bluuebunny/crossref_metadata_2025_split huggingface dataset:
Graft Vascular Disease After Cardiac Transplantation and Its Relationship to Mean Acute Rejection Score
Authors: Alexander Russell T. , Lathrop Sarah , Vollmer Robin , Blue Laura , Russell Stuart D. , Steenbergen Charles 
Published: February 2021

Abstract
Context.—Graft vascular disease remains a significant source of morbidity and mortality in heart transplant patients. The influence of acute cellular rejection on the development of graft vascular disease is controversial.
Objective.—To determine the relationship between mean acute cellular rejection score and the presence of atherosclerosis or fibrointimal hyperplasia in cardiac allografts at autopsy.
Design.—This retrospective, autopsy-based study examined 27 heart transplant patients to evaluate for graft vascular disease. A rejection score for each patient was calculated as the average of all the rejection scores determined by endomyocardial biopsy. Gross and histologic examination of the heart was used to divide patients into 3 groups: no coronary artery disease, atherosclerosis, and fibrointimal hyperplasia. Mean rejection scores were calculated for each of these groups for all patients and patients who survived longer than 3 months. Mean rejection scores were compared by an analysis of variance and pairwise t tests.
Results.—Mean rejection scores demonstrated a trend of increasing value from no coronary disease (0.323) to atherosclerosis (0.569) to fibrointimal hyperplasia (0.835). Only fibrointimal hyperplasia had a significantly higher mean rejection score compared with patients with no coronary disease when examined in all patients (P = .01) and in patients who survived longer than 3 months (P = .049).
Conclusion.—This study showed that the development of coronary artery fibrointimal hyperplasia, but not atherosclerosis, was significantly related to mean acute rejection score.
Passive Seeding in Metanephric Adenoma: A Review of Pseudometastatic Lesions in Perinephric Lymph Nodes
Authors: Paner Gladell P. , Turk Thomas M. , Clark Joseph I. , Lindgren Valerie , Picken Maria M. 
Published: February 2021

Abstract
Lymph node involvement derived from a discrete neoplastic process fundamentally implies tumor malignancy. However, rarely, inconsequential passive transport of benign neoplastic cells to the lymph node can occur and may cause confusion as to the nature of the neoplasm (ie, malignant vs benign). We describe a 10-cm right renal metanephric adenoma incidentally discovered in a 30-year-old woman during cesarean section for a triplet pregnancy. Subsequent nephrectomy following an equivocal needle biopsy diagnosis showed histologic features classic for metanephric adenoma, including the lack of cytologic atypia and mitoses. Necrosis present in this lesion appeared to be secondary to tumor physical disruption. The tumor cells were positive for Wilms tumor 1 (WT1) antigen, pankeratin, and CD57, focally positive for epithelial membrane antigen, and negative for cytokeratin 7, cytokeratin 34βE12, and CD56. Electron microscopy confirmed the tumor's epithelial nature, and cytogenetics revealed a diploid 46XX karyotype. The tumor proliferation index with Ki-67 was only 3% to 5% and the proliferating cell nuclear antigen index was 0%. A single, concurrently resected hilar lymph node contained scattered subcapsular, sinusoidal, and focally intralymphovascular psammoma bodies along with occasional adherent epithelial cells. These cells were highlighted by pankeratin but were nonreactive to WT1 antigen, similar to the nonviable cells in the primary tumor. Clinical surveillance and follow-up showed no disease recurrence 4 years after nephrectomy. We postulate that the lymph node inclusions found in this case represent passive transport of neoplastic cells to the lymph node following manipulation of the renal mass. We conclude that this phenomenon is understudied and underrecognized and can easily be mistaken for metastasis.
Inflammatory Sarcomatoid Carcinoma: A Case Report and Discussion of a Malignant Tumor With Benign Appearance
Authors: Antic Tatjana , Kapur Umesh , Vigneswaran Wickii T. , Oshima Kiyoko 
Published: February 2021

