Abstract:
:Factor V Leiden (FVR506Q) is a genetic defect in the factor V (FV) molecule that confers resistance to proteolysis by activated protein C (APC) and is the most common abnormality detected in patients studied for hereditary thrombophilia. The initial screening test for this abnormality was a comparison of the activated partial thromboplastin time (APTT) in the presence and absence of APC, expressed as a ratio. But this has been shown to lack sensitivity for the FV mutation. Other clot-based screening tests, such as the modified APTT, using FV-deficient plasma, or the Russell viper venom (RVV) time assay have improved sensitivity. Eighty-seven samples were studied using the RVV-based assay. This assay was performed on platelet-poor plasma (PPP-RVV) and whole blood (WB-RVV). All samples were analyzed by polymerase chain reaction (PCR) for the FV Leiden defect: 77 were PCR negative; 10 were PCR positive. Using a threshold ratio of 1.8, all samples were correctly categorized in the PPP-RVV and the WB-RVV tests, showing an observed sensitivity and specificity of 1.0. These results suggest that an RVV-based assay using whole blood could be an effective screening test for this common abnormality.
journal_name
Am J Clin Patholjournal_title
American journal of clinical pathologyauthors
Akhtar MS,Blair AJ,King TC,Sweeney JDdoi
10.1093/ajcp/109.4.387subject
Has Abstractpub_date
1998-04-01 00:00:00pages
387-91issue
4eissn
0002-9173issn
1943-7722journal_volume
109pub_type
杂志文章abstract::We describe a method of spectrophotometric detection of BCR/ABL chimeric sequences amplified by multiplex reverse transcriptase-polymerase chain reaction (RT-PCR), enabling the use of archival hematologic slides as RNA sources. Multiplex PCR amplified b3a2, b2a2, and e1a2 break points of the BCR/ABL translocation and ...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/108.4.383
更新日期:1997-10-01 00:00:00
abstract::The diagnostic expert system for colonic lesions (DESCL) was designed to discriminate colonic adenoma and adenocarcinoma from normal colonic tissue. Although it was originally developed for use in conjunction with a machine vision analytic system, the DESCL has evolved into a teaching tool and a model for conceptual m...
journal_title:American journal of clinical pathology
pub_type: 杂志文章,评审
doi:
更新日期:1990-10-01 00:00:00
abstract::This study investigates the dispensing and inoculating characteristics of the MIC-2000 micro-broth dilution system and compares its ability to determine minimum inhibitory concentrations with that of the reference macro-broth dilution method. Micro-well filling showed a coefficient of variation of 6.8%, and micro-well...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/73.3.374
更新日期:1980-03-01 00:00:00
abstract::Spiral arteries, from curetted endometrium, of first-trimester pregnancies, were examined in 342 consecutive cases, comprising 150 primigravida and 192 multigravida . Vascular changes, similar to the "acute atherosis ," described at the end of pregnancy in preeclamptic women, were found. Primigravida had a statistical...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/81.6.702
更新日期:1984-06-01 00:00:00
abstract::Hematogones (HGs) comprise a B-lineage lymphoid precursor cell population in the bone marrow (BM) that may simulate acute lymphoblastic leukemia or lymphoma. Increased numbers of HGs have been noted in children, but few reports describe their occurrence in adults. We identified 13 adult patients with significant numbe...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/102.2.202
更新日期:1994-08-01 00:00:00
abstract::Current methods for testing stool samples for hemoglobin utilize peroxidase oxidation of chemical indicators such as guaiac or benzidine. These tests have frequent false-positive and false-negative results, complicating random screening for occult gastrointestinal bleeding. The authors have developed an immunochemical...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/69.1.342
更新日期:1978-03-01 00:00:00
abstract:OBJECTIVES:Luminex-based single-antigen bead human leukocyte antigen (HLA) antibody testing is widely used to define HLA antibodies for transplant compatibility. False-negative results can occur with complement-mediated prozone inhibition. This study assessed the effect of EDTA on the assay background reactivity and fl...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/aqw116
更新日期:2016-09-01 00:00:00
abstract::Immunophenotypic analysis of acute leukemias is time consuming and often requires flow cytometric analysis. A 1-hour alkaline phosphatase-labeled streptavidin-biotin immunocytochemical procedure was evaluated as an alternative. Seventeen cases of acute leukemia, including 10 acute lymphocytic (ALL) and 7 acute nonlymp...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/97.6.876
更新日期:1992-06-01 00:00:00
abstract::Reports of sex steroid receptor expression in chordoma suggest that these tumors may be responsive to hormone manipulation therapy. Immunohistochemical stains for estrogen receptor (ER)-alpha, ER-beta, progesterone receptor (PR), androgen receptor (AR), and cyclooxygenase 2 (COX-2), were performed on a tissue microarr...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/8T2NPHLK5X5WQ3E7
更新日期:2007-09-01 00:00:00
