Titre : Faux positifs

Faux positifs : Questions médicales fréquentes

Termes MeSH sélectionnés :

Prostatic Neoplasms
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"MedicalWebPage", "name": "Diagnostic", "headline": "Diagnostic sur Faux positifs", "description": "Qu'est-ce qu'un faux positif en médecine ?\nComment se produisent les faux positifs ?\nQuels tests sont souvent sujets aux faux positifs ?\nComment confirmer un faux positif ?\nLes faux positifs peuvent-ils être dangereux ?", "url": "https://questionsmedicales.fr/mesh/D005189?mesh_terms=Prostatic+Neoplasms&page=2#section-diagnostic" }, { "@type": "MedicalWebPage", "name": "Symptômes", "headline": "Symptômes sur Faux positifs", "description": "Quels symptômes peuvent être mal interprétés ?\nLes faux positifs causent-ils des symptômes ?\nComment les faux positifs affectent-ils le diagnostic ?\nLes faux positifs sont-ils fréquents ?\nPeut-on avoir des faux positifs sans symptômes ?", "url": "https://questionsmedicales.fr/mesh/D005189?mesh_terms=Prostatic+Neoplasms&page=2#section-symptômes" }, { "@type": "MedicalWebPage", "name": "Prévention", "headline": "Prévention sur Faux positifs", 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risque" } ] }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Qu'est-ce qu'un faux positif en médecine ?", "position": 1, "acceptedAnswer": { "@type": "Answer", "text": "C'est un résultat de test qui indique une maladie alors qu'elle n'est pas présente." } }, { "@type": "Question", "name": "Comment se produisent les faux positifs ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Ils peuvent résulter d'erreurs de test, de spécificité insuffisante ou d'interférences." } }, { "@type": "Question", "name": "Quels tests sont souvent sujets aux faux positifs ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Les tests de dépistage du cancer, les tests allergiques et les tests de grossesse." } }, { "@type": "Question", "name": "Comment confirmer un faux positif ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Des tests supplémentaires ou des examens cliniques peuvent aider à confirmer ou infirmer le résultat." } }, { "@type": "Question", "name": "Les faux positifs peuvent-ils être dangereux ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Oui, ils peuvent entraîner des traitements inutiles et de l'anxiété pour le patient." } }, { "@type": "Question", "name": "Quels symptômes peuvent être mal interprétés ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes comme la douleur ou la fatigue peuvent être associés à des faux positifs." } }, { "@type": "Question", "name": "Les faux positifs causent-ils des symptômes ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Non, les faux positifs ne causent pas de symptômes, mais peuvent mener à des traitements inappropriés." } }, { "@type": "Question", "name": "Comment les faux positifs affectent-ils le diagnostic ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Ils peuvent mener à des diagnostics erronés et à des traitements non nécessaires." } }, { "@type": "Question", "name": "Les faux positifs sont-ils fréquents ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "La fréquence varie selon le test, mais certains tests de dépistage ont des taux élevés." } }, { "@type": "Question", "name": "Peut-on avoir des faux positifs sans symptômes ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Oui, un faux positif peut survenir sans que le patient ne présente de symptômes." } }, { "@type": "Question", "name": "Comment réduire les faux positifs ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Utiliser des tests avec une haute spécificité et valider les résultats par des tests complémentaires." } }, { "@type": "Question", "name": "Les antécédents médicaux aident-ils à prévenir les faux positifs ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des antécédents médicaux complets peuvent aider à interpréter les résultats de tests." } }, { "@type": "Question", "name": "Les faux positifs peuvent-ils être évités par des tests réguliers ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Des tests réguliers et appropriés peuvent aider à minimiser les faux positifs." } }, { "@type": "Question", "name": "Quel rôle joue la formation des professionnels de santé ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Une formation adéquate aide à interpréter correctement les résultats et à éviter les erreurs." } }, { "@type": "Question", "name": "Les nouvelles technologies aident-elles à prévenir les faux positifs ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les avancées technologiques améliorent la précision des tests et réduisent les faux positifs." } }, { "@type": "Question", "name": "Comment gérer un faux positif ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Il est essentiel de réaliser des tests de confirmation et d'évaluer le patient cliniquement." } }, { "@type": "Question", "name": "Les faux positifs nécessitent-ils un traitement ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Non, un faux positif ne nécessite pas de traitement, mais une évaluation supplémentaire." } }, { "@type": "Question", "name": "Quels traitements peuvent être évités à cause des faux positifs ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Des traitements comme la chimiothérapie ou des interventions chirurgicales peuvent être évités." } }, { "@type": "Question", "name": "Les faux positifs influencent-ils le suivi médical ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Oui, ils peuvent entraîner des suivis médicaux inutiles et des examens supplémentaires." } }, { "@type": "Question", "name": "Comment éviter les traitements inappropriés ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "En confirmant les résultats par des tests supplémentaires avant de commencer un traitement." } }, { "@type": "Question", "name": "Quelles complications peuvent découler des faux positifs ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Les complications incluent des traitements inutiles, des effets secondaires et de l'anxiété." } }, { "@type": "Question", "name": "Les faux positifs peuvent-ils entraîner des diagnostics tardifs ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des faux positifs peuvent retarder le diagnostic correct d'une maladie réelle." } }, { "@type": "Question", "name": "Comment les faux positifs affectent-ils la confiance des patients ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Ils peuvent diminuer la confiance des patients dans les tests et les professionnels de santé." } }, { "@type": "Question", "name": "Les faux positifs augmentent-ils les coûts de santé ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Oui, ils peuvent entraîner des coûts supplémentaires en raison de tests et traitements inutiles." } }, { "@type": "Question", "name": "Les faux positifs peuvent-ils causer des problèmes psychologiques ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'anxiété et le stress liés à des résultats erronés peuvent affecter la santé mentale." } }, { "@type": "Question", "name": "Quels facteurs augmentent le risque de faux positifs ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Des facteurs comme l'âge, le sexe et des conditions médicales préexistantes peuvent influencer." } }, { "@type": "Question", "name": "Les tests de dépistage sont-ils plus risqués pour certains groupes ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains groupes peuvent avoir des taux de faux positifs plus élevés selon le test." } }, { "@type": "Question", "name": "Les antécédents familiaux influencent-ils les faux positifs ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des antécédents familiaux de maladies peuvent augmenter le risque de faux positifs." } }, { "@type": "Question", "name": "Le mode de vie affecte-t-il les faux positifs ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des habitudes comme le tabagisme ou l'alimentation peuvent influencer les résultats." } }, { "@type": "Question", "name": "Les médicaments peuvent-ils causer des faux positifs ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains médicaments peuvent interférer avec les tests et provoquer des faux positifs." } } ] } ] }

