{"id":26794,"date":"2025-06-24T15:23:37","date_gmt":"2025-06-24T12:23:37","guid":{"rendered":"https:\/\/www.clinica-sante.com\/ro\/analize-fara-categorie\/pd-l1-imunohistochimie\/"},"modified":"2026-06-16T11:28:15","modified_gmt":"2026-06-16T08:28:15","slug":"pd-l1-imunohistochimie","status":"publish","type":"product","link":"https:\/\/www.clinica-sante.com\/ro\/analize-anatomie-patologica\/pd-l1-imunohistochimie\/","title":{"rendered":"PD-L1 &#8211; imunohistochimie"},"content":{"rendered":"<p>Imunohistochimia PD-L1 este o metod\u0103 de analiz\u0103 tisular\u0103 care eviden\u021biaz\u0103 expresia proteinei PD-L1 la nivelul celulelor tumorale \u0219i al celulelor imune din microambientul tumoral, folosind anticorpi specifici valida\u021bi clinic.<\/p>\n<p>PD-L1 interac\u021bioneaz\u0103 cu receptorul PD-1 de pe limfocitele T, determin\u00e2nd inhibarea r\u0103spunsului imun antitumoral. Tumorile care exprim\u0103 PD-L1 pot \u201eevita\u201d r\u0103spunsul imun, ceea ce poate favoriza cre\u0219terea \u0219i progresia tumoral\u0103.<\/p>\n<h3>Determinarea expresiei PD-L1 este utilizat\u0103 pentru:<\/h3>\n<ul>\n<li>selec\u021bia pacien\u021bilor pentru imunoterapie (ex. anti-PD-1 \/ anti-PD-L1)<\/li>\n<li>stratificarea prognostic\u0103 \u00een mai multe tipuri de cancer<\/li>\n<li>integrarea \u00een algoritmi terapeutici personaliza\u021bi<\/li>\n<\/ul>\n<p>Interpretarea testului se realizeaz\u0103 prin scoruri standardizate (ex. TPS \u2013 Tumor Proportion Score, CPS \u2013 Combined Positive Score), \u00een func\u021bie de tipul tumoral \u0219i protocolul utilizat.<\/p>\n<h3>Afec\u021biuni sau simptome asociate<\/h3>\n<h3>Testul este utilizat \u00een evaluarea:<\/h3>\n<ul>\n<li>Cancerului pulmonar (NSCLC)<\/li>\n<li>Cancerului mamar (inclusiv triplu negativ)<\/li>\n<li>Cancerului urotelial (vezic\u0103 urinar\u0103)<\/li>\n<li>Cancerului gastric \u0219i esofagian<\/li>\n<li>Cancerului cervical<\/li>\n<li>Melanomului<\/li>\n<li>Carcinomului renal<\/li>\n<li>Alte tumori solide eligibile pentru imunoterapie<\/li>\n<\/ul>\n<h3>Cui se adreseaz\u0103<\/h3>\n<h3>Testarea se adreseaz\u0103:<\/h3>\n<ul>\n<li>Pacien\u021bilor diagnostica\u021bi cu tumori solide avansate sau metastatice<\/li>\n<li>Pacien\u021bilor eligibili pentru imunoterapie<\/li>\n<li>Medicilor oncologi pentru decizie terapeutic\u0103 personalizat\u0103<\/li>\n<li>Cazurilor \u00een care se evalueaz\u0103 r\u0103spunsul poten\u021bial la inhibitori PD-1\/PD-L1<\/li>\n<li>Tumor boards multidisciplinare pentru stabilirea tratamentului<\/li>\n<\/ul>\n<h3>Metodologie de testare<\/h3>\n<ol>\n<li>Se selecteaz\u0103 blocul tumoral reprezentativ (FFPE)<\/li>\n<li>Sec\u021bionarea \u021besutului \u0219i preg\u0103tirea lamei histologice<\/li>\n<li>Aplicarea anticorpilor anti-PD-L1 valida\u021bi clinic<\/li>\n<li>Incubare \u0219i reac\u021bie imunohistochimic\u0103<\/li>\n<li>Vizualizarea expresiei membranare PD-L1<\/li>\n<li>Evaluarea procentual\u0103 a celulelor pozitive (tumorale \u0219i\/sau