AbstractInflammatory sarcomatoid carcinoma is an aggressive tumor with an unusually benign appearance. We report the case of a 65-year-old man with a history of inoperable poorly differentiated carcinoma of the right lung, for which he had received chemoradiotherapy. A new solitary mass was discovered 4 years later in the left lung on surveillance computed tomography. The patient underwent thoracotomy with a wedge biopsy on which frozen section was performed. The nodule was vaguely granulomatous and associated with a mixed inflammatory infiltrate and a deceptively bland spindle cell proliferation. Results of immunoperoxidase studies, however, showed that the nodule contained neoplastic cells with an epithelial phenotype that were invading the pulmonary vessels. These are features of the rare inflammatory sarcomatoid carcinoma. In contrast to sarcomatoid carcinomas, this case highlights the deceptively benign appearance of inflammatory sarcomatoid carcinoma. This leads us to concur with the recommendation to exercise caution when attempting the diagnosis of apparently benign lesions on intraoperative frozen section in patients with high clinical suspicion of malignancy.
What's New in Hereditary Colorectal Cancer?
Authors: Jass Jeremy R. 
Published: February 2021

AbstractPrecancerous polyposes other than classic familial adenomatous polyposis and the condition hereditary nonpolyposis colorectal cancer, or Lynch syndrome, continue to present major diagnostic challenges for the anatomic pathologist. This editorial highlights the practical significance of novel insights and clinical guidelines in the recent literature, as well as in 4 contributions to this edition of the Archives of Pathology & Laboratory Medicine. The first section will address attenuated familial adenomatous polyposis and a newly recognized type of autosomal-recessive adenomatous polyposis associated with the DNA repair gene MYH. The remainder of the editorial discusses the role of the revised Bethesda guidelines in the diagnosis of hereditary nonpolyposis colorectal cancer and concludes with the recently identified serrated pathway syndrome.
High-Grade Pancreatic Intraepithelial Neoplasia in a Patient With Familial Adenomatous Polyposis
Authors: Gupta Chakshu , Mazzara Paul F. 
Published: February 2021

Abstract
Familial adenomatous polyposis (FAP) is caused by mutation of the adenomatous polyposis coli (APC) gene and is characterized by multiple colorectal adenomas and tumors of other organs and sites. A 58-year-old woman with FAP syndrome and previous total colectomy presented for routine follow-up examination. Abdominal ultrasound and subsequent endoscopic evaluation revealed ampullary and duodenal polyps, as well as inhomogeneity of the pancreatic head. A pancreaticoduodenectomy confirmed multiple duodenal adenomas. In addition, high-grade pancreatic intraepithelial neoplasia (PanIN-3) was found in the smaller pancreatic ducts. Pancreatic precancerous lesions have only rarely been described in FAP, including 2 pancreatic duct adenomas and 2 intraductal papillary mucinous neoplasms. A review of the world English literature revealed no reports of PanIN-3 in association with FAP. Further studies are required to determine if patients with FAP are at increased risk for pancreatic premalignant lesions.
Differential Diagnosis of Benign and Malignant Mesothelial Proliferations on Pleural Biopsies
Authors: Cagle Philip T. , Churg Andrew 
Published: February 2021

AbstractContext.—Although much of the pathology literature focuses on differential diagnosis of diffuse malignant mesothelioma from other types of cancer, the primary diagnostic challenge facing the pathologist is often whether a mesothelial proliferation on a pleural biopsy represents a malignancy or a benign reactive hyperplasia.Design.—Based on previous medical publications, extensive personal consultations, and experience on the United States–Canadian Mesothelioma Reference Panel and the International Mesothelioma Panel, salient information was determined about interpretation of benign versus malignant mesothelial proliferations on pleural biopsies.Results.—Differentiation of benign reactive mesothelial hyperplasia from diffuse malignant mesothelioma is often difficult. Benign reactive mesothelial hyperplasia may mimic many features ordinarily associated with malignancy, and diffuse malignant mesothelioma may be cytologically bland. Entrapment of benign reactive mesothelial cells within organizing pleuritis may mimic tissue invasion.Conclusions.—Various histologic clues favor a benign over a malignant mesothelial proliferation and vice versa. Invasion is the most reliable criterion for determining that a mesothelial proliferation is malignant. When there is any doubt that a pleural biopsy represents a malignancy, we recommend a diagnosis of atypical mesothelial proliferation.
Cell Proliferation and Inflammation on Biopsy Samples With Multifocal Atrophic Gastritis Before and 1 Year After Helicobacter pylori Eradication
Authors: Guarner Jeannette , Bartlett Jeanine , Seitz Roslyn , Whistler Toni , Herrera-Goepfert Roberto , Mohar Alejandro , Sanchez Luz , Halperin David , Parsonnet Julie 
Published: February 2021

