{"id":85997,"date":"2026-03-31T16:09:19","date_gmt":"2026-03-31T16:09:19","guid":{"rendered":"https:\/\/www.msdconnect.be\/nl\/?post_type=therapeutic-area&#038;p=85997"},"modified":"2026-09-22T16:19:52","modified_gmt":"2026-09-22T16:19:52","slug":"wat-is-blaaskanker","status":"publish","type":"therapeutic-area","link":"https:\/\/www.msdconnect.be\/nl\/therapeutic-areas\/immunotherapie-voor-de-behandeling-van-urologische-kankers\/blaaskanker\/wat-is-blaaskanker\/","title":{"rendered":"Wat is blaaskanker?"},"content":{"rendered":"\n<section class=\"mhh-mcn-v1-section mhh-mcn-v1-section--e28966a03eb61164bbe17d5d21b5fc69 mhh-mcn-section mhh-mcn-v1-section--align-full\">\n    <div class=\"mhh-mcn-container\">\n    \n<div class=\"mhh-mcn-columns mhh-mcn-columns--vertical-alignment-center mhh-mcn-v1-columns--904aae9021479eea613f07eafa134da8 mhh-mcn-v1-columns mhh-mcn-columns--gutter-custom\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--e54ebf43f0ba9c637988e5c66ccdea78 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-8 mhh-mcn-column--l-8\">\n    \n\n<h2 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-77f0067a490484ba487cb8e5e2d149ff  mhh-mcn-v1-heading mhh-mcn-v1-heading--e36bdd2e90616f92a39183edc47cea9f\" style=\"color:#812990\"><strong>Blaaskanker&nbsp;\u2014<\/strong><\/h2>\n\n\n\n<h2 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-951f39310f48c258681bb7c84ae7b3da  mhh-mcn-v1-heading mhh-mcn-v1-heading--174ec2b58574c9621353cddd5b093c85\" style=\"color:#812990\">Wat is blaaskanker?<\/h2>\n\n<\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--0ee441f161f78e45c688a31216b9698e mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-4 mhh-mcn-column--l-4\">\n    \n<figure class=\"mhh-mcn-v1-image mhh-mcn-v1-image--3145d111a8b8f07eee31d68b6484d357 mhh-mcn-v1-image--align-items-center\">\n                    <img loading=\"lazy\" decoding=\"async\"\n        class=\"mhh-mcn-image mhh-mcn-image--full wp-image-86678\"\n        src=\"https:\/\/www.msdconnect.be\/nl\/wp-content\/uploads\/sites\/34\/2026\/03\/blaas-titel-e1785404222776.png?quality=80&#038;lossy=1\"\n        width=\"1474\"\n        height=\"1267\"\n                alt=\"\"\n            \/>\n            <\/figure>\n\n<\/div>\n\n    <\/div>\n\n    <\/div>\n\n    <\/div>\n<\/section>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<section class=\"mhh-mcn-v1-section mhh-mcn-v1-section--478877234d4c899bc1fe1621aad53ca9 mhh-mcn-section mhh-mcn-v1-section--align-full\">\n    <div class=\"mhh-mcn-container\">\n    \n<div class=\"mhh-mcn-columns mhh-mcn-columns--vertical-alignment-center mhh-mcn-v1-columns--9e3a58cec7c6da42698e1b45f4225e39 mhh-mcn-v1-columns mhh-mcn-columns--gutter-m\">\n    <div class=\"mhh-mcn-columns-inner\">\n        \n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--a94b47060f45607590ea48413d988428 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-6 mhh-mcn-column--l-6\">\n    \n\n<h3 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-9946c319e1d25d860a8b9a77f4e5ca6c  mhh-mcn-v1-heading mhh-mcn-v1-heading--b67a0da0db494960aa427a77049d34e4\" style=\"color:#603c37\"><strong>Wat doet de blaas in ons lichaam?<\/strong><\/h3>\n\n\n\n<h4 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-a628c6ef90ba97ae397c2cc971c54afe  mhh-mcn-v1-heading mhh-mcn-v1-heading--0f8057cb9100f2bf0305574fead46048\" style=\"color:#943853\"><strong>Waar bevindt de blaas zich in het lichaam?<sup>1<\/sup><\/strong><\/h4>\n\n\n\n<p dir=\"ltr\" lang=\"nl-BE\" class=\"has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-66914ba3016cd334224102208c5281e5   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--8aba4feebc24a0be710713dbfd759141 wp-block-paragraph\" style=\"color:#603c37\">Je blaas bevindt zich onderaan in je buik, achter het schaambeen.<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-97877f77819ae598179d37a6817dc90f  mhh-mcn-v1-heading mhh-mcn-v1-heading--ad7d0a06d5347d95c513293e35658f55\" style=\"color:#943853\"><strong>Wat is de functie van de blaas?<sup>1-3<\/sup><\/strong><\/h4>\n\n\n\n<p dir=\"ltr\" lang=\"nl-BE\" class=\"has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-74cb21759c37222fc00aaee34bc70581   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--cc03c6d64d9eb8025dcddde668a554d5 wp-block-paragraph\" style=\"color:#603c37\">Je blaas vormt samen met je nieren, urineleiders en plasbuis je urinewegen. De nieren filteren de afvalstoffen uit het bloed en produceren zo urine, dat vanuit de nieren via twee urineleiders naar de blaas stroomt. In de blaas wordt deze urine tijdelijk opgeslagen, totdat je moet plassen, op dit moment verlaat de urine via de plasbuis het lichaam.<\/p>\n\n<\/div>\n\n\n<div class=\"mhh-mcn-v1-column mhh-mcn-v1-column--d5371ce6a3376e1c1825e00b30d1b3e6 mhh-mcn-column mhh-mcn-column--12 mhh-mcn-column--m-6 mhh-mcn-column--l-6\">\n    \n<figure class=\"mhh-mcn-v1-image mhh-mcn-v1-image--eecfb6ad7a4e8a609a6fbbee296bc681 mhh-mcn-v1-image--align-items-center\">\n                    <img decoding=\"async\"\n        class=\"mhh-mcn-image mhh-mcn-image--full wp-image-86681\"\n        src=\"https:\/\/www.msdconnect.be\/nl\/wp-content\/uploads\/sites\/34\/2026\/03\/overview-bladder-nl-e1785405648244.png?quality=80&#038;lossy=1\"\n        width=\"2000\"\n        height=\"2526\"\n        loading=\"lazy\"        alt=\"\"\n            \/>\n            <\/figure>\n\n<\/div>\n\n    <\/div>\n\n    <\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-aa9672993bdf3ed793f9879318551129  mhh-mcn-v1-heading mhh-mcn-v1-heading--8bf78ce0ef22267dac7c32aa25ab6921\" style=\"color:#603c37\"><strong>Hoe ontwikkelt blaaskanker zich?<\/strong><\/h3>\n\n\n\n<h4 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-14a902110ac6f19b2b0c1fb18e1e7c6b  mhh-mcn-v1-heading mhh-mcn-v1-heading--e768fd7884e02ec75c97b40482c1ecfb\" style=\"color:#943853\"><strong>Hoe ontstaat kanker?<sup>4<\/sup><\/strong><\/h4>\n\n\n\n<p dir=\"ltr\" lang=\"nl-BE\" class=\"has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-860f87c6645f96a542e39a5ff0dfbe85   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--69457a58cfbc6b586e7a69d983d487dd wp-block-paragraph\" style=\"color:#603c37\">Kanker wordt veroorzaakt door een cel van het lichaam die zich abnormaal gedraagt en ongecontroleerd begint te vermenigvuldigen (woekeren). Het verschil met een goedaardige tumor is dat bij kanker deze cel ook de omliggende weefsels kan binnendringen of zich kan verspreiden naar andere organen in het lichaam waar ze niet thuis hoort (uitzaaiingen).<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 dir=\"ltr\" lang=\"nl-BE\" class=\"wp-block-heading has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-804c01b165e2b0cddc4b4d782352633b  mhh-mcn-v1-heading mhh-mcn-v1-heading--2c6d5a34eef1751e51db2dfb73c42dcc\" style=\"color:#603c37\"><strong>Vanuit welk type cellen ontstaat blaaskanker?<sup>5,6<\/sup><\/strong><\/h3>\n\n\n\n<p dir=\"ltr\" lang=\"nl-BE\" class=\"has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-760178ee836b7d7c76a498e2498ebe1d   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--09407b12cff3dc1f1be627d1ff37a91e wp-block-paragraph\" style=\"color:#603c37\">Bij blaaskanker vormen zich kwaadaardige cellen in de blaas. Er zijn verschillende soorten blaastumoren, die genoemd worden naar de cellen waaruit ze ontstaan:<\/p>\n\n\n\n<ul class=\"mhh-mcn-v2-clist mhh-mcn-v2-clist--38b34079afda5149d609b151010ef9ee mhh-mcn-list mhh-mcn-v2-clist--unordered mhh-mcn-v2-clist--unordered-dot\" dir=\"ltr\" lang=\"nl-BE\" start=\"1\">\n    \n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    <mark style=\"color:#943853\" class=\"has-inline-color\"><strong>Urotheelcelcarcinoom<\/strong><\/mark> (zie figuur) is het meest voorkomende type, tot 95% van alle blaaskankers. Dit type blaaskanker ontwikkelt zich uit cellen die de binnenkant van de blaas bekleden en dus in contact staan met de urine, dit zijn slijmvliesweefselcellen of ook urotheelcellen genoemd. Dit type cellen bedekt niet alleen de binnenwand van de blaas, maar ook een groot deel van de urinewegen: de plasbuis, de urineleiders en het nierbekken. Dit type kanker kan dus ook nog elders in de urinewegen voorkomen.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    <mark style=\"color:#943853\" class=\"has-inline-color\"><strong>Plaveiselcelcarcinoom<\/strong><\/mark> (zie figuur) is een zeldzamer type van blaaskanker en start in plaveiselcellen van de blaas. Dit type blaaskanker wordt geassocieerd met chronische irritatie van de blaas, bijvoorbeeld door een infectie, bestraling of een verblijfscatheter in de blaas.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    <mark style=\"color:#943853\" class=\"has-inline-color\"><strong>Adenocarcinoom<\/strong><\/mark> (zie figuur) is een zeer zeldzaam type van blaaskanker en ontstaat uit de cellen die slijmafscheidende klieren in de blaas vormen, deze kliercellen worden ook wel adenocellen genoemd.    <\/li>\n\n<\/ul>\n\n\n\n<p dir=\"ltr\" lang=\"nl-BE\" class=\"has-border-color has-has-red-border-color-border-color has-text-color has-link-color wp-elements-45f77f7a73ccbfe85ec4a9595e72cf1f   mhh-mcn-v1-paragraph mhh-mcn-v1-paragraph--facea91db35bc4d66eb91211feb493af wp-block-paragraph\" style=\"color:#603c37\">Verderop zullen we enkel het type \u201curotheelcelcarcinoom\u201d bespreken.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<figure class=\"mhh-mcn-v1-image mhh-mcn-v1-image--5525e26308ad8851c517411b6d2d5c53\">\n                    <img decoding=\"async\"\n        class=\"mhh-mcn-image mhh-mcn-image--full wp-image-86687\"\n        src=\"https:\/\/www.msdconnect.be\/nl\/wp-content\/uploads\/sites\/34\/2026\/03\/bladder-cancer-nl-1.png?quality=80&#038;lossy=1\"\n        width=\"2510\"\n        height=\"2342\"\n        loading=\"lazy\"        alt=\"\"\n            \/>\n            <\/figure>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n    <\/div>\n<\/section>\n\n\n<div class=\"mhh-mcn-v1-accordion mhh-mcn-v1-accordion--65686ccee5cee6a1163c938367839da4 mhh-mcn-v1-accordion--default\" data-configuration=\"{&quot;variation&quot;:&quot;default&quot;,&quot;speed&quot;:0,&quot;hasFirstItemExpanded&quot;:false}\"    dir=\"ltr\"    lang=\"nl-BE\">\n    \n\n<section\n    id=\"accordion-6adadb47c4ad1\"\n    class=\"mhh-mcn-v1-accordion-molecule mhh-mcn-v1-accordion-molecule--d12eee4ad03c85e95805ae3db46bb7cf mhh-mcn-v1-accordion-molecule--closed\"\n            >\n    <h4\n        id=\"accordion-6adadb47c4ad1-header\"\n        class=\"mhh-mcn-v1-accordion-molecule-header\"\n    >\n        <button\n            class=\"mhh-mcn-v1-accordion-molecule-header__heading\"\n            aria-expanded=\"false\"\n            aria-controls=\"accordion-6adadb47c4ad1-content\"\n        >\n                        <span class=\"mhh-mcn-v1-accordion-molecule-header__title\">\n                Referenties            <\/span>\n            <span class=\"mhh-mcn-v1-accordion-molecule-header__icon-dropdown\" aria-hidden=\"true\">\n                \n<svg width=\"1em\" height=\"1em\" class=\"mh-icon mh-icon--kind-generic mh-icon--name-dropdown-arrow mh-icon--dropdown-arrow\" role=\"img\" aria-hidden=\"true\">\n    \n    \n    <use xlink:href=\"https:\/\/www.msdconnect.be\/nl\/wp-content\/themes\/cex-wpvip-mhh-mconnect-theme-new-3.0\/modules\/icons\/resources\/icons\/svg\/generic\/dropdown-arrow.svg#dropdown-arrow\"><\/use>\n<\/svg>\n            <\/span>\n        <\/button>\n    <\/h4>\n    <div\n        id=\"accordion-6adadb47c4ad1-content\"\n        class=\"mhh-mcn-v1-accordion-molecule-content\"\n        role=\"region\"\n        aria-labelledby=\"accordion-6adadb47c4ad1-header\"\n    >\n        <div class=\"mhh-mcn-v1-accordion-molecule-content__body\">\n            \n\n<ol class=\"mhh-mcn-v2-clist mhh-mcn-v2-clist--7531967dd0d85bf43b0ae443e30cfc79 mhh-mcn-list mhh-mcn-v2-clist--ordered mhh-mcn-v2-clist--ordered-decimal\" dir=\"ltr\" lang=\"nl-BE\" start=\"1\">\n    \n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Medscape. Bladder Anatomy: Overview. Bladder Anatomy: Overview, Gross Anatomy, Microscopic Anatomy (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    National Institute of Diabetes, Digestive and Kidney Diseases (NIDDK). The Urinary Tract &amp; How It Works. The Urinary Tract &amp; How It Works &#8211; NIDDK (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Kanker.nl. Informatie over de blaas. Blaaskanker? Lees betrouwbare info &#8211; kanker.nl (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Union Internationale Contre le Cancer (UICC). Qu\u2019est-ce que le cancer? Qu&#8217;est-ce que le cancer ? | World Cancer Day (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    National Cancer Institute (NCI). What Is Bladder Cancer? What Is Bladder Cancer? &#8211; NCI (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Gluck G, Hortopan M, St\u0103nculeanu D, Chiri\u0163\u0103, M, Stoica R, Sinescu I. Comparative study of conventional urothelial carcinoma, squamous differentiation carcinoma and pure squamous carcinoma in patients with invasive bladder tumors. J Med Life. 2014 Jun 15;7(2):211-4.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    American Cancer Society. Cancer Staging. Cancer Staging | Has Cancer Spread | Cancer Prognosis | American Cancer Society (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    National Cancer Institute (NCI). Bladder Cancer Stages &#8211; NCI (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    American Cancer Society. Treating Bladder Cancer. 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Avelumab Maintenance Therapy for Advanced or Metastatic Urothelial Carcinoma NEJM. 2020;383:1218-1230.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Zhang Z, Fan W, Deng Q, Tang S, Wang P, Xu P, Wang J, Yu M. The prognostic and diagnostic value of circulating tumor cells in bladder cancer and upper tract urothelial carcinoma: a meta-analysis of 30 published studies. Oncotarget. 2017 Jun 16;8(35):59527-59538.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Kurahashi T, Hara I, Oka N, Kamidono S, Eto H, Miyake H. Detection of micrometastases in pelvic lymph nodes in patients undergoing radical cystectomy for locally invasive bladder cancer by real-time reverse transcriptase-PCR for cytokeratin 19 and uroplakin II. Clin Cancer Res. 2005 May 15;11(10):3773-7.    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Understanding Cancer Immunotherapy Research (UCIR). 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Patient guide on immunotherapy-related side effects and their management <a href=\"https:\/\/www.esmo.org\/for-patients\/patient-guides\/patient-guide-on-immunotherapy-related-side-effects-and-their-management\">https:\/\/www.esmo.org\/for-patients\/patient-guides\/patient-guide-on-immunotherapy-related-side-effects-and-their-management<\/a> (laatst geraadpleegd op 08\/2026)    <\/li>\n\n\n<li class=\"mhh-mcn-list-item mhh-mcn-v2-list-item\">\n    Kanker.nl. Bijwerkingen van immunotherapie. Bijwerkingen van immunotherapie | Kanker.nl (laatst geraadpleegd op 08\/2026)    <\/li>\n\n<\/ol>\n\n        <\/div>\n    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