abstract::We determined whether there were additional diagnostic findings in additional level sections performed on polyps with no pathologic diagnosis (NPD) or those in which only lymphoid aggregates (LAs) were seen initially and determined the level at which findings were identified. All colorectal biopsy specimens submitted ...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/27NQ-A1R2-DQ41-20Y7
更新日期:2002-03-01 00:00:00
abstract::Anaerobiospirillum succiniciproducens is a little-known spiral bacterium. Presented here are two septicemia cases similar in that both occurred in rural northern Virginia, both patients presented with dental infection, and in both cases the organism was first suspected to be Campylobacter. The morphology, motility, bi...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/85.1.73
更新日期:1986-01-01 00:00:00
abstract:OBJECTIVES:Solid tumor metastases to the pancreas are rare, and only limited literature on the topic is available. In this retrospective study, we reviewed 107 cases of solid tumor metastases to the pancreas diagnosed by fine-needle aspiration (FNA) from 2005 to 2019. METHODS:Information including the patients' clinic...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/aqaa090
更新日期:2020-10-13 00:00:00
abstract::Suspensions of lymphoid cells from tissues have been used for the determination of the quantitative relationship between the T and B cell populations. The distribution of the lymphocytes within a given tissue, however, cannot be demonstrated once such a suspension has been prepared. Various methods of characterizing l...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/67.3.230
更新日期:1977-03-01 00:00:00
abstract:OBJECTIVES:To assess physicians' and nurses' satisfaction with the service provided by the laboratory at Gondar University Hospital. METHODS:We conducted a cross-sectional study involving 196 nurses and physicians. RESULTS:Overall level of satisfaction was 51.1% for nurses and 51.5% for physicians. Lack of consistenc...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/AJCPU1PLVOIN5JQI
更新日期:2013-09-01 00:00:00
abstract::This study describes results of fresh-frozen immunohistochemistry applied to two typical Warthin's tumors. Polyclonal follicular center cell staining and an apparent reduction in the number of T-lymphocytes were found. These observations tend to support the concept that the lymphoid infiltrate in Warthin's tumor repre...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/74.6.795
更新日期:1980-12-01 00:00:00
abstract::Several monoclonal antibodies (MoAbs) are now available for immunophenotyping non-Hodgkin's lymphomas (NHLs) in paraffin-embedded tissue sections. To determine the reliability of these reagents in predicting the genotype, 44 cases of NHL were studied with the alkaline phosphatase-anti-alkaline phosphatase technique wi...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/95.4.517
更新日期:1991-04-01 00:00:00
abstract::Blood gas measurements performed at the central laboratory and at a satellite laboratory of Brigham and Women's Hospital were studied to determine the differences in quality, turnaround time (TAT), and cost. The quality in both laboratories, as determined by results on proficiency and quality control samples, satisfac...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/102.1.7
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVES:To examine high expression of tumor necrosis factor ligand superfamily member 13 (TNFSF13), which is correlated with several malignancies. METHODS:TNFSF13 messenger RNA expression in tumor cells and fibroblasts in a cohort of patients with non-small cell lung cancer (NSCLC) was analyzed by quantitative real...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/AJCP4JP8BZOMHEAW
更新日期:2014-02-01 00:00:00
abstract::A case of Torulopsis glabrata endocarditis involving the mitral valve is reported. Endocarditis developed during convalescence from severe abdominal trauma and was associated with fungemia. Morphologically characteristic organisms were present in the mitral valve. ...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/70.3.420
更新日期:1978-09-01 00:00:00
abstract::Protease inhibitor serpin-B2 (plasminogen activator inhibitor-2 [PAI-2]) protects pRb from degradation in human papillomavirus (HPV)-18+ HeLa cells. Our objective was to assess whether the pRb-mediated HPV-suppressive effect of PAI-2 in cancer cell lines has implications in the outcome of HPV infections. Cervical biop...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/AJCPQQ07WUTZUTES
更新日期:2009-12-01 00:00:00
abstract::A two-sample plot is often used to display test results in clinical chemistry external quality control programs. The use of control materials at different concentrations calls for a re-evaluation of the two-sample plot. A modification of the two-sample plot is presented. The axes of the graph are graduated in units of...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/67.1.91
更新日期:1977-01-01 00:00:00
abstract::Chemotherapy is a well-established therapeutic approach for several malignancies, but its clinical efficacy is often limited by its related cardiotoxicity, which leads to cardiomyopathy, possibly evolving into heart failure. To detect cardiac damage, the adopted diagnostic approach is the estimation of left ventricula...
