnostic autopsy (CDA), the gold standard for CoD determination in low- and middle-income countries. However, more studies are needed to confirm its adequate performance in settings with different epidemiology. In this observational study, the CoD obtained with the MIA were compared with the clinical diagnosis and the results of the CDA in 61 deaths that occurred in an infectious diseases referral hospital in Manaus, Brazilian Amazon. Concordance between the categories of diseases obtained by the three methods was evaluated by the Kappa statistic. Additionally, we evaluated discrepancies between clinical and complete diagnostic autopsy diagnoses. The MIA showed a substantial concordance with the CDA (Kappa = 0.777, 95% CI 0.608-0.946), and a perfect or almost perfect coincidence in specific diagnosis (ICD-10 code) between MIA and CDA was observed in 85% of the cases. In contrast, the clinical diagnosis showed a fair concordance with the CDA (Kappa = 0.311, 95% CI 0.071-0.552). Major clinico-pathological discrepancies were identified in 49% of cases. In conclusion, the MIA showed a substantial performance for CoD identification. Clinico-pathological discrepancies remain high and justify the need for post-mortem studies, even in referral hospitals. The MIA is a robust substitute of the CDA for CoD surveillance and quality improvement of clinical practice in low- and middle-income settings.

Post-Mortem Examination as a Quality Improvement Instrument

BACKGROUND

Autopsies are considered an important quality assurance instrument in medicine, yet autopsy rates in many countries have been declining for many years. The proper role of the post-mortem examination in modern medicine is a matter deserving of study.

METHODS

This review is based on a selective search of the literature for publications on the role of autopsies as a quality assurance instrument.

RESULTS

Multiple studies have revealed substantial rates of discrepancy between pre- and post-mortem diagnoses, with reported rates lying in the range of 10% to 40%. The frequen- cy of so-called Goldman I erroneous diagnoses, i.e., those that are determined at autopsy and might have influenced the patient's survival, ranges from 2.4% to 10.7%. It can be as- sumed that the rate of serious diagnostic errors revealed by autopsy would fall if autopsy rates were to rise. Independently of the above-mentioned studies, a large-scale study of data from the period 1988-2008 revealed a decline in the rate of Goldman I erroneous diagnoses by more than half. The qualitative effects of autopsies, however, are difficult to measure. At present, imaging studies and minimally invasive or endoscopic diagnostic procedures can be performed post mortem as well, but the available studies show that these methods do not yet suffice to enable a coherent pathogenetic classification of disease processes.

CONCLUSION

Autopsies should still be performed in the interest of quality assurance in medicine. Uniform standards in the performance and reporting of autopsies could lead to im- provement in the use of the data acquired through them.

A Case of Previously Unsuspected Cardiac Sarcoidosis Diagnosed at Autopsy and 23-Year Review of One Institution's Sarcoidosis Deaths

Sarcoidosis is a noncaseating granulomatous disease of unknown etiology. The incidence is 11 per 100 000 white individuals and 34 per 100 000 black individuals. Cardiac involvement is seen in 2% to 5% of patients with systemic sarcoidosis and is often clinically undetected. This may be due to relative rarity of cardiac involvement, variability in presentation, or that there are no good clinical criteria for the diagnosis of cardiac sarcoidosis. Patients may be totally asymptomatic or have heart block, myocardial infarctions, heart failure, or sudden cardiac death, which may be due to involvement of the conduction system by sarcoidosis. We present a case of a 54-year-old black male with hypertension and hyperlipidemia. Prior to his death, he was witnessed to suddenly stand up, grab his chest, and collapse. His clinical cause of death was hypertensive and atherosclerotic cardiovascular disease. A retrospective review of autopsy cases over the last 23 years (1995-2018) at our institution (n = 6900) was undertaken. This case illustrates a rare disease and highlights the importance of complete autopsy even in patients who might otherwise be signed out as an external exam or records review only.

Clinico-pathological discrepancies in the diagnosis of causes of death in adults in Mozambique: A retrospective observational study

Background

Clinico-pathological discrepancies are more frequent in settings in which limited diagnostic techniques are available, but there is little information on their actual impact.

