{"id":19086,"date":"2026-09-28T14:32:24","date_gmt":"2026-09-28T12:32:24","guid":{"rendered":"https:\/\/jurmed.ro\/medici\/?p=19086"},"modified":"2026-09-28T14:32:24","modified_gmt":"2026-09-28T12:32:24","slug":"rolul-rmn-in-evaluarea-raspunsului-metastazelor-hepatice-colorectale-dincolo-de-recist","status":"publish","type":"post","link":"https:\/\/jurmed.ro\/medici\/rolul-rmn-in-evaluarea-raspunsului-metastazelor-hepatice-colorectale-dincolo-de-recist\/","title":{"rendered":"Rolul RMN \u00een evaluarea r\u0103spunsului metastazelor hepatice colorectale dincolo de RECIST"},"content":{"rendered":"<p style=\"text-align: justify;\">Evaluarea imagistic\u0103 a r\u0103spunsului terapeutic leag\u0103 direct radiologia de decizia oncologic\u0103. Continuarea sau schimbarea tratamentului sistemic, indica\u021bia unei interven\u021bii locale \u0219i evaluarea resectabilit\u0103\u021bii se bazeaz\u0103 frecvent pe evolu\u021bia imagistic\u0103 a bolii. RECIST 1.1 ofer\u0103 un limbaj standardizat \u0219i reproductibil pentru cuantificarea r\u0103spunsului tumoral. \u00cen metastazele hepatice colorectale, \u00eens\u0103, modificarea unui diametru nu descrie \u00eentotdeauna complet efectul biologic al tratamentului.<\/p>\n<p style=\"text-align: justify;\">RECIST 1.1 define\u0219te r\u0103spunsul par\u021bial prin reducerea cu cel pu\u021bin 30% a sumei diametrelor leziunilor \u021bint\u0103 fa\u021b\u0103 de examinarea ini\u021bial\u0103. Progresia presupune o cre\u0219tere de cel pu\u021bin 20% fa\u021b\u0103 de cea mai mic\u0103 sum\u0103 \u00eenregistrat\u0103, asociat\u0103 cu o cre\u0219tere absolut\u0103 de minimum 5 mm, progresia neechivoc\u0103 a bolii non-\u021bint\u0103 sau apari\u021bia unor leziuni noi neechivoce. Criteriile au fost elaborate \u00een primul r\u00e2nd pentru studiile clinice \u0219i sunt folosite \u0219i \u00een practica curent\u0103, dar dimensiunea nu este echivalent\u0103 cu viabilitatea tumoral\u0103. [1,2]<\/p>\n<p style=\"text-align: justify;\">mRECIST, dezvoltat pentru carcinomul hepatocelular, m\u0103soar\u0103 por\u021biunea tumoral\u0103 viabil\u0103 care capteaz\u0103 contrast \u00een faza arterial\u0103. Aceste criterii nu sunt validate pentru metastazele hepatice \u0219i nu trebuie transferate \u00een aceast\u0103 indica\u021bie. Ele ilustreaz\u0103 totu\u0219i motivul pentru care anumite tumori sau tratamente necesit\u0103 parametri suplimentari fa\u021b\u0103 de dimensiune. [3,4]<\/p>\n<p style=\"text-align: justify;\">Dup\u0103 tratamentul sistemic, metastazele colorectale pot deveni mai omogene \u0219i mai bine delimitate \u0219i pot prezenta fibroz\u0103, mucin\u0103 acelular\u0103 sau modific\u0103ri de perfuzie \u00eenaintea unei reduceri dimensionale importante. Necroza central\u0103, luat\u0103 izolat, nu dovede\u0219te un r\u0103spuns patologic major. Pentru metastazele tratate cu scheme care includ bevacizumab, criteriile morfologice CT au avut o asociere mai bun\u0103 cu r\u0103spunsul patologic \u0219i supravie\u021buirea dec\u00e2t