Abstract
Context.—Results of clinical trials that have assessed whether gastric cancer is preventable with Helicobacter pylori eradication therapy remain inconclusive. These trials have used atrophy, intestinal metaplasia, and dysplasia as histopathologic end points that reflect possible preneoplastic lesions. Trial results would be more compelling if cell proliferation and inflammatory markers improved simultaneously with histopathologic lesions.
Objective.—To study the presence of cell proliferation markers and type of inflammatory cells in biopsy specimens with gastritis, atrophy, and intestinal metaplasia before and 1 year after H pylori therapy and to determine if immunohistochemistry can be used to study these.
Design.—We evaluated 12 subjects with gastritis and 16 with gastritis and multiple foci of atrophy and intestinal metaplasia by using immunohistochemical assays for tumor suppressor protein p53, proliferation marker Ki-67, cell cycle regulator cyclin D1, T and B lymphocytes, macrophages, and TUNEL (terminal deoxynucleotide transferase deoxyuridine triphosphate nick end labeling) assay for apoptosis. The biopsy specimens were selected from a randomized clinical trial that studied improvement of histopathologic gastric lesions after H pylori eradication.
Results.—Groups of surface epithelial cells that expressed p53 and Ki-67 were observed more often in subjects with atrophy and intestinal metaplasia compared with those with gastritis alone. T lymphocytes in the lamina propria were frequently observed 1 year after treatment in subjects with atrophy and intestinal metaplasia.
Conclusions.—Immunohistochemical assays for cell proliferation and inflammatory cell markers showed different distribution patterns in these gastric biopsy specimens. The presence of T lymphocytes and groups of cells that expressed proliferation markers in subjects with multiple foci of atrophy and intestinal metaplasia needs further study.
Death Certification Errors at an Academic Institution
Authors: Pritt Bobbi S. , Hardin Nicholas J. , Richmond Jeffrey A. , Shapiro Steven L. 
Published: February 2021

Abstract
Context.—The correctly completed death certificate provides invaluable personal, epidemiologic, and legal information and should be thorough and accurate. Death certification errors are common and range from minor to severe.
Objective.—To determine the frequency and type of errors by nonpathologist physicians at a university-affiliated medical center.
Design.—Fifty random patients were identified who died at this academic medical center between January 2002 and December 2003 and did not undergo an autopsy. From medical chart review, clinical summaries were produced. Two pathologists used these summaries to create mock death certificates. The original and mock death certificates were then compared to identify errors in the original certificate. Errors were graded on a I to IV scale, with grade IV being the most severe.
Results.—Of the 50 death certificates reviewed, grade I, II, and III errors were noted in 72%, 32%, and 30%, respectively. Seventeen certificates (34%) had grade IV errors (wrong cause or manner of death). Multiple errors were identified in 82% of the death certificates reviewed.
Conclusions.—The rate of major (grade IV) death certification errors at this academic setting is high and is consistent with major error rates reported by other academic institutions. We attribute errors to house staff inexperience, fatigue, time constraints, unfamiliarity with the deceased, and perceived lack of importance of the death certificate. To counter these factors, we recommend a multifaceted approach, including an annual course in death certification and discussion of the death certificate for each deceased patient during physician rounds. These measures should result in increased accuracy of this important document.
Nonsecretory Variant of Immunoproliferative Small Intestinal Disease: A Case Report With Pathologic, Immunophenotypic, and Molecular Findings
Authors: Pai Reetesh K. , Snider, MD Warren K. , Starkey Cindi R. , Viswanatha David , Foucar M. Kathryn , Wilson Carla S. 
Published: February 2021