Aim

We assessed the accuracy of the clinical diagnoses in a tertiary referral hospital in sub-Saharan Africa by comparison with post-mortem findings. We also identified potential risk factors for misdiagnoses.

Methods

One hundred and twelve complete autopsy procedures were performed at the Maputo Central Hospital (Mozambique), from November 2013 to March 2015. We reviewed the clinical records. Major clinico-pathological discrepancies were assessed using a modified version of the Goldman and Battle classification.

Results

Major diagnostic discrepancies were detected in 65/112 cases (58%) and were particularly frequent in infection-related deaths (56/80 [70%] major discrepancies). The sensitivity of the clinical diagnosis for toxoplasmosis was 0% (95% CI: 0–37), 18% (95% CI: 2–52) for invasive fungal infections, 25% (95% CI: 5–57) for bacterial sepsis, 34% (95% CI: 16–57), for tuberculosis, and 46% (95% CI: 19–75) for bacterial pneumonia. Major discrepancies were more frequent in HIV-positive than in HIV-negative patients (48/73 [66%] vs. 17/39 [44%]; p = 0.0236).

Conclusions

Major clinico-pathological discrepancies are still frequent in resource constrained settings. Increasing the level of suspicion for infectious diseases and expanding the availability of diagnostic tests could significantly improve the recognition of common life-threatening infections, and thereby reduce the mortality associated with these diseases. The high frequency of clinico-pathological discrepancies questions the validity of mortality reports based on clinical data or verbal autopsy.

Rare cause of pulmonary hypertension - pulmonary tumour thrombotic microangiopathy

Pulmonary tumour thrombotic microangiopathy (PTTA) is a rare but lethal cause of pulmonary hypertension (PHT). Its underlying mechanism is believed to be fibrocellular intimal proliferation and microthrombosis. It has been reported in association with gastric adenocarcinoma and breast, pancreatic and lung cancers. The diagnosis is often made on postmortem examination due to the absence of diagnostic criteria and its rare occurrence. We describe the case of a middle-aged man who presented with rapidly progressive PHT. He deteriorated into multiorgan failure despite aggressive medical therapy and died 4 weeks after his initial presentation. A postmortem examination confirmed the diagnosis of PTTA in addition to the finding of signet cell gastric adenocarcinoma. This case highlights the lethal nature of this rare condition, the ongoing challenges in making an antemortem diagnosis, and the importance of postmortem examination in determining the cause of death to provide closure for both, the treating physician and the family.

Reaffirming the Value of the Autopsy

OBJECTIVES

To determine characteristic features of myocardial infarction (MI) diagnosed at autopsy and establish the incidence of discrepancy.

METHODS

Autopsy cases at a tertiary hospital with a pathologic diagnosis of acute MI were evaluated for clinicopathologic features. Modified Goldman's classification was used to classify discrepant cases.

RESULTS

Of 529 autopsy cases, 19 (3.6%) demonstrated acute/subacute MI as a pathologic diagnosis. Thrombosis was identified in a minority of cases (3/19, 15.8%). Major clinicopathologic discrepancies were identified in four (21.1%) cases.

CONCLUSIONS

Although acute MI is an uncommon diagnosis rendered at hospital autopsy, a notable subset of cases demonstrates diagnostic discrepancy between the clinical impression and ultimate pathologic diagnosis. Interestingly, most MI cases in this series are not related to plaque disruption and thus best classified as a type 2 MI, which is associated with imbalance between oxygen demand and supply.

Autopsy rates in Iceland

A clinical as well as forensic autopsy is a uniform medical investigation of the deceased, which mainly serves to verify the plausibility of information on the cause, mode and mechanism of death provided by the police and/or medical personnel. Despite its importance in the context of a conclusive assessment of a person's medical history and in detecting any criminal correlation or malpractice, a significant decline in autopsies is evident in Iceland. This article gives an overview on autopsy rates in Iceland and compares the situation with European countries.

Determining the Cause of Death Among Children Hospitalized With Respiratory Illness in Kenya: Protocol for Pediatric Respiratory Etiology Surveillance Study (PRESS)

BACKGROUND

In sub-Saharan Africa, where the burden of respiratory disease-related deaths is the highest, information on the cause of death remains inadequate because of poor access to health care and limited availability of diagnostic tools. Postmortem examination can aid in the ascertainment of causes of death. This manuscript describes the study protocol for the Pediatric Respiratory Etiology Surveillance Study (PRESS).

OBJECTIVE

This study protocol aims to identify causes and etiologies associated with respiratory disease-related deaths among children (age 1-59 months) with respiratory illness admitted to the Kenyatta National Hospital (KNH), the largest public hospital in Kenya, through postmortem examination coupled with innovative approaches to laboratory investigation.

METHODS

We prospectively followed children hospitalized with respiratory illness until the end of clinical care or death. In case of death, parents or guardians were offered grief counseling, and postmortem examination was offered. Lung tissue specimens were collected using minimally invasive tissue sampling and conventional autopsy where other tissues were collected. Tissues were tested using histopathology, immunohistochemistry, and multipathogen molecular-based assays to identify pathogens. For each case, clinical and laboratory data were reviewed by a team of pathologists, clinicians, laboratorians, and epidemiologists to assign a cause of and etiology associated with death.

RESULTS

We have enrolled pediatric cases of respiratory illness hospitalized at the KNH at the time of this submission; of those, 14.8% (140/945) died while in the hospital. Both analysis and interpretation of laboratory results and writing up of findings are expected in 2019-2020.

CONCLUSIONS

Postmortem studies can help identify major pathogens contributing to respiratory-associated deaths in children. This information is needed to develop evidence-based prevention and treatment policies that target important causes of pediatric respiratory mortality and assist with the prioritization of local resources. Furthermore, PRESS can provide insights into the interpretation of results using multipathogen testing platforms in resource-limited settings.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/10854.

Evaluation of the discrepancy between clinical diagnostic hypotheses and anatomopathological diagnoses resulting from autopsies

OBJECTIVES

An objective of clinical autopsies is to determine the final cause of death and the pathological changes that may have triggered it. Despite advances in Medicine, the level of discrepancy between clinical and autopsy diagnoses remains significant. The aim of this study was to compare the data obtained from autopsies carried out at the São Bernardo do Campo/SP Death Verification Section with clinical diagnostic hypotheses proposed during medical care.

METHOD

This was a retrospective study involving the comparison of necroscopic reports issued by the São Bernardo do Campo/São Paulo Death Verification Section in 2014 and 2015 and the Cadaver Referral Guides completed by attending physicians prior to the necroscopic examination.

RESULTS

A total of 465 cases were analyzed. In general, discrepancies between the clinical diagnostic hypothesis and the autopsy diagnosis occurred in 28% of the cases. A logistic regression model, with diagnostic discrepancy as a response variable and sex, age, duration of care, type of institution providing medical care and organ system as explanatory variables, was fit to the data; the results indicated that all explanatory variables with the exception of organ system are not significant (p>0.132).

CONCLUSIONS

Discrepancies between clinical diagnostic hypotheses and autopsy diagnoses continue to occur, despite new developments in complementary examinations and therapies. The odds of a discrepancy when patients present with diseases of the cardiac system are greater than those when there are problems in the vascular, endocrine and neurological systems.

Implementation of modern tools in autopsy practice-the way towards contemporary postmortal diagnostics

Medical, legal, and socioeconomic issues have contributed to the decline of autopsy rates. Pathology-related factors, however, with changing clinical duties on the one hand and decreasing interest and lack of substantial technical developments in this field on the other, may have contributed to this condition as well. We present our experience of a restructuring project that culminated in the introduction of a modernized postmortal diagnostic (PMD) unit: Workflows of PMD procedures and space organization were restructured according to LEAN management principles method. Classical autopsy suites were transformed into postmortal operating rooms. A PMD pathologist staff was designated to perform postmortal operative diagnostics (i.e., using laparotomy and thoracotomy approaches) with the intention of gradually replacing classical autopsy procedures. Postmortal minimal invasive diagnostics (PMID) using laparoscopy and thoracoscopy were successfully implemented with the expertise of clinical colleagues. Reorganization of workflow reduced turn-around times for PMD reports from a median of 33 days to 15 days. Short-term analysis revealed that this combined effort leads to a slight increase in the number of adult postmortal examinations 1 year after the introduction of this project. A change of culture in postmortal diagnostics may contribute to a better reputation of postmortal examinations from the perspective of clinicians, the general public, and affected relatives of the deceased. It may also serve to demonstrate that the pathology community is keen not only to preserve but also to further develop this valuable tool for medical quality control and education.