Sources (10000 au total)

Presence of HPV in prostate tissue from patients submitted to prostate biopsy.

Prostate cancer (PCa) is the second most frequent cancer among men in the Western population. Infections, such as the one caused by the human papillomavirus (HPV), have been shown to promote inflammat... Prostate tissue fragments were collected by prostate biopsy and subjected to polymerase chain reaction with primers for the HPV L1 gene to identify the presence of the virus.... Among 162 patients, 10 (6.2%) had HPV and in 152 (93.8%) HPV was not identified in prostate biopsies. HPV was detected in 7/95 (7.4%) of patients with PCa, in 2/55 (3.6%) of patients without PCa, and ... There were no significant levels of HPV L1 protein in prostate tissue. The findings suggest the absence of HPV oncogenic activity in the prostate tissue of patients with PCa....

Total Prostate Specific Antigen in Prostate Cancer Screening in Hyperglycemic Individuals.

In this study, it was aimed to investigate the reliability of total prostate-specific antigen (t-PSA) in prostate cancer screening in hyperglycemic (≥126 mg/dL) individuals.... This research was planned as a cross-sectional retrospective study. Three hundred eleven cases which underwent biopsy with the suspicion of prostate cancer in the hospital were included in the study. ... It was determined that the t-PSA measurement was higher in the patient group with cancer (P < .001). It was determined that the median t-PSA levels of the intermediate and high cancer groups were high... As a contribution to literature, we found that the t-PSA test lost its sensitivity in cases with plasma glucose levels above normal. Loss of sensitivity may result in underdiagnosis in prostate cancer...

Automatic detection of prostate cancer grades and chronic prostatitis in biparametric MRI.

With emerging evidence to improve prostate cancer (PCa) screening, multiparametric magnetic prostate imaging is becoming an essential noninvasive component of the diagnostic routine. Computer-aided di... We collected 1647 fine-grained biopsy-confirmed findings, including Gleason scores and prostatitis, to form a training dataset. In our experimental framework for lesion detection, all models utilized ... An optimal model configuration with fine class granularity (prostatitis included) and OHE has scored the lesion-wise partial Free-Response Receiver Operating Characteristic (FROC) area under the curve... This paper examines several configurations for model training in the biparametric MRI setup and proposes optimal value ranges. It also shows that the fine-grained class configuration, including prosta...

Is systematic prostate biopsy an overkill in metastatic prostate carcinoma ? A prospective validation.

To assess the efficacy of 2-core prostate biopsy in advanced prostate cancer patients. This included a retrospective analysis of 12-core prostate biopsies and a prospective validation that a reduced n... The first phase analyzed retrospective data from 12-core prostate biopsies between January 2013 and 2018. In the second phase, from January 2018 to January 2022, in a prospective setting, patients wit... In the retrospective analysis, the number of positive cores in metastatic disease was 12 in 93 (73.8%), 11 in 14 (11.1%), and 10 in 7 (5.6%) patients. Using probability analysis, 94% of patients with ... A 2-core biopsy is adequate in almost all patients with metastatic prostate cancer with PSA > 75, and this avoids excess complications and morbidity associated with a systematic 12-core prostate biops...

Prostate cancer aggressiveness and financial toxicity among prostate cancer patients.

Financial toxicity (FT) is a growing concern among cancer survivors that adversely affects the quality of life and survival. Individuals diagnosed with aggressive cancers are often at a greater risk o... PCa patients enrolled in the North Carolina-Louisiana Prostate Cancer Project (PCaP) were recontacted for long-term follow-up. The prevalence of FT in the PCaP cohort was estimated. FT was estimated u... More than one-third of PCa patients reported experiencing FT. PCa aggressiveness was significantly independently associated with high FT; high aggressive PCa at diagnosis had more than twice the risk ... Aggressive PCa was associated with high FT. Future studies should collect more information about the characteristics of men with high FT and identify additional risk factors of FT....

Is prostatic adenocarcinoma with cribriform architecture more difficult to detect on prostate MRI?

Cribriform (CBFM) pattern on prostate biopsy has been implicated as a predictor for high-risk features, potentially leading to adverse outcomes after definitive treatment. This study aims to investiga... Patients who underwent multiparametric magnetic resonance imaging (mpMRI), combined 12-core transrectal ultrasound (TRUS) guided systematic (SB) and MRI/US fusion-guided biopsy were retrospectively qu... Between 2015 and 2022, a total of 131 consecutive patients with CBFM pattern on prostate biopsy and pre-biopsy mpMRI were included. Clinical feature analysis included 1572 systematic biopsy cores (114... The extent of disease for CBFM-containing tumors is difficult to capture on mpMRI. When comparing MRI lesions of similar dimensions and PIRADS scores, CBFM-containing tumors appear to have larger canc...