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BACKGROUND: Gestational trophoblastic disease comprises hydatidiform moles and a rare group of malignancies that derive from trophoblasts. Although there are typical morphological features that may distinguish hydatidiform moles from non-molar products of conception, such features are not always present, especially at early stages of pregnancy. Furthermore, mosaic/chimeric pregnancies and twin pregnancies make pathological diagnosis challenging while trophoblastic tumours can also pose diagnostic problems in terms of their gestational or non-gestational origin. OBJECTIVES: To show that ancillary genetic testing can be used to aid diagnosis and clinical management of GTD. METHODS: Each author identified cases where genetic testing, including short tandem repeat (STR) genotyping, ploidy analysis, next generation sequencing and immunostaining for p57, the product of the imprinted gene CDKN1C, facilitated accurate diagnosis and improved patient management. Representative cases were chosen to illustrate the value of ancillary genetic testing in different scenarios. OUTCOME: Genetic analysis of placental tissue can aid in determining the risk of developing gestational trophoblastic neoplasia, facilitating discrimination between low risk triploid (partial) and high risk androgenetic (complete) moles, discriminating between a hydatidiform mole twinned with a normal conceptus and a triploid conception and identification of androgenetic/biparental diploid mosaicism. STR genotyping of placental tissue and targeted gene sequencing of patients can identify women with an inherited predisposition to recurrent molar pregnancies. Genotyping can distinguish gestational from non-gestational trophoblastic tumours using tissue or circulating tumour DNA, and can also identify the causative pregnancy which is the key prognostic factor for placental site and epithelioid trophoblastic tumours. CONCLUSIONS AND OUTLOOK: STR genotyping and P57 immunostaining have been invaluable to the management of gestational trophoblastic disease in many situations. The use of next generation sequencing and of liquid biopsies are opening up new pathways for GTD diagnostics. Development of these techniques has the potential to identify novel biomarkers of GTD and further refine diagnosis.
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OBJECTIVES: The objective of this study was to collect information on human Chorionic Gonadotrophin (hCG) laboratory testing and reporting in women with Gestational Trophoblastic Disease (GTD), to assess the associated challenges, and to offer perspectives on hCG testing harmonisation. DESIGN: Information was collected from laboratories by electronic survey (Survey Monkey®) using a questionnaire designed by members of the European Organisation for the Treatment of Trophoblastic Disease (EOTTD) hCG Working Party. PARTICIPANTS: The questionnaire was distributed by the EOTTD board to member laboratories and their associated scientists who work within the GTD field. SETTING: The questionnaire was distributed and accessed via an online platform. METHODS: The questionnaire consisted of 5 main sections. These included methods used for hCG testing, quality procedures, reporting of results, laboratory operational aspects, and non-GTD testing capability. In addition to reporting these survey results, examples of case scenarios which illustrate the difficulties faced by laboratories providing hCG measurement for GTD patient management were described. The benefits and challenges of using centralised versus non-centralised hCG testing were discussed alongside the utilisation of regression curves for management of GTD patients. RESULTS: Information from the survey was collated and presented for each section and showed huge variability in responses across laboratories even for those using the same hCG testing platforms. An educational example was presented, highlighting the consequence of using inappropriate hCG assays on clinical patient management (Educational Example A), along with an example of biotin interference (Educational Example B) and an example of high-dose hook effect (Educational Example C), demonstrating the importance of knowing the limitations of hCG tests. The merits of centralised versus non-centralised hCG testing and use of hCG regression curves to aid patient management were discussed. LIMITATIONS: To ensure the survey was completed by laboratories providing hCG testing for GTD management, the questionnaire was distributed by the EOTTD board. It was assumed the EOTTD board held the correct laboratory contact, and that the questionnaire was completed by a scientist with in-depth knowledge of laboratory procedures. CONCLUSIONS: The hCG survey highlighted a lack of harmonisation of hCG testing across laboratories. Healthcare professionals involved in the management of women with GTD should be aware of this limitation. Further work is needed to ensure an appropriate quality assured laboratory service is available for hCG monitoring in women with GTD.