Death within 30 days of fine needle aspiration: Post-mortem confirmation of FNA diagnoses and the contribution of FNA to patient mortality

BACKGROUND

Fine needle aspiration (FNA) diagnoses are usually confirmed via surgical pathology or via evaluation of clinical outcomes. However, such confirmation may not occur for patients who die shortly after FNA, and autopsy may be a useful quality assessment tool in these cases. Also, there is little data investigating the relationship between FNA and mortality. We sought to demonstrate the autopsy as a quality assessment tool for the FNA and assess the contribution of FNA to mortality in patients who die soon after the procedure.

METHODS

A search of our database was performed from 1992 to 2016 for patients who were autopsied after dying within 30 d of an FNA. Concordance between findings from FNA, autopsy, and any intervening surgical pathology material was determined. Finally, a subjective determination of the likelihood that FNAs contributed to deaths was made by reviewing autopsy reports. The contribution was categorised as either "unlikely", "possible", or "probable".

RESULTS

Fifty-eight patients (average age = 58 y) met the search criteria. Thirty-six (62%) patients had malignancies. Surgical pathology material was obtained concurrently or following FNA in 20 cases (34%). There was 73% concordance between FNA and autopsy findings, which compares to 80% concordance between FNA and surgical pathology diagnoses. The FNA was determined to be at least possibly contributory to death in 7/58 cases (3 cases designated as "probable," and 4 as "possible").

CONCLUSION

Autopsy can be used to validate FNA diagnoses and, like surgical pathology, confirms that FNA diagnoses are mostly accurate. However, in a small number of patients, FNA can precipitate death.

Understanding uncertainty in medicine: concepts and implications in medical education

In an era of high technology and low trust, acknowledging and coping with uncertainty is more crucial than ever. Medical uncertainty has been considered an innate feature of medicine and medical practice. An intolerance to uncertainty increases physicians' stress and the effects of burnout and may be a potential threat to patient safety. Understanding medical uncertainty and acquiring proper coping strategies has been regarded to be a core clinical competency for medical graduates and trainees. Integrating intuition and logic and creating a culture that acknowledges medical uncertainty could be suggested ways to teach medical uncertainty. In this article, the authors describe the concepts of medical uncertainty, its influences on physicians and on medical students toward medical decision making, the role of tolerance/intolerance to uncertainty, and proposed strategies to improve coping with medical uncertainty.

Access to pathology and laboratory medicine services: a crucial gap

As global efforts accelerate to implement the Sustainable Development Goals and, in particular, universal health coverage, access to high-quality and timely pathology and laboratory medicine (PALM) services will be needed to support health-care systems that are tasked with achieving these goals. This access will be most challenging to achieve in low-income and middle-income countries (LMICs), which have a disproportionately large share of the global burden of disease but a disproportionately low share of global health-care resources, particularly PALM services. In this first in a Series of three papers on PALM in LMICs, we describe the crucial and central roles of PALM services in the accurate diagnosis and detection of disease, informing prognosis and guiding treatment, contributing to disease screening, public health surveillance and disease registries, and supporting medical-legal systems. We also describe how, even though data are sparse, these services are of both insufficient scope and inadequate quality to play their key role in health-care systems in LMICs. Lastly, we identify four key barriers to the provision of optimal PALM services in resource-limited settings: insufficient human resources or workforce capacity, inadequate education and training, inadequate infrastructure, and insufficient quality, standards, and accreditation.

Can virtual autopsy with postmortem CT improve clinical diagnosis of cause of death? A retrospective observational cohort study in a Dutch tertiary referral centre

OBJECTIVE

To investigate whether virtual autopsy with postmortem CT (PMCT) improves clinical diagnosis of the immediate cause of death.

DESIGN

Retrospective observational cohort study.

INCLUSION CRITERIA

inhospital and out-of-hospital deaths over the age of 1 year in whom virtual autopsy with PMCT and conventional autopsy were performed.

