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Tétrapyrroles
Tétrapyrroles : Questions médicales fréquentes
Termes MeSH sélectionnés :
Diagnostic
5
Porphyries
Tests de laboratoire
Porphyries
Analyse d'urine
Tests génétiques
Porphyries
Antécédents médicaux
Évaluation clinique
Symptômes
5
Neuropathies
Troubles mentaux
Troubles digestifs
Symptômes
Photosensibilité
Éruptions cutanées
Prévention
5
Dépistage
Antécédents familiaux
Éducation des patients
Gestion des symptômes
Suivi médical
Traitements
Traitements
5
Suppléments de fer
Anémie
Gestion du stress
Qualité de vie
Complications
5
Troubles psychologiques
Anxiété
Foie
Dysfonctionnement hépatique
Complications cardiovasculaires
Anémie
Infections
Système immunitaire
Facteurs de risque
5
Facteurs de risque
Antécédents familiaux
Maladies hépatiques
Facteurs de risque
Infections
Facteurs de risque
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"name": "Comment diagnostiquer une carence en tétrapyrroles ?",
"position": 1,
"acceptedAnswer": {
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"text": "Un diagnostic se fait par des tests sanguins mesurant les niveaux de porphyrines."
}
},
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"@type": "Question",
"name": "Quels examens sont utilisés pour évaluer les tétrapyrroles ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les tests de porphyrines urinaires et sanguines sont couramment utilisés."
}
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"@type": "Question",
"name": "Quels symptômes indiquent un déséquilibre des tétrapyrroles ?",
"position": 3,
"acceptedAnswer": {
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"text": "Des douleurs abdominales, des troubles neurologiques et des photosensibilités peuvent survenir."
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"@type": "Question",
"name": "Les tests génétiques sont-ils utiles pour les tétrapyrroles ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils peuvent identifier des mutations liées aux troubles des tétrapyrroles."
}
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"@type": "Question",
"name": "Quelle est l'importance de l'historique médical dans le diagnostic ?",
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"@type": "Question",
"name": "Quels sont les symptômes courants des troubles des tétrapyrroles ?",
"position": 6,
"acceptedAnswer": {
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"text": "Les symptômes incluent douleurs abdominales, éruptions cutanées et fatigue."
}
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{
"@type": "Question",
"name": "Comment les tétrapyrroles affectent-ils le système nerveux ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils peuvent provoquer des neuropathies, des crises et des troubles mentaux."
}
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{
"@type": "Question",
"name": "Les troubles digestifs sont-ils liés aux tétrapyrroles ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des douleurs abdominales et des nausées sont fréquentes dans ces troubles."
}
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"@type": "Question",
"name": "La photosensibilité est-elle un symptôme des tétrapyrroles ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la photosensibilité est un symptôme courant, provoquant des éruptions cutanées."
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"@type": "Question",
"name": "Les symptômes varient-ils selon le type de tétrapyrroles ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les symptômes peuvent varier selon le type de porphyrie et sa gravité."
}
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"@type": "Question",
"name": "Comment prévenir les crises liées aux tétrapyrroles ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Éviter les déclencheurs connus, comme certains médicaments et l'alcool, aide à prévenir."
}
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{
"@type": "Question",
"name": "Les tests de dépistage sont-ils recommandés ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le dépistage peut être utile pour les personnes à risque ou avec des antécédents familiaux."
}
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"@type": "Question",
"name": "L'éducation des patients est-elle importante ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, comprendre la maladie aide les patients à gérer leurs symptômes et à éviter les crises."
}
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"@type": "Question",
"name": "Les vaccinations sont-elles nécessaires pour ces patients ?",
"position": 14,
"acceptedAnswer": {
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"text": "Oui, les vaccinations peuvent prévenir des infections qui aggravent les symptômes."
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"text": "Ils peuvent être nécessaires en cas d'anémie, mais doivent être prescrits par un médecin."
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"acceptedAnswer": {
"@type": "Answer",
"text": "La gestion du stress peut réduire les crises et améliorer la qualité de vie."
}
},
{
"@type": "Question",
"name": "Les changements alimentaires sont-ils bénéfiques ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, un régime équilibré peut aider à gérer les symptômes et améliorer la santé."
}
},
{
"@type": "Question",
"name": "Quelles sont les complications possibles des tétrapyrroles ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les complications incluent des lésions nerveuses, des problèmes hépatiques et des anémies."