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Phenomenon: This article reports the under-researched presentation of demographic, social, and economic diversity in medical school examination questions. Approach: The present study audited 3,566 pre-clinical and clinical multiple-choice and short answer examination questions in the same year (2018) from three medical schools in two continents to review the diversity of patients portrayed. The audit was based on an extension of Critical Race Theory beyond race and ethnicity to include pertinent social determinants of health. Findings: Patients were presented in 1,537 (43.1%) of the audited examination questions. Apart from age (89.4%) and binary genders (93.9%), other diversity characteristics were rarely portrayed (ethnicity 7.2%, relationship status 1.9%, sexual identity 1.1%, socio-economic status 0.5%, geographic residence 0.1%, disability 0.1%), or not at all (non-binary genders; residency status; religion/spirituality). Insights: While presenting excessive and unnecessary patient characteristics in examination questions should be avoided, the absence of many diversity aspects may reduce examination authenticity and defeat the teaching of diversity in medicine. Medical schools should consider a routine audit and reasonable improvement of the diversity features of patients in examination questions to support teaching and learning activities addressing patients' diversity.
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BACKGROUND: Optimizing transitions from final year of medical school and into first post graduate year has important implications for students, patients and the health care system. Student experiences during novel transitional roles can provide insights into potential opportunities for final year curricula. We explored the experiences of medical students in a novel transitional role and their ability to continue learning whilst working as part of a medical team. METHODS: Novel transitional role for final year medical students were created in partnership by medical schools and state health departments in 2020 in response to the COVID-19 pandemic and the need for a medical surge workforce. Final year medical students from an undergraduate entry medical school were employed as Assistants in Medicine (AiMs) in urban and regional hospitals. A qualitative study with semi-structured interviews at two time points was used to obtain experiences of the role from 26 AiMs. Transcripts were analyzed using deductive thematic analysis with Activity theory as a conceptual lens. RESULTS: This unique role was defined by the objective of supporting the hospital team. Experiential learning opportunities in patient management were optimized when AiMs had opportunities to contribute meaningfully. Team structure and access to the key instrument, the electronic medical record, enabled participants to contribute meaningfully, whilst contractual arrangements and payments formalized the obligations to contribute. CONCLUSIONS: The experiential nature of the role was facilitated by organizational factors. Structuring teams to involve a dedicated medical assistant position with specific duties and access to the electronic medical record sufficient to complete duties are key to successful transitional roles. Both should be considered when designing transitional roles as placements for final year medical students.
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COVID-19 , Educación de Pregrado en Medicina , Médicos , Estudiantes de Medicina , Humanos , Pandemias , COVID-19/epidemiología , Investigación Cualitativa , CurriculumRESUMEN
BACKGROUND: Non-islet cell tumour hypoglycemia (NICTH) is rarely encountered in clinical practice. Insulin-like growth factor 2 (IGF2) is the most common cause of NICTH observed in the setting of mesenchymal and epithelial neoplasia. This is a paraneoplastic syndrome caused by IGF2 activation of the insulin receptor. CASE PRESENTATION: An 80 year old female presented with a short history of recurrent episodes of confusion with laboratory confirmed hypoglycemia with a plasma glucose of 2.7 mmol/L on fasting which fulfilled Whipple's triad. Diagnostic clues to the aetiology at presentation include the fasting pattern of hypoglycemia, hypokalaemia and the absence of weight gain. A 72 hour fast with results showed early hypoglycemia and suppression of serum insulin, c-peptide, and proinsulin. Serum insulin antibody was not detected. Subsequent measurement of the serum IGF2:IGF1 ratio was elevated at 22.3 and consistent with IGF-2 mediated hypoglycemia and imaging studies demonstrated a pelvic mass. Dietary intervention and oral prednisolone abated hypoglycemia prior to surgery. Ultimately, hypoglycemia resolved following operative intervention and steroid therapy was successfully withdrawn. Histopathology was remarkable for dual neoplastic processes with uterine solitary fibrous tumour (SFT) confirmed as the source of IGF2 hypersecretion on IGF-2 immunohistochemistry and a coincidental invasive high grade serous carcinoma involving the fimbria of the right fallopian tube. CONCLUSION: The paradox in this case is that the benign solitary fibrous tumour accounted for patient morbidity through secretion of IGF2 and without treatment, posed a mortality risk. This is despite the synchronous presence of a highly malignant fallopian tube neoplasm. This case reinforces the need for thorough clinical evaluation of hypoglycemia to allow prompt and definitive management.