RECIST \u00eentr-un studiu de referin\u021b\u0103, dar nu constituie un substitut universal pentru RECIST \u0219i nu au fost validate pentru toate tumorile sau regimurile terapeutice. [5,6]<\/p>\n<p style=\"text-align: justify;\">CT-ul torace-abdomen-pelvis r\u0103m\u00e2ne investiga\u021bia de baz\u0103 pentru stadializarea \u0219i monitorizarea global\u0103 a cancerului colorectal metastatic. Este rapid, disponibil \u0219i adecvat pentru evaluarea simultan\u0103 a bolii hepatice \u0219i extrahepatice. RECIST poate fi aplicat at\u00e2t pe CT, c\u00e2t \u0219i pe RMN, cu condi\u021bia unei tehnici adecvate \u0219i reproductibile; \u00een evalu\u0103rile seriate trebuie p\u0103strate, pe c\u00e2t posibil, aceea\u0219i metod\u0103, acela\u0219i protocol \u0219i aceea\u0219i secven\u021b\u0103 de m\u0103surare. [1,2,7]<\/p>\n<p style=\"text-align: justify;\">C\u00e2nd decizia clinic\u0103 depinde de cartografierea exact\u0103 a bolii intrahepatice, RMN-ul hepatic cu secven\u021be de difuzie \u0219i contrast hepatobiliar are cea mai bun\u0103 sensibilitate pentru metastazele colorectale, mai ales pentru leziunile subcentimetrice. O meta-analiz\u0103 a raportat sensibilit\u0103\u021bi per leziune de 93,1% pentru RMN cu gadoxetat, 82,1% pentru CT \u0219i 74,1% pentru PET\/CT, cu heterogenitate \u00eentre studii. [8] La pacien\u021bii evalua\u021bi dup\u0103 chimioterapie preoperatorie, un studiu prospectiv a g\u0103sit pentru leziunile de cel mult 1 cm o sensibilitate de 86% pentru RMN cu gadoxetat \u0219i 45,5% pentru CT; informa\u021bia RMN ar fi modificat planul operator la 45% dintre pacien\u021bi. [9]<\/p>\n<p style=\"text-align: justify;\">Diferen\u021ba dintre o singur\u0103 metastaz\u0103 \u0219i c\u00e2teva leziuni mici suplimentare poate schimba strategia local\u0103. Rela\u021bia cu vasele, c\u0103ile biliare \u0219i volumul hepatic restant poate modifica fezabilitatea rezec\u021biei, abla\u021biei sau radioterapiei stereotactice. Din acest motiv, consensul european pentru metastazele hepatice colorectale sincrone recomand\u0103 CT cu contrast al toracelui, abdomenului \u0219i pelvisului \u0219i RMN hepatic cu contrast hepatobiliar, ideal \u00eenaintea chimioterapiei, atunci c\u00e2nd resursele permit. [7]<\/p>\n<p style=\"text-align: justify;\">Caracterul multiparametric al RMN-ului completeaz\u0103 evaluarea dimensional\u0103. Secven\u021bele T1 \u0219i T2, achizi\u021bia dinamic\u0103 postcontrast, faza hepatobiliar\u0103, difuzia \u0219i h\u0103r\u021bile ADC pot descrie compozi\u021bia \u0219i distribu\u021bia \u021besutului tumoral. O cre\u0219tere a ADC poate \u00eenso\u021bi r\u0103spunsul, dar valorile depind de parametrii de achizi\u021bie, alegerea valorilor b, metoda de trasare a regiunii de interes \u0219i eterogenitatea leziunii. DWI \u0219i ADC nu fac parte din RECIST \u0219i nu trebuie folosite izolat pentru declararea r\u0103spunsului sau progresiei. [6,10]<\/p>\n<p style=\"text-align: justify;\">Schimbarea metodei de examinare poate crea o fals\u0103 impresie