}
},
{
"@type": "Question",
"name": "Les troubles psychologiques sont-ils des complications ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des troubles comme l'anxiété et la dépression peuvent survenir chez ces patients."
}
},
{
"@type": "Question",
"name": "Comment les tétrapyrroles affectent-ils le foie ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils peuvent provoquer des lésions hépatiques, entraînant des douleurs et des dysfonctionnements."
}
},
{
"@type": "Question",
"name": "Les complications cardiovasculaires sont-elles possibles ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des problèmes cardiovasculaires peuvent survenir en raison de l'anémie et du stress."
}
},
{
"@type": "Question",
"name": "Les infections sont-elles une complication fréquente ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les infections peuvent survenir, surtout si le système immunitaire est affaibli."
}
},
{
"@type": "Question",
"name": "Quels sont les facteurs de risque des troubles des tétrapyrroles ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les antécédents familiaux, l'exposition à des toxines et certains médicaments augmentent le risque."
}
},
{
"@type": "Question",
"name": "L'alimentation joue-t-elle un rôle dans les tétrapyrroles ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une alimentation pauvre en nutriments essentiels peut augmenter le risque de troubles."
}
},
{
"@type": "Question",
"name": "Les maladies hépatiques sont-elles un facteur de risque ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les maladies hépatiques préexistantes peuvent exacerber les troubles des tétrapyrroles."
}
},
{
"@type": "Question",
"name": "Le stress peut-il aggraver les symptômes ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le stress est un facteur déclenchant connu pour les crises liées aux tétrapyrroles."
}
},
{
"@type": "Question",
"name": "Les infections antérieures influencent-elles le risque ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines infections peuvent déclencher ou aggraver les troubles des tétrapyrroles."
}
}
]
}
]
}
Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale
Validation scientifique effectuée le 19/04/2025
Contenu vérifié selon les dernières recommandations médicales
6 publications dans cette catégorie
Affiliations :
Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstraße 13, Berlin, 10115, Germany.
5 publications dans cette catégorie
Affiliations :
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
Publications dans "Tétrapyrroles" :
4 publications dans cette catégorie
Affiliations :
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
Publications dans "Tétrapyrroles" :
4 publications dans cette catégorie
Affiliations :
Department of Chemistry and Biochemistry, Brown Laboratory, University of Delaware, Newark, DE 19716, USA. joelr@udel.edu.
Publications dans "Tétrapyrroles" :
3 publications dans cette catégorie
Affiliations :
Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstraße 13, Berlin, 10115, Germany.
Publications dans "Tétrapyrroles" :
3 publications dans cette catégorie
Affiliations :
Chair of Technical Electrochemistry, Department of Chemistry and Catalysis Research Center, Technische Universität München (TUM), 85748, Garching, Germany.
Publications dans "Tétrapyrroles" :
3 publications dans cette catégorie
Affiliations :
Bundesanstalt für Materialforschung und -prüfung (BAM), 12203, Berlin, Germany.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstraße 13, Berlin, 10115, Germany.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam-Golm, Germany.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, University of California, Riverside, CA 92521-0403, USA.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, Washington University, St. Louis, MO 63130-4889, USA. holten@wustl.edu.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, University of California, Riverside, CA 92521-0403, USA.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, Washington University, St. Louis, MO 63130-4889, USA. holten@wustl.edu.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695-7612, USA.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Institute of Biology/Plant Physiology, Humboldt-Universität zu Berlin, Philippstraße 13 (Haus 12), 10115 Berlin, Germany.
Publications dans "Tétrapyrroles" :
2 publications dans cette catégorie
Affiliations :
Humboldt-Universität zu Berlin, Institute of Biology/Plant Physiology, Philippstraße 13, Building 12,, D-10115, Berlin, Germany.
Publications dans "Tétrapyrroles" :
Multiple sclerosis (MS) is an inflammatory demyelinating disease. Auditory evoked potential studies have demonstrated conduction and neural processing deficits in adults with MS, but little is known a...
to evaluate the central auditory pathway with brainstem auditory evoked potentials (BAEP) and long-latency auditory evoked potentials (LLAEP) in children and adolescents with MS....
The study comprised 17 individuals with MS, of both sexes, aged 9 to 18 years, and 17 healthy volunteers, matched for age and sex. All individuals had normal hearing and no middle ear impairments. The...
Abnormal responses were observed in 60% of electrophysiologic assessments of individuals with MS. In BAEP, 58.82% of MS patients had abnormal responses, with longer wave V latency and therefore longer...