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Hipoglucemia , Insulinas , Síndromes Paraneoplásicos , Tumores Fibrosos Solitarios , Femenino , Humanos , Anciano de 80 o más Años , Factor II del Crecimiento Similar a la Insulina/metabolismo , Hipoglucemia/diagnóstico , Hipoglucemia/etiología , Tumores Fibrosos Solitarios/complicaciones , Síndromes Paraneoplásicos/etiología , Insulinas/uso terapéuticoRESUMEN
Short-read next generation sequencing (NGS) has become the predominant first-line technique used to diagnose patients with rare genetic conditions. Inherent limitations of short-read technology, notably for the detection and characterization of complex insertion-containing variants, are offset by the ability to concurrently screen many disease genes. "Third-generation" long-read sequencers are increasingly being deployed as an orthogonal adjunct technology, but their full potential for molecular genetic diagnosis has yet to be exploited. Here, we describe three diagnostic cases in which pathogenic mobile element insertions were refractory to characterization by short-read sequencing. To validate the accuracy of the long-read technology, we first used Sanger sequencing to confirm the integration sites and derive curated benchmark sequences of the variant-containing alleles. Long-read nanopore sequencing was then performed on locus-specific amplicons. Pairwise comparison between these data and the previously determined benchmark alleles revealed 100% identity of the variant-containing sequences. We demonstrate a number of technical advantages over existing wet-laboratory approaches, including in silico size selection of a mixed pool of amplification products, and the relative ease with which an automated informatics workflow can be established. Our findings add to a growing body of literature describing the diagnostic utility of long-read sequencing.
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Análisis Mutacional de ADN/métodos , Secuencias Repetitivas Esparcidas/genética , Mutagénesis Insercional/genética , Secuenciación de Nanoporos/métodos , ADN/análisis , ADN/genética , Bases de Datos Genéticas , Secuenciación de Nucleótidos de Alto Rendimiento/métodos , Humanos , Neoplasias/genéticaRESUMEN
During genome replication, polymerase epsilon (Pol ε) acts as the major leading-strand DNA polymerase. Here we report the identification of biallelic mutations in POLE, encoding the Pol ε catalytic subunit POLE1, in 15 individuals from 12 families. Phenotypically, these individuals had clinical features closely resembling IMAGe syndrome (intrauterine growth restriction [IUGR], metaphyseal dysplasia, adrenal hypoplasia congenita, and genitourinary anomalies in males), a disorder previously associated with gain-of-function mutations in CDKN1C. POLE1-deficient individuals also exhibited distinctive facial features and variable immune dysfunction with evidence of lymphocyte deficiency. All subjects shared the same intronic variant (c.1686+32C>G) as part of a common haplotype, in combination with different loss-of-function variants in trans. The intronic variant alters splicing, and together the biallelic mutations lead to cellular deficiency of Pol ε and delayed S-phase progression. In summary, we establish POLE as a second gene in which mutations cause IMAGe syndrome. These findings add to a growing list of disorders due to mutations in DNA replication genes that manifest growth restriction alongside adrenal dysfunction and/or immunodeficiency, consolidating these as replisome phenotypes and highlighting a need for future studies to understand the tissue-specific development roles of the encoded proteins.