imune)<\/li>\n<li>Calcularea scorului (TPS\/CPS, \u00een func\u021bie de tumor\u0103)<\/li>\n<li>Emiterea raportului imunohistochimic<\/li>\n<\/ol>\n<h3>Beneficii \u0219i importan\u021ba clinic\u0103<\/h3>\n<ul>\n<li>Permite selec\u021bia pacien\u021bilor pentru imunoterapie<\/li>\n<li>Poate contribui la alegerea unui tratament oncologic personalizat<\/li>\n<li>Poate ajuta la evitarea unor tratamente cu probabilitate redus\u0103 de r\u0103spuns<\/li>\n<li>Are valoare predictiv\u0103 pentru r\u0103spunsul la inhibitori PD-1\/PD-L1<\/li>\n<li>Contribuie la medicina de precizie \u00een oncologie<\/li>\n<li>Poate avea \u0219i valoare prognostic\u0103 \u00een anumite cancere<\/li>\n<\/ul>\n<h3>Particularit\u0103\u021bi \u0219i limit\u0103ri<\/h3>\n<h3>Particularit\u0103\u021bi<\/h3>\n<ul>\n<li>Este test companion diagnostic validat pentru mai multe terapii oncologice<\/li>\n<li>Interpretarea depinde de tipul tumoral \u0219i scorul utilizat (TPS\/CPS)<\/li>\n<li>Necesit\u0103 anticorpi \u0219i platforme standardizate<\/li>\n<li>Are un rol important \u00een deciziile terapeutice care implic\u0103 imunoterapia<\/li>\n<\/ul>\n<h3>Limit\u0103ri<\/h3>\n<ul>\n<li>Heterogenitate tumoral\u0103 \u00een expresia PD-L1<\/li>\n<li>Posibile diferen\u021be \u00eentre metode \u0219i anticorpi utiliza\u021bi<\/li>\n<li>Un rezultat PD-L1 negativ nu exclude complet un r\u0103spuns la imunoterapie<\/li>\n<li>Depinde de calitatea \u0219i reprezentativitatea probei<\/li>\n<\/ul>\n<h3>Indica\u021bii de testare<\/h3>\n<ul>\n<li>Tumori solide avansate sau metastatice<\/li>\n<li>Stabilirea eligibilit\u0103\u021bii pentru imunoterapie<\/li>\n<li>Cancer pulmonar non-microcelular<\/li>\n<li>Cancer mamar triplu negativ<\/li>\n<li>Cancer gastric \/ esofagian<\/li>\n<li>Cancer urotelial<\/li>\n<li>Melanom \u0219i alte tumori imunogene<\/li>\n<li>Evaluare \u00eenainte de ini\u021bierea tratamentului oncologic sistemic<\/li>\n<\/ul>\n<h3>Interpretarea rezultatelor<\/h3>\n<h3>Rezultatul este exprimat prin scoruri standardizate:<\/h3>\n<h3>PD-L1 pozitiv<\/h3>\n<ul>\n<li>Expresie semnificativ\u0103 a PD-L1 \u00een celulele tumorale \u0219i\/sau imune<\/li>\n<li>Sugereaz\u0103 probabilitate crescut\u0103 de r\u0103spuns la imunoterapie<\/li>\n<\/ul>\n<h3>PD-L1 negativ<\/h3>\n<ul>\n<li>Expresie absent\u0103 sau sub pragul de semnifica\u021bie<\/li>\n<li>Poate indica o probabilitate mai redus\u0103 de r\u0103spuns la imunoterapie, f\u0103r\u0103 a exclude complet beneficiul clinic.<\/li>\n<\/ul>\n<h3>Scoruri utilizate<\/h3>\n<ul>\n<li><strong>TPS (Tumor Proportion Score)<\/strong> \u2013 procentul celulelor tumorale pozitive<\/li>\n<li><strong>CPS (Combined Positive Score)<\/strong> \u2013 include celule tumorale + imune<\/li>\n<\/ul>\n<p>Interpretarea final\u0103 este realizat\u0103 de medicul anatomopatolog \u00een context clinic \u0219i terapeutic oncologic.