EXCLUSION CRITERIA

forensic cases, postmortal organ donors and cases with incomplete scanning procedures. Cadavers were examined by virtual autopsy with PMCT prior to conventional autopsy. The clinically determined cause of death was recorded before virtual autopsy and was then adjusted with the findings of virtual autopsy. Using conventional autopsy as reference standard, we investigated the increase in sensitivity for immediate cause of death, type of pathology and anatomical system involved before and after virtual autopsy.

SETTING

Tertiary referral centre.

PARTICIPANTS

86 cadavers that underwent conventional and virtual autopsy between July 2012 and June 2016.

INTERVENTION

PMCT consisted of brain, cervical spine and chest-abdomen-pelvis imaging. Conventional autopsy consisted of thoracoabdominal examination with/without brain autopsy.

PRIMARY AND SECONDARY OUTCOME MEASURES

Increase in sensitivity for the immediate cause of death, type of pathology (infection, haemorrhage, perfusion disorder, other or not assigned) and anatomical system (pulmonary, cardiovascular, gastrointestinal, other or not assigned) involved, before and after virtual autopsy.

RESULTS

Using PMCT, the sensitivity for immediate cause of death increased with 12% (95% CI 2% to 22%) from 53% (41% to 64%) to 64% (53% to 75%), with 18% (9% to 27%) from 65% (54% to 76%) to 83% (73% to 91%) for type of pathology and with 19% (9% to 30%) from 65% (54% to 76%) to 85% (75% to 92%) for anatomical system.

CONCLUSION

While unenhanced PMCT is an insufficient substitute for conventional autopsy, it can improve diagnosis of cause of death over clinical diagnosis alone and should therefore be considered whenever autopsy is not performed.

Autopsy rates in the Netherlands: 35 years of decline

Objective

Although the autopsy still is a valuable tool in health statistics, health care quality control, medical education, and biomedical research, autopsy rates have been declining worldwide. The aim of this study was to examine trends of overall, clinical and forensic autopsy rates among adults in the Netherlands over the last four decades, and trends per sex, age (groups), and hospital type.

Methods

We performed a retrospective study covering 35 years of Dutch national death counts (1977–2011), the number of in-hospital deceased patients, the number of deaths due to external causes, and the proportion of autopsies performed in these populations. The effects of sex, age and hospital category were analysed by linear and logistic regression and differences were evaluated by chi-square tests.

Results

Overall autopsy rates declined by 0.3% per calendar year, clinical autopsy rates by 0.7% per calendar year (from 31.4% to 7.7%), and forensic autopsy rates did not decline. Per calendar year the fraction of in-hospital deceased patients decreased by 0.2%. Autopsy rates were highest among men and younger patients; clinical autopsy rates were highest for patients dying in academic hospitals.

Conclusions

In the Netherlands clinical autopsy rates have rapidly declined while at the same time the fraction of in-hospital deaths decreased, both contributing to the overall reduced absolute number of autopsies performed. It is important to improve awareness among both clinicians and general practitioners of the significance of the clinical autopsy.

Prevalence of Lung Lesions at Autopsy: A Histopathological Study

INTRODUCTION

Autopsies are carried out to establish the identity, cause of death, time of death, and ante-mortem or post-mortem nature of death. These help in establishing the cause of death and ascertain the disease process which led to death.

AIM

To study the prevalence and pattern of lung diseases in medicolegal autopsies, confirmed by histopathological examination.

MATERIALS AND METHODS

This retrospective study was carried out in the Department of Pathology. Tissue bits from lungs, retrieved at the time of autopsy, were preserved in 10% formalin. These were processed and examined microscopically. A total of 86 cases were received during the period of study.

RESULTS

Among these 86 cases, in 4 cases (4.8%) the tissue was autolysed and in another 26 cases (30.1%) histopathology was unremarkable. Significant microscopic findings were found in 56 cases (65.1%). Wide spectrum of microscopic findings were seen, the commonest being oedema and congestion (28.5%) followed by changes in interstitium (11.9%). There were 9.5% cases of granulomatous inflammation and 5.9% cases each of acute pneumonia and emphysema. There were 1.2% cases each of Hyaline Membrane Disease (HMD), Meconium Aspiration Syndrome (MAS) and Acute Respiratory Distress Syndrome (ARDS) in the series. The series also had 1.2% cases of young adult having fungal colonies surrounded by necrosis and abscess formation. Possibility of mucormycosis was suggested in that case.