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Insuficiencia Suprarrenal/genética , ADN Polimerasa II/genética , Retardo del Crecimiento Fetal/genética , Mutación/genética , Osteocondrodisplasias/genética , Proteínas de Unión a Poli-ADP-Ribosa/genética , Anomalías Urogenitales/genética , Adolescente , Adulto , Alelos , Niño , Preescolar , Inhibidor p57 de las Quinasas Dependientes de la Ciclina/genética , Replicación del ADN/genética , Femenino , Humanos , Lactante , Masculino , Persona de Mediana Edad , Fenotipo , Adulto JovenRESUMEN
AIM: To review the clinical course, outcome and incidence of infantile salt wasting associated with urinary tract infection (UTI) and/or urinary tract malformation (UTM) over a two-year surveillance period on the island of Ireland. METHODS: A two-year (2013-14) prospective surveillance undertaken via the Irish and Ulster Paediatric Surveillance Units. Monthly prepaid postcards were circulated to consultant paediatricians (n = 260) at all paediatric units on the island of Ireland. Infants under one year of age presenting for the first time with hyponatraemia (Na < 130 mmol/L) and/or hyperkalaemia (K > 5.0 mmol/L) associated with urosepsis/UTM were reported. RESULTS: All 7 reported patients (6 male) had culture-proven UTI, and 5 (71%) also had an underlying UTM (one diagnosed antenatally). Four (57%) patients had a documented elevated serum aldosterone supporting secondary pseudohypoaldosteronism (PHA) as the underlying diagnosis. Data on aldosterone were not reported in the other 3 patients, but clinical features were suggestive of secondary PHA. The estimated incidence for the Irish population of transient PHA is 1 per 13,200 total live births per year. CONCLUSIONS: Salt wasting is a rare complication of UTI, especially if associated with underlying UTM. Boys appear to be at particular risk.
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Seudohipoaldosteronismo , Infecciones Urinarias , Niño , Humanos , Incidencia , Lactante , Irlanda/epidemiología , Masculino , Estudios Prospectivos , Seudohipoaldosteronismo/diagnóstico , Seudohipoaldosteronismo/epidemiología , Sodio , Infecciones Urinarias/complicaciones , Infecciones Urinarias/epidemiologíaRESUMEN
The aim of the present study was to investigate the knowledge about oral cancer in a Brazilian population, including initial clinical signs, causal factors, and the health professional of first choice when suspected of the disease. A total of 2261 participants were interviewed in a cross-sectional study, to investigate associations between sociodemographic descriptive variables and knowledge of oral cancer, risk factors, disease precursor lesions, and health professional of choice for diagnosis. The variables were descriptively analyzed and possible associations investigated considering p values < 0.05. A total of 83.4% of participants reported knowing about oral cancer, and 59.5% reported knowing about potentially malignant lesions; both variables were associated (p < 0.0001). Tobacco was identified as the main risk factor (83.6%), followed by family history (66.2%), and poor oral hygiene (54.5%). Interviewees with higher education level had greater knowledge about cancer (p < 0.0001), and the dentist was the health professional of choice for 43.1% of those who knew about the disease (p = 0.007), with the generalist being the most sought specialist. The population evaluated had a low knowledge of oral cancer given the lack of specific clarifications on etiological factors and risk situations. Health education initiatives are necessary to increase population awareness of potentially malignant oral lesions and improve early diagnosis and recognition of the dentist as a qualified professional for diagnosis of the disease.