Children and adolescents with MS had abnormal BAEP responses, with delayed neural conduction between the cochlear nucleus and the lateral lemniscus. Also, abnormal LLAEP results suggest a decrease in ...
When a person listens to sound, the brain time-locks to specific aspects of the sound. This is called neural tracking and it can be investigated by analysing neural responses (e.g., measured by electr...
To analyze age-related changes in the central auditory pathway in healthy elderly individuals....
A prospective, quantitative cross-sectional study. The caseload comprised 18 adults (mean age, 22.78 years) and 18 elderly individuals (mean age, 66.72 years) of both sexes, who met inclusion criteria...
Elderly individuals had higher wave and interpeak latencies (waves I, III and V and interpeaks I-V and III-V) of brainstem auditory evoked potential. Latencies of frequency following response waves A,...
Brainstem auditory evoked potential and frequency-following response allowed appropriate assessment of age-related changes in the auditory pathway. Slower neural response to auditory stimuli suggests ...
To investigate the functionalities of the neural pathways through the auditory evoked potentials of the brainstem and the contralateral stapedial acoustic reflexes in normal-hearing individuals with t...
This is a cross-sectional study with a comparison group and a convenience sample, consisting of 32 individuals with type 1 diabetes mellitus and 20 controls without the disease. All subjects had heari...
The auditory thresholds of the acoustic reflex were statistically lower in the group with the disease at frequencies of 0.5 kHz and 1.0 kHz in the left ear (p=0.01 and p=0.01, respectively). The absol...
The findings suggest that subjects with type 1 diabetes mellitus are more likely to present alterations in the central auditory pathways, even with auditory thresholds within normal limits....
To investigate the evaluation value of electrically evoked auditory brainstem response (EABR) monitoring before cochlear implantation in patients with cochlear nerve defects (CND)....
A total of 54 patients with cochlear nerve defects who underwent cochlear implantation in our hospital from 2011 to 2018 were selected as the CND group, and 20 patients with normal cochlear implantati...
The EABR waveform of the CND group was significantly different from the control group in terms of average wave V threshold, average dynamic range and V-wave I/O curve slope (P < 0.05). Average C value...
The EABR test can be used to evaluate the auditory pathway function before cochlear implantation and its postoperative effect in patients with CND....
To characterize the peripheral and central auditory pathways in individuals with Acute Lymphoid Leukemia (ALL) and compare assessment results before and during chemotherapy....
The study included 17 subjects with ALL, divided into two age groups: 3 to 6 (11 individuals) and 7 to 16 years old (6 individuals). Each subject was evaluated twice (before and 3 to 6 months after ch...
PTA was normal. Tympanometry was abnormal in the second assessment in 2 individuals aged 3 to 6 years. One subject in each age group had absent ipsilateral acoustic reflexes. In high-frequency audiome...
No hearing loss was identified in the behavioral audiological assessment. BAEP was more affected in the 3-to-6-year-old group, with greater impairment in the lower brainstem in the first and second as...
Congenital cytomegalovirus infection (cCMVi) is a leading cause of sensorineural hearing loss (SNHL) and developmental delay. Brainstem auditory evoked potentials (BAEPs) recording allows assessment o...
As the world becomes more urbanized, more people become exposed to traffic and the risks associated with a higher exposure to road traffic noise increase. Excessive exposure to environmental noise cou...
The human auditory system extracts rich linguistic abstractions from speech signals. Traditional approaches to understanding this complex process have used linear feature-encoding models, with limited...
Subjective promontory stimulation is used to evaluate cochlear implant (CI) candidacy, but the test reliability is low. Electrically evoked auditory brainstem response (EABR) can verify the function o...
We hypothesised that LA-TT-EABR waveforms of good quality would be related to successful hearing outcomes. We assumed that the duration of hearing loss/deafness was a confounding factor to study outco...
19 borderline CI candidates....
Positive LA-TT-EABR results were confirmed in 14 patients. LA-TT-EABR's mean latency was 2.05 ± 0.31 ms (eII/eIII) and 4.24 ± 0.39 ms (eIV/eV). Latencies weren't statistically different from intra-ope...
LA-TT-EABR is a tool in the frame of pre-operative objective testing the auditory pathway. It seems useful for clinical testing CI candidacy. Based on this study's outcomes, LA-TT-EABR should be recom...