CONCLUSION

This study highlights various lesions in lungs confirmed by histopathology, which were either incidental or direct cause of death. The short coming in present study was non receipt of whole organ or representative sample at the time of autopsy, which if overcome will set much higher standard of autopsy reporting and would be a more useful tool in understanding cause of death.

An Essential Pathology Package for Low- and Middle-Income Countries

Objectives

We review the current status of pathology services in low- and middle-income countries and propose an “essential pathology package” along with estimated costs. The purpose is to provide guidance to policy makers as countries move toward universal health care systems.

Methods

Five key themes were reviewed using existing literature (role of leadership; education, training, and continuing professional development; technology; accreditation, management, and quality standards; and reimbursement systems). A tiered system is described, building on existing proposals. The economic analysis draws on the very limited published studies, combined with expert opinion.

Results

Countries have underinvested in pathology services, with detrimental effects on health care. The equipment needs for a tier 1 laboratory in a primary health facility are modest ($2-$5,000), compared with $150,000 to $200,000 in a district hospital, and higher in a referral hospital (depending on tests undertaken). Access to a national (or regional) specialized laboratory undertaking disease surveillance and registry is important. Recurrent costs of appropriate laboratories in district and referral hospitals are around 6% of the hospital budget in midsized hospitals and likely decline in the largest hospitals. Primary health facilities rely largely on single-use tests.

Conclusions

Pathology is an essential component of good universal health care.

Diagnostic accuracy of postmortem imaging vs autopsy-A systematic review

Background Postmortem imaging has been used for more than a century as a complement to medico-legal autopsies. The technique has also emerged as a possible alternative to compensate for the continuous decline in the number of clinical autopsies. To evaluate the diagnostic accuracy of postmortem imaging for various types of findings, we performed this systematic literature review. Data sources The literature search was performed in the databases PubMed, Embase and Cochrane Library through January 7, 2015. Relevant publications were assessed for risk of bias using the QUADAS tool and were classified as low, moderate or high risk of bias according to pre-defined criteria. Autopsy and/or histopathology were used as reference standard. Findings The search generated 2600 abstracts, of which 340 were assessed as possibly relevant and read in full-text. After further evaluation 71 studies were finally included, of which 49 were assessed as having high risk of bias and 22 as moderate risk of bias. Due to considerable heterogeneity - in populations, techniques, analyses and reporting - of included studies it was impossible to combine data to get a summary estimate of the diagnostic accuracy of the various findings. Individual studies indicate, however, that imaging techniques might be useful for determining organ weights, and that the techniques seem superior to autopsy for detecting gas Conclusions and Implications In general, based on the current scientific literature, it was not possible to determine the diagnostic accuracy of postmortem imaging and its usefulness in conjunction with, or as an alternative to autopsy. To correctly determine the usefulness of postmortem imaging, future studies need improved planning, improved methodological quality and larger materials, preferentially obtained from multi-center studies.

Discrepancies Between Clinical Diagnoses and Autopsy Findings in Critically Ill Children: A Prospective Study

OBJECTIVES

To evaluate the discrepancies between clinical and autopsy diagnoses in patients who died in the pediatric intensive care units (PICUs) of a tertiary care university hospital.

METHODS

A prospective study of all consecutive autopsies discussed at monthly mortality conferences over 5 years. Discrepancies between premortem and autopsy diagnoses were classified according to modified Goldman et al criteria.

RESULTS

From January 1, 2011, to December 31, 2015, a total of 2,679 children were admitted to the two PICUs of our hospital; 257 (9.6%) died, 150 (58.4%) underwent autopsy, and 123 were included. Complete concordance between clinical and postmortem diagnoses was observed in 86 (69.9%) patients; 20 (16.3%) had a class I discrepancy, and eight (6.5%) had a class II discrepancy. Comparing 2011 and 2015, the rate of major discrepancies decreased from 31.6% to 15%.

CONCLUSIONS

Our results emphasize the importance of autopsy to clarify the cause of death and its potential contribution to improvement of team performance and quality of care.