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Neoplasias de la Boca , Estudios Transversales , Educación en Salud , Conocimientos, Actitudes y Práctica en Salud , Humanos , Neoplasias de la Boca/diagnóstico , Factores de Riesgo , Encuestas y CuestionariosRESUMEN
BACKGROUND: Lung cancer screening (LCS) requires complex processes to identify eligible patients, provide appropriate follow-up, and manage findings. It is unclear whether LCS in real-world clinical settings will realize the same benefits as the National Lung Screening Trial (NLST). OBJECTIVE: To evaluate the impact of process modifications on compliance with LCS guidelines during LCS program implementation, and to compare patient characteristics and outcomes with those in NLST. DESIGN: Retrospective cohort study. SETTING: Kaiser Permanente Colorado (KPCO), a non-profit integrated healthcare system. PATIENTS: A total of 3375 patients who underwent a baseline lung cancer screening low-dose computed tomography (S-LDCT) scan between May 2014 and June 2017. MEASUREMENTS: Among those receiving an S-LDCT, proportion who met guidelines-based LCS eligibility criteria before and after LCS process modifications, differences in patient characteristics and outcomes between KPCO LCS patients and the NLST cohort, and factors associated with a positive screen. RESULTS: After modifying LCS eligibility confirmation processes, patients receiving S-LDCT who met guidelines-based LCS eligibility criteria increased from 45.6 to 92.7% (P < 0.001). Prior to changes, patients were older (68 vs. 67 years; P = 0.001), less likely to be current smokers (51.3% vs. 52.5%; P < 0.001), and less likely to have a ≥ 30-pack-year smoking history (50.0% vs. 95.3%; P < 0.001). Compared with NLST participants, KPCO LCS patients were older (67 vs. 60 years; P < 0.001), more likely to currently smoke (52.3% vs. 48.1%; P < 0.001), and more likely to have pulmonary disease. Among those with a positive baseline S-LDCT, the lung cancer detection rate was higher at KPCO (9.4% vs. 3.8%; P < 0.001) and was positively associated with prior pulmonary disease. CONCLUSION: Adherence to LCS guidelines requires eligibility confirmation procedures. Among those with a positive baseline S-LDCT, comorbidity burden and lung cancer detection rates were notably higher than in NLST, suggesting that the study of long-term outcomes in patients undergoing LCS in real-world clinical settings is warranted.
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Detección Precoz del Cáncer , Neoplasias Pulmonares , Colorado/epidemiología , Humanos , Neoplasias Pulmonares/diagnóstico por imagen , Neoplasias Pulmonares/epidemiología , Tamizaje Masivo , Estudios Retrospectivos , FumarRESUMEN
Objectives. To understand the experiences of local health jurisdictions with Senate Bill 277 (SB277), the California law that eliminated nonmedical vaccine exemptions for public- and private-school entry.Methods. We conducted semistructured telephone interviews with health officers and local health department (LHD) staff in California between August and September 2017.Results. Two overall themes emerged: (1) vague legislative and regulatory language led to variation in the interpretation and implementation of SB277, and (2) lack of centralized review of medical exemptions allowed medical exemptions that are not consistent with valid contraindications for immunizations to be accepted. Variation in the interpretation and implementation was commonly reported with provisions related to individualized education programs and special education, and independent study programs and homeschooling. Without a centralized review of medical exemption requests, respondents reported variation in the interpretation of which specialties of physicians can write medical exemptions, which conditions constitute a valid contraindication for immunization, and the process for reporting a questionable or suspicious medical exemption.Conclusions. The regulatory language within SB277 led to variation in how the law was interpreted and implemented within and across LHD jurisdictions and school districts.
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Política de Salud/legislación & jurisprudencia , Instituciones Académicas/legislación & jurisprudencia , Vacunación/legislación & jurisprudencia , California , Confidencialidad , Humanos , Entrevistas como Asunto , Lenguaje , Padres/psicología , Vacunación/normasRESUMEN
OBJECTIVE: This research aimed to describe the developmental trajectories of clinical psychology trainees across competency domains over multiple placements. METHOD: Competency reviews of 252 trainees were completed at mid-placement and end-placement for up to four consecutive placements by 143 field supervisors. Competency was measured across multiple domains using the Clinical Psychology Practicum Competencies Rating Scale. RESULTS: There was an overall ascending stepped pattern occurring across all competency domains from early to late placements. The starting point of competency ratings varied across domains with the largest discrepancy between Response to supervision (highest) and Intervention competencies (lowest). There were significant increases from mid-placement to end-placement for all competencies within each of the four placements. There were few significant decreases in competency between different placements and these were largely restricted to the transition from placement one to placement two. CONCLUSIONS: This research has the potential to be used as a benchmark to indicate expected levels of competency attainment for trainees across their training, allowing for early identification of difficulties and more targeted remediation plans.