de progresie. Dac\u0103 evaluarea ini\u021bial\u0103 a fost f\u0103cut\u0103 prin CT, iar controlul prin RMN cu contrast hepatobiliar identific\u0103 focare mici nevizibile anterior, acestea nu trebuie declarate automat leziuni noi. Conform RECIST 1.1, o leziune nou\u0103 trebuie s\u0103 fie neechivoc\u0103 \u0219i s\u0103 nu poat\u0103 fi explicat\u0103 prin diferen\u021be de tehnic\u0103 sau prin schimbarea modalit\u0103\u021bii. Dac\u0103 constatarea este echivoc\u0103, reevaluarea ulterioar\u0103 poate clarifica momentul progresiei. [1,2]<\/p>\n<p style=\"text-align: justify;\">Disappearing liver metastases reprezint\u0103 o situa\u021bie distinct\u0103, descris\u0103 \u00een principal dup\u0103 chimioterapia metastazelor colorectale. RMN-ul cu contrast, \u00eempreun\u0103 cu ecografia intraoperatorie, ofer\u0103 cea mai bun\u0103 evaluare a acestor situsuri, dar dispari\u021bia imagistic\u0103 nu echivaleaz\u0103 cu r\u0103spunsul patologic complet. Meta-analizele arat\u0103 o probabilitate relevant\u0103 de boal\u0103 rezidual\u0103 sau recuren\u021b\u0103 local\u0103, iar conduita asupra situsurilor ini\u021biale r\u0103m\u00e2ne dependent\u0103 de context \u0219i de evaluarea multidisciplinar\u0103. [11,12]<\/p>\n<p style=\"text-align: justify;\">PET\/CT cu 18F-FDG aduce informa\u021bie metabolic\u0103 \u0219i poate detecta boal\u0103 extrahepatic\u0103 ce modific\u0103 strategia terapeutic\u0103. PERCIST 1.0 a propus un cadru standardizat pentru cuantificarea r\u0103spunsului metabolic, \u00eens\u0103 acesta nu \u00eenlocuie\u0219te RECIST \u0219i nu este utilizat de rutin\u0103 pentru evaluarea r\u0103spunsului metastazelor hepatice colorectale. [13] PET\/CT are o sensibilitate mai redus\u0103 pentru leziunile hepatice mici, iar chimioterapia recent\u0103 poate diminua detectabilitatea. Absen\u021ba capt\u0103rii FDG dup\u0103 tratament nu garanteaz\u0103 r\u0103spunsul histologic complet. [8,14,15]<\/p>\n<p style=\"text-align: justify;\">\u00cen practic\u0103, CT, RMN \u0219i PET\/CT r\u0103spund unor \u00eentreb\u0103ri diferite. CT sus\u021bine stadializarea \u0219i monitorizarea global\u0103 standardizat\u0103. RMN-ul hepatic este decisiv c\u00e2nd sunt necesare detec\u021bia leziunilor mici, caracterizarea unor focare echivoce, evaluarea \u00eenaintea tratamentului local sau reevaluarea dup\u0103 chimioterapie. PET\/CT se folose\u0219te selectiv, mai ales c\u00e2nd informa\u021bia metabolic\u0103 sau suspiciunea de boal\u0103 extrahepatic\u0103 poate schimba conduita. Evaluarea dup\u0103 abla\u021bie, embolizare sau radioterapie stereotactic\u0103 trebuie adaptat\u0103 tratamentului \u0219i momentului examin\u0103rii; modific\u0103rile postterapeutice nu pot fi reduse la diametrul RECIST.<\/p>\n<p style=\"text-align: justify;\">RECIST r\u0103m\u00e2ne un reper indispensabil, dar nu exhaustiv. Absen\u021ba reducerii dimensionale nu exclude un efect biologic, iar dispari\u021bia morfologic\u0103 sau metabolic\u0103 nu dovede\u0219te sterilizarea tumoral\u0103. Pