{"id":8734,"date":"2026-09-28T17:42:35","date_gmt":"2026-09-28T17:42:35","guid":{"rendered":"https:\/\/neuropediatoolkit.org\/?p=8734"},"modified":"2026-09-28T17:45:35","modified_gmt":"2026-09-28T17:45:35","slug":"raquitismo-y-salud-osea-en-errores-del-metabolismo-y-enfermedades-geneticas","status":"publish","type":"post","link":"https:\/\/neuropediatoolkit.org\/fr\/raquitismo-y-salud-osea-en-errores-del-metabolismo-y-enfermedades-geneticas\/","title":{"rendered":"Rachitisme et sant\u00e9 osseuse dans les erreurs m\u00e9taboliques et les maladies g\u00e9n\u00e9tiques."},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"457\" height=\"322\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-8.png\" alt=\"\" class=\"wp-image-8738\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-8.png 457w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-8-17x12.png 17w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-8-300x211.png 300w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"680\" height=\"817\" src=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-7.png\" alt=\"\" class=\"wp-image-8736\" srcset=\"https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-7.png 680w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-7-10x12.png 10w, https:\/\/neuropediatoolkit.org\/wp-content\/uploads\/2026\/09\/image-7-250x300.png 250w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">El diagn\u00f3stico diferencial del raquitismo frente a errores innatos del metabolismo y trastornos gen\u00e9ticos requiere evaluar marcadores bioqu\u00edmicos clave, especialmente la <strong>fosfatasa alcalina (FA) s\u00e9rica<\/strong>, el <strong>fosfato<\/strong> et le <strong>calcium<\/strong>, ya que muchas condiciones raras imitan la presentaci\u00f3n cl\u00ednica y radiol\u00f3gica del raquitismo nutricional com\u00fan.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Diagn\u00f3stico Diferencial Clave<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hipofosfatasia (HPP):<\/strong>\n<ul class=\"wp-block-list\">\n<li><em>Tipo:<\/em> Error innato del metabolismo causado por mutaciones en el gen <em>ALPL<\/em> (deficiencia de la fosfatasa alcalina inespec\u00edfica de tejido).<\/li>\n\n\n\n<li><em>Signo distintivo:<\/em> <strong>Niveles parad\u00f3jicamente bajos de FA s\u00e9rica<\/strong> (mientras que el raquitismo com\u00fan la eleva marcadamente), acompa\u00f1ados de elevaci\u00f3n de fosfoetanolamina, riesgo de convulsiones e hipomineralizaci\u00f3n \u00f3sea grave.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Raquitismo Hipofosfat\u00e9mico Hereditario:<\/strong>\n<ul class=\"wp-block-list\">\n<li><em>Tipo:<\/em> Trastorno gen\u00e9tico de p\u00e9rdida renal de fosfato (ej. ligado al cromosoma X por mutaciones en <em>PHEX<\/em>, o formas autos\u00f3micas relacionadas con <em>FGF23<\/em> o <em>DMP1<\/em>).<\/li>\n\n\n\n<li><em>Signo distintivo:<\/em> <strong>Hipofosfatemia<\/strong> severa con niveles de 1,25-dihidroxivitamina D bajos o normales-bajos y FA elevada, pero con <strong>niveles normales de 25-hidroxivitamina D<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rachitisme d\u00e9pendant de la vitamine D (VDDR) :<\/strong>\n<ul class=\"wp-block-list\">\n<li><em>Types 1A\/1B :<\/em> Erreurs g\u00e9n\u00e9tiques dans la synth\u00e8se ou la bioactivation de la vitamine D (fautes enzymatiques comme le d\u00e9ficit de l'1\u03b1-hydroxylase r\u00e9nale).<\/li>\n\n\n\n<li><em>2A\/2B :<\/em> Mutation dans le r\u00e9cepteur de la vitamine D (VDR).<\/li>\n\n\n\n<li><em>Signo distintivo:<\/em> Le type 2 pr\u00e9sente des niveaux extr\u00eamement \u00e9lev\u00e9s de 1,25(OH)\u2082D circulants et fr\u00e9quemment associ\u00e9 \u00e0 <strong>total alop\u00e9xia<\/strong>, ce qui le distingue du raquitisme classique et du type 1.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Syndrome de Fanconi (Acidose tubulaire r\u00e9nale \/ Tubulopatie proximale)<\/strong>\n<ul class=\"wp-block-list\">\n<li><em>Tipo:<\/em> D\u00e9ficit g\u00e9n\u00e9ralis\u00e9 du t\u00fabulo contorneau proximal, qui peut \u00eatre h\u00e9r\u00e9ditaire (secondary \u00e0 cystinose, maladie de Wilson, etc.) ou acquis.<\/li>\n\n\n\n<li><em>Signo distintivo:<\/em> Perte massive d'acide phosphorique, de glucose, d'aminoacides et de bicarbonate urinaire, provoquant une acidose syst\u00e9mique et une d\u00e9min\u00e9ralisation osseuse hypophosphat\u00e9mique.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Displasies osseuses et maladies de stockage :<\/strong>\n<ul class=\"wp-block-list\">\n<li><em>Displastie m\u00e9topique de Jansen :<\/em> Condition autistique dominante rare qui imite les alterations m\u00e9taboliques du raquitisme.<\/li>\n\n\n\n<li><em>Mucopolysaccharidose :<\/em> Peu de fois, les d\u00e9formit\u00e9s osseuses peuvent \u00eatre confondues avec le raquitisme d\u00e8s les \u00e9tapes pr\u00e9coce.<\/li>\n\n\n\n<li><em>Osteog\u00e9n\u00e8se imperfecte :<\/em> D\u00e9fauts du collag\u00e8ne qui provoquent des fractures fr\u00e9quentes et une fragilit\u00e9 osseuse, simulant parfois un raquitisme grave.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9tape de cribage diagnostique strat\u00e9gique<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>D\u00e9terminer <strong>calcium, phosphore, magnesium et FA en sangr\u00e9<\/strong>.<\/li>\n\n\n\n<li>Mesurer <strong>25-hydroxyvitamine D<\/strong> y <strong>1,25-Dihydroxyvitamine D<\/strong>.<\/li>\n\n\n\n<li>\u00c9valuer la <strong>fonction r\u00e9nale tubulaire<\/strong> (urine phosphate, aminoacids, glucose and blood\/urine pH) pour \u00e9carter le syndrome de Fanconi ou une perte isol\u00e9e de phosphate.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>Le diagnostic diff\u00e9rentiel du rachitisme par rapport aux erreurs inn\u00e9es du m\u00e9tabolisme et aux troubles g\u00e9n\u00e9tiques n\u00e9cessite l'\u00e9valuation de marqueurs biochimiques cl\u00e9s, en particulier la phosphatase alcaline s\u00e9rique (ALP), le phosphate et le calcium, car de nombreuses affections rares imitent la pr\u00e9sentation clinique et radiologique du rachitisme nutritionnel courant. Diagnostic diff\u00e9rentiel cl\u00e9 Strat\u00e9gie de d\u00e9pistage diagnostique de base<\/p>","protected":false},"author":1,"featured_media":8739,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8734","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","entry"],"_links":{"self":[{"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/posts\/8734","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/comments?post=8734"}],"version-history":[{"count":2,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/posts\/8734\/revisions"}],"predecessor-version":[{"id":8740,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/posts\/8734\/revisions\/8740"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/media\/8739"}],"wp:attachment":[{"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/media?parent=8734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/categories?post=8734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/neuropediatoolkit.org\/fr\/wp-json\/wp\/v2\/tags?post=8734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}