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Competencia Clínica , Preceptoría , Psicología Clínica/educación , Australia , Femenino , Humanos , MasculinoRESUMEN
BACKGROUND: The genetic basis for dilated cardiomyopathy (DCM) can be difficult to determine, particularly in familial cases with complex phenotypes. Next generation sequencing may be useful in the management of such cases. METHODS: We report two large families with pleiotropic inherited cardiomyopathy. In addition to DCM, the phenotypes included atrial and ventricular septal defects, cardiac arrhythmia and sudden death. Probands underwent whole exome sequencing to identify potentially causative variants. RESULTS: Each whole exome sequence yielded over 18,000 variants. We identified distinct mutations affecting a common amino acid in NKX2.5. Segregation analysis of the families support the pathogenic role of these variants. CONCLUSION: Our study emphasizes the utility of next generation sequencing in identifying causative mutations in complex inherited cardiac disease. We also report a novel pathogenic NKX2.5 mutation.
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Aminoácidos/genética , Cardiomiopatía Dilatada/genética , Proteína Homeótica Nkx-2.5/genética , Aminoácidos/metabolismo , Cardiomiopatía Dilatada/diagnóstico por imagen , Cardiomiopatía Dilatada/patología , ADN/química , ADN/aislamiento & purificación , ADN/metabolismo , Análisis Mutacional de ADN , Muerte Súbita Cardíaca/etiología , Electrocardiografía , Femenino , Genotipo , Secuenciación de Nucleótidos de Alto Rendimiento , Humanos , Masculino , Linaje , Fenotipo , Polimorfismo de Nucleótido SimpleRESUMEN
OBJECTIVE: Many studies have reported high rates of anxiety in adults with rheumatoid arthritis (RA). The aim of this systematic review was to examine those findings and determine the overall prevalence, severity, and commonly used measures of anxiety in individuals with RA. METHODS: Six databases were searched from January 2000 without restrictions on language/location, study design, or gray literature. All identified studies that examined anxiety prevalence and severity in adults with RA, as assessed with clinical diagnostic interview and/or standardized self-report measures, were considered for inclusion. Quality assessment of included studies was conducted using a modified Newcastle-Ottawa Evaluation Scale, and the findings were synthesized via a narrative approach. RESULTS: Across the 47 studies (n = 11,085 participants), the sample size ranged from 60 to 1,321 participants with seven studies including healthy controls or groups with other health conditions. The studies were conducted across 23 countries, and anxiety prevalence ranged from 2.4% to 77%, predominantly determined with standardized self-report measures, of which Hospital Anxiety and Depression scale was used most frequently; only eight studies used a clinical diagnostic interview to confirm a specific anxiety diagnosis. Notable associations with anxiety in RA were physical disability, pain, disease activity, depression, and quality of life. CONCLUSION: The reported prevalence of anxiety in RA varied widely potentially because of use of different self-report measures and cutoff points. Such cutoff points will need to be standardized to clinical thresholds to inform appropriate interventions for anxiety comorbidity in RA.
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Artritis Reumatoide , Calidad de Vida , Adulto , Humanos , Prevalencia , Artritis Reumatoide/diagnóstico , Artritis Reumatoide/epidemiología , Ansiedad/diagnóstico , Ansiedad/epidemiología , Comorbilidad , Depresión/diagnóstico , Depresión/epidemiologíaRESUMEN
A case report of in vivo hemolysis in a female patient with Evans syndrome is described. The patient was admitted with anemia and jaundice and, during her 26-day hospital admission, had 83 samples taken for biochemistry analyses. The laboratory hemolytic index (HI) was frequently elevated due to persistent complement-mediated in vivo hemolysis despite multiple lines of therapy. Initially, the release of many biochemical parameters was blocked per the manufacturer´s recommendations and reported as "sample hemolyzed". The patient developed severe acute kidney injury, ultimately requiring dialysis. Automated and timely reporting of indicative creatinine and other biochemical results in the context of ongoing hemolysis, therefore, became essential to patient care. Following a review of literature from various sources, a laboratory algorithm was designed to ensure the timely release of numerical biochemical values, where possible, with appropriate interpretative comments appended. Biochemistry, hematology, and nephrology teams were in regular communication to ensure patient samples were rapidly identified, analyzed and validated according to the algorithm, informing timely, safe and appropriate patient care. Ultimately, the patient died due to multiple disease- and treatment-related complications. In conjunction with clinical users, laboratories should plan for situations, such as in vivo hemolysis, where significant unavoidable interferences in biochemistry methodologies may occur in an ongoing manner for certain patients. Reporting categorical or best-estimate biochemistry results in such cases can be safer for patients than failing to report any results. Interpretation of these results by clinical teams requires input from appropriately trained and qualified laboratory personnel.
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Anemia Hemolítica Autoinmune , Trombocitopenia , Humanos , Femenino , Hemólisis , Anemia Hemolítica Autoinmune/diagnóstico , Trombocitopenia/diagnóstico , Pruebas HematológicasRESUMEN
AIMS: Diagnosis of hydatidiform mole or molar pregnancy based on morphology alone can be challenging, particularly in early gestation, necessitating the use of ancillary techniques for accurate diagnosis. We sought to adapt the VENTANA HER2 dual-colour dual-hapten in-situ hybridisation (D-DISH) assay by using the internal chromosome 17 enumeration probe to determine ploidy status. METHODS: We selected 25 products of conception, consisting of molar and non-molar cases, to validate the HER2 D-DISH assay. These cases had prior morphological assessment by a perinatal pathologist and ploidy analysis using molecular cytogenetics. Three independent observers, blinded to the original histopathological and genetic diagnosis, scored 10 representative areas on each slide. Interobserver variability was assessed by comparing the total scores of each observer using analysis of variance (ANOVA) and the kappa statistic. RESULTS: Our ploidy scoring system accurately determined the correct number of diploid and triploid conceptuses, demonstrating complete concordance with pre-existing ploidy status and the initial diagnosis. Interobserver agreement between three independent scorers was robust: ANOVA (p=0.36) and kappa statistic (0.812, p<0.001). We achieved clear separation of average nuclear signals for diploid and triploid conceptuses, which was statistically significant (p<0.05). Employing our innovative scoring system, known as the 'rule of 5', we established ploidy decision thresholds for all 25 cases. CONCLUSIONS: Our modified HER2 D-DISH ploidy assay simplifies the process of ploidy determination and improves the accuracy of morphological diagnosis of molar pregnancy. The HER2 D-DISH assay was selected for ploidy analysis due to the widespread availability of in-situ hybridisation in pathology laboratories.
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AIMS: A hydatidiform mole (HM) is classified as complete (CHM) or partial (PHM) based on its morphology and genomic composition. Ancillary techniques are often required to confirm a morphologically suspected PHM diagnosis. This study sought to evaluate the clinical accuracy of PHM diagnosis using morphological assessment supported by HER2 dual-colour dual-hapten in situ hybridisation (D-DISH) ploidy determination. METHODS: Over a 2-year period, our unit examined 1265 products of conception (POCs) from which 103 atypical POCs were diagnosed as PHM or non-molar conceptuses with the assistance of HER2 D-DISH ploidy analysis. We retrospectively audited a sample of 40 of these atypical POCs using short tandem repeat genotyping. DNA extracted from formalin-fixed paraffin-embedded tissue was genotyped using 24 polymorphic loci. Parental alleles in placental villi were identified by comparison to those in maternal decidua. To identify triploid PHM cases, we sought three alleles of equal peak height or two alleles with one allele peak twice the height of the other at each locus. RESULTS: Thirty-six of the 40 cases (19 PHM and 17 non-molar) were successfully genotyped and demonstrated complete concordance with the original diagnosis. All PHMs were diandric triploid of dispermic origin. In two non-molar diploid cases, we identified suspected trisomies (13 and 18), which potentially explains the pregnancy loss in these cases. CONCLUSIONS: This study validates the use of HER2 D-DISH ploidy analysis to support the diagnosis of a morphologically suspected PHM in our practice.