Abstract
We report a case of the nonsecretory variant of immunoproliferative small intestinal disease involving the distal small bowel and the mesenteric and retroperitoneal lymph nodes in a 19-year-old woman from Mexico. This variant extranodal marginal zone B-cell lymphoma appeared similar in the different sites of involvement, with more interspersed large cells and greater plasmacytic differentiation present in intestinal specimens. Characteristic lymphoepithelial lesions and follicular colonization were seen in intestinal and lymph node sections, respectively. The neoplastic B cells were cytoplasmic immunoglobulin (Ig) A heavy-chain restricted and lacked surface and cytoplasmic light-chain expression by flow cytometric analysis. Serum and urine protein electrophoresis/immunofixation revealed hypogammaglobulinemia with no paraprotein. Molecular studies showed absence of immunoglobulin heavy-chain (IgH) gene rearrangement, with a nonfunctional clonotypic rearrangement of the κ light-chain gene. This case highlights the role for κ light-chain gene evaluation in immunoproliferative small intestinal disease, because IgH gene rearrangement analysis is often negative.
Do 40% of Patients Resected for Barrett Esophagus With High-Grade Dysplasia Have Unsuspected Adenocarcinoma?
Authors: Tschanz Elizabeth R. 
Published: February 2021

Abstract
Results of studies conducted in the last 2 decades suggest that the detection of high-grade dysplasia in patients with Barrett esophagus is the harbinger of a synchronous adenocarcinoma, which remains undetected even by rigorous biopsy protocols but is discovered during resection of the esophagus. The reported prevalence of synchronous carcinomas ranges from 0% to 75%. Other researchers maintain that appropriate surveillance programs can be used to detect carcinomas at a curable stage and to prevent unnecessary esophagectomies. Both logistical difficulties and potential methodological pitfalls have plagued many studies designed to investigate this issue. A large multicenter study that would stratify participants for hitherto unexplored variables (eg, age, gender, and ethnic background) may be required before the 40% occult cancer prevalence can be either confirmed or refuted. However, the large scale needed for such a study to provide reliable data and new developments in endoscopic imaging (eg, magnification endoscopy and optical coherence tomography) and endoscopic therapy (eg, mucosectomy) are likely to make such a study both ethically unacceptable and logistically and financially unfeasible. Future research should utilize the combination of new endoscopic technologies with the continuing search for validated biomarkers that help predict the biological behavior of Barrett epithelium in individual patients, with a particular focus on the possible development of preneoplastic and neoplastic lesions. Pathologists who chose to shift their focus from the traditional morphological investigation of dysplasia to the search for usable biomarkers can position themselves at the center of innovative research projects that could radically modify the management of patients with Barrett esophagus.
Is Adenocarcinoma of the Esophagogastric Junction or Cardia Different From Barrett Adenocarcinoma?
Authors: Ectors Nadine , Driessen Ann , De Hertog Gert , Lerut Toni , Geboes Karel 
Published: February 2021

Abstract
Over time the relative distribution of cancers of the proximal digestive tract has changed. Squamous cell carcinomas of the esophagus have become less common, while numbers of adenocarcinomas have greatly increased. This shift most likely reflects an increase in the incidence of gastroesophageal reflux. Moreover, there is a decline in the incidence of distal gastric cancer, which in turn may be related to Heliobacter pylori eradication. Simultaneously, there is a time trend toward a more proximal localization of gastric cancer. If the above-mentioned etiopathologic links are correct, this could indicate that the so-called cardia adenocarcinomas are not related to H pylori infection and that they may instead be related to gastroesophageal reflux and eventually may not be considered to be “gastric” cancers. The rapidly growing quantity of literature on this subject is, however, confounding. A major source of discordance would seem to be a Babylonian confusion of tongues concerning the terms cardia and cardiac carcinomas. Unfortunately, this confusion is also apparent in the classification systems available for staging of cancer, thus closing the “vicious” circle.
Rapid Quantitative Analysis of Human Cytomegalovirus DNA by the Real-Time Polymerase Chain Reaction Method
Authors: Numata Sanae , Nakamura Yasuhiro , Imamura Yutaka , Honda Junichi , Momosaki Seiya , Kojiro Masamichi 
Published: February 2021