<\/p>\n<h3>Raportarea conform ghidurilor<\/h3>\n<ul>\n<li>Ghiduri NCCN pentru imunoterapie<\/li>\n<li>Recomand\u0103ri ESMO pentru cancerul pulmonar \u0219i alte tumori solide<\/li>\n<li>Protocoale companion diagnostic aprobate (FDA\/EMA)<\/li>\n<li>Standardizarea scorurilor TPS\/CPS<\/li>\n<li>Ghiduri de patologie oncologic\u0103 molecular\u0103 \u0219i imunohistochimic\u0103<\/li>\n<\/ul>\n<h3>Factori care pot influen\u021ba rezultatul<\/h3>\n<ul>\n<li>Heterogenitatea expresiei tumorale<\/li>\n<li>Tipul de bloc parafinat utilizat<\/li>\n<li>Fixarea necorespunz\u0103toare a \u021besutului<\/li>\n<li>Necroza tumoral\u0103<\/li>\n<li>Diferen\u021be \u00eentre anticorpi \u0219i platforme de testare<\/li>\n<li>Prelevare nereprezentativ\u0103<\/li>\n<\/ul>\n<h3>Condi\u021bii pentru recoltare<\/h3>\n<ul>\n<li>Recoltare tisular\u0103 (biopsie sau pies\u0103 chirurgical\u0103)<\/li>\n<li>Fixare imediat\u0103 \u00een formalin\u0103 tamponat\u0103 10%<\/li>\n<li>Alegerea unui fragment tumoral reprezentativ<\/li>\n<li>Evitarea \u021besuturilor necrotice<\/li>\n<\/ul>\n<h3>Specimen de recoltare<\/h3>\n<ul>\n<li>\u021aesut tumoral inclus \u00een parafin\u0103 (FFPE)<\/li>\n<li>Biopsii sau piese chirurgicale oncologice<\/li>\n<\/ul>\n<h3>Prob\u0103<\/h3>\n<ul>\n<li>Blocuri de parafin\u0103 (FFPE) reprezentative<\/li>\n<li>Lame histologice pentru imunohistochimie PD-L1<\/li>\n<\/ul>\n<h3>Stabilitate<\/h3>\n<ul>\n<li>Blocurile FFPE sunt stabile pe termen lung<\/li>\n<li>Calitatea antigenic\u0103 depinde de fixare \u0219i procesare. Probele vechi pot influen\u021ba intensitatea expresiei detectate imunohistochimic.<\/li>\n<\/ul>\n<h3>Analize asociate recomandate<\/h3>\n<ul>\n<li>NGS panel tumoral (profilare genomic\u0103)<\/li>\n<li>MSI\/MMR (instabilitate microsatelitar\u0103)<\/li>\n<li>HER2 (IHC \/ ISH)<\/li>\n<li>ALK \/ ROS1 \/ EGFR (\u00een cancer pulmonar)<\/li>\n<li>Ki-67 (proliferare tumoral\u0103)<\/li>\n<li>Examinare histopatologic\u0103 complet\u0103<\/li>\n<li>Comisie oncologic\u0103 multidisciplinar\u0103<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Testul PD-L1 prin imunohistochimie este o analiz\u0103 companion diagnostic utilizat\u0103 pentru evaluarea expresiei proteinei PD-L1 (Programmed Death-Ligand 1) \u00een celulele tumorale \u0219i\/sau celulele imune din microambientul tumoral. Testul are rol esen\u021bial \u00een selec\u021bia pacien\u021bilor eligibili pentru imunoterapie (inhibitori de puncte de control imun).<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"product_brand":[],"product_cat":[1209,3168,2876],"product_tag":[],"class_list":["post-26794","product","type-product","status-publish","product_cat-analize","product_cat-anatomie-patologica","product_cat-serviciu-laborator","first","instock","sale","virtual","purchasable","product-type-simple"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Testul PD-L1 prin imunohistochimie este o analiz\u0103 companion diagnostic utilizat\u0103 pentru evaluarea expresiei proteinei PD-L1 (Programmed Death-Ligand 1) \u00een celulele tumorale \u0219i\/sau celulele imune din microambientul tumoral. 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