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AIMS: This study aimed to re-evaluate the incidence of hydatidiform mole (HM) and determine gestational trophoblastic disease (GTD) registration rates in Ireland following the establishment of the National GTD Registry in 2017. METHODS: We performed a 3-year retrospective audit of HM cases (January 2017 to December 2019) reported in our centre. In 2019, we surveyed Irish pathology laboratories to determine the number of HMs diagnosed nationally and compared this data to that recorded in the National GTD Registry. Additionally, we compared both local and national HM incidence rates to those reported internationally. RESULTS: In the 3-year local audit, we identified 87 HMs among 1856 products of conception (POCs) providing a local HM incidence rate of 3.92 per 1000 births. The 1-year pathology survey recorded 170 HMs in 6008 POCs, yielding a national incidence rate of 2.86 per 1000 births. Importantly, the local HM incidence rate exceeded the national incidence rate by 37% and the local partial HM incidence (1 in 296 births) was 64% higher than the nationally incidence rate (1 in 484 births). Notably, 42% of the HM and atypical POCs diagnosed nationally were not reported to the National GTD Registry. CONCLUSIONS: Our study reveals increased HM incidence rates both locally and nationally compared with previous Irish studies. The higher local PHM incidence may reflect more limited access to ploidy analysis in other pathology laboratories nationally. Significantly, almost half of the women with diagnosed or suspected HM were not registered with the National GTD Centre.
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INTRODUCTION: Capillary blood collection, a technique traditionally used in diabetes care, shows promise for many applications including pregnancy monitoring. Serial measurement of serum human Chorionic Gonadotrophin (hCG) is frequently necessary for managing early pregnancy, including molar pregnancy, requiring multiple visits to a maternity hospital for blood collection by venepuncture. This proof-of-concept study aimed to assess the clinical performance and user acceptability of capillary blood samples collected remotely, as an alternative to venous blood for hCG measurement. METHODS: Women attending the early pregnancy unit who required serum hCG measurement, were invited to participate. Following informed written consent, participants were shown how to collect capillary blood samples using the Mini-Collect® collection device. Matched venous and capillary blood samples were collected in clinic for hCG comparison purposes. Participants were also supplied with a home collection kit in a prepaid return envelope. They were asked to perform a finger-prick blood collection at home using the instructions provided and to return the capillary blood sample by post within 24 h of collection, along with a completed user-satisfaction questionnaire. Statistical analysis was performed using Analyse-it® software. RESULTS: The study enrolled 71 participants and over a third of these women collected a capillary blood sample at home. The median age of participants was 33 years (range 29-36). Passing-Bablok linear regression (y = -0.037 + 1.04x) and Spearman correlation (r = 0.999, p < 0.0001), demonstrated good agreement and strong correlation between venous and capillary samples, over a broad range of hCG values (1.2 to 224,0000 IU/L). The majority of capillary samples collected remotely (39%, 27/69) had sufficient blood volume for analysis (74%, 20/27). Respondents (77%, 18/25) found the collection device easy to use and expressed willingness to use a future service if available (80%, 20/25) CONCLUSION: The study demonstrated excellent agreement between the hCG results obtained from both collection methods, suggesting that capillary blood can serve as a reliable alternative for venous hCG measurement, particularly in clinical settings requiring frequent hCG monitoring. Feedback from the study questionnaire indicates a preference for this type of follow-up among women, indicating potential improvements in compliance for blood based diagnostic tests.