Abstract
Context.—Human cytomegalovirus (CMV) infection is a progressive and life-threatening complication in immunocompromised patients even now. Therefore, early and accurate treatment based on rapid and certain detection is needed to prevent fatal CMV infection diseases.
Objective.—To study a quicker, simpler, and less expensive method of quantitative analysis using real-time polymerase chain reaction based on the SYBR Green I method of CMV detection for appropriate treatment of CMV infection in immunocompromised patients.
Design.—We quantified 50 samples tested by direct immunoperoxidase staining of leukocytes with peroxidase-labeled monoclonal antibody (C7-HRP test), 30 samples from healthy persons, and 47 samples from 7 patients suspected of having CMV infection diseases. We used the primer set in the pp65 gene of CMV and whole blood without a preparatory process. The setting for the study was the First Department of Pathology, Kurume University School of Medicine, St Mary's Hospital, and the Gene Section of the Clinical Laboratory at St Mary's Hospital, Fukuoka, Japan.
Results.—The results obtained with this method corresponded well with conventional C7-HRP tests and demonstrated excellent reproduction. Additionally, the results were better correlated with the clinical course than were C7-HRP tests.
Conclusions.—This method was more useful than the C7-HRP test as a rapid diagnostic test for early treatment of CMV infection. This test also demonstrated its usefulness for monitoring CMV infection during treatment using ganciclovir. Moreover, it was quicker, simpler, and cheaper than other real-time polymerase chain reaction methods.
Association of Drowning and Myocarditis in a Pediatric Population: An Autopsy-Based Study
Authors: Somers Gino R. , Smith Charles R. , Wilson Gregory J. , Zielenska Maria , Tellier Raymond , Taylor Glenn P. 
Published: February 2021

Abstract
Context.—Drowning is a frequent cause of accidental death in childhood, but the association of myocarditis and drowning has only rarely been reported.
Objective.—To report 5 cases of drowning in children with coexistent myocarditis.
Design.—A retrospective review of autopsy records of patients 0 years to 18 years of age was performed during a 6-year period (1998–2003, total cases reviewed = 1431).
Results.—Twenty-two drownings were identified, in 14 male and 8 female children. Five patients (23%), 3 female and 2 male children, had coexistent myocarditis. The 5 patients ranged in age from 23 months to 13 years (mean, 7 years 2 months). None of the patients had antecedent symptomatology suggestive of myocarditis. In all patients, the myocarditis was focal mild or moderate, and the inflammatory infiltrate comprised lymphocytes with smaller numbers of neutrophils. All 5 patients had foci of myocyte necrosis. One patient had histologic evidence of myocardial hypertrophy but no evidence of a cardiomyopathy. Microbiologic studies, including culture, immunohistochemistry, polymerase chain reaction, and reverse transcriptase polymerase chain reaction, revealed Mycoplasma pneumoniae DNA in 1 case.
Conclusions.—The finding of myocarditis in a significant proportion of drowning victims in this series highlights the importance of a thorough autopsy examination in apparently straightforward cases and has clinicopathologic significance.
Clinical Diagnoses and Autopsy Findings: A Retrospective Analysis of 252 Cases in Greece
Authors: Spiliopoulou Chaido , Papadodima Stavroula , Kotakidis Nikolaos , Koutselinis Antonios 
Published: February 2021

Abstract
Context.—Despite medical and technologic advances, clinicians may misdiagnose a patient's situation and the cause of death. Autopsy may be valuable in uncovering the most frequent diagnostic pitfalls and helping clinicians to learn and to develop the medical art and science.
Objective.—To compare the clinical diagnoses with postmortem findings and evaluate the frequency of diagnostic errors assessed by autopsies.
Design.—Retrospective analysis of the protocols of 252 consecutive cases of adult patients autopsied in the Department of Forensic Medicine and Toxicology of Athens Medical School during the period 1999–2003. The outcome measures included concordance between diagnosis before death and at autopsy, sex, age, and length of hospitalization of the patient.
Results.—In 73 cases (29%), the autopsy findings confirmed the clinical diagnosis and the cause of death suggested by the clinicians. In 45 cases (19%), the clinical diagnosis and the cause of death suggested by the clinicians were discordant with the autopsy findings. In 105 cases (42%), the autopsy requests did not include any suggestion about the cause of the patient's death. In 7 cases (3%), several diagnoses were suggested by the clinicians, and in 16 cases (6%), the comparison between clinical and postmortem diagnosis was not possible. The most frequently misdiagnosed diseases were coronary disease and pulmonary embolism.
Conclusions.—It is concluded from this study that autopsies may reveal unexpected findings that are of critical importance and that a continued emphasis on autopsy evaluation is necessary to improve the quality of patient care.