journal_title:American journal of clinical pathology
pub_type: 杂志文章,评审
doi:10.1309/AJCPB66LRIIVMQDR
更新日期:2008-11-01 00:00:00
abstract::Data from the 1978 CAP Hematology Survey were analyzed for the effect of sodium and calcium salts of heparin on the activated partial thromboplastin time (APTT). The results indicate that the sodium salt of heparin prolongs the APTT more than the calcium salt at a heparin concentration of 0.2 units/ml. Furthermore, th...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:
更新日期:1980-10-01 00:00:00
abstract::To establish the feasibility of immunotyping specimens transported over great distance, the University of Arizona and the Cleveland Clinic exchanged 39 lymphoma cases (26 B-cell, 13 T-cell cases) via air express for phenotyping. They were exchanged with the use of glass slides with adherent snap-frozen sections. The m...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/87.4.478
更新日期:1987-04-01 00:00:00
abstract::Autopsy reports of 231 adult autopsies were examined for clinically unexpected diagnoses. Analysis of data showed that 97 of 188 autopsy diagnoses were clinically unexpected. The diagnosis of pulmonary embolism was clinically the most frequently missed diagnosis relative to its actual occurrence. Also noted was that t...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/93.4.486
更新日期:1990-04-01 00:00:00
abstract::Complete hydatidiform moles (CHM) and partial hydatidiform moles (PHM) represent different clinicopathologic entities. To obtain prognostic and therapeutic information about both entities, it is important that pathologic classification be as accurate as possible. The distinction of molar pregnancy and an abortus with ...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/110.6.776
更新日期:1998-12-01 00:00:00
abstract:Objectives:To evaluate the prevalence of potentially unnecessary repeat testing (PURT) and the associated economic burden for an inpatient population at a large academic medical facility. Methods:We evaluated all inpatient test orders during 2016 for PURT by comparing the intertest times to published recommendations. ...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/aqy020
更新日期:2018-05-31 00:00:00
abstract:OBJECTIVES:Fundic gland polyps (FGPs) occur in two clinical settings, sporadic and syndromic. Epithelial dysplasia is rare in sporadic FGPs, and progression data from large series are lacking. The aim of this study was to evaluate the clinical, morphologic, and immunohistochemical features in a large series of sporadic...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/AJCPGK8QTYPUQJYL
更新日期:2015-10-01 00:00:00
abstract::The Department of Laboratory Medicine, University of Washington, has explored various management of organizational approaches over the past seven years. The Centralized Processing Area supported by a computerized information system has evolved from these efforts. Despite a decrease in U.W. hospital usage since 1968-69...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1093/ajcp/67.2.149
更新日期:1977-02-01 00:00:00
abstract::Cytokeratin (CK) expression was studied in 22 sinonasal inverted papillomas. Columnar (respiratory) epithelium in inverted papillomas abundantly expressed CK7, CK8, CK18, and CK19. Immunoreactivity for CK5/14 and CK17 was found in basal and parabasal/suprabasal cells. Transitional (cuboidal) and squamous epithelium in...
journal_title:American journal of clinical pathology
pub_type: 杂志文章
doi:10.1309/TH5J-T1Q6-9QJR-8CDK
更新日期:2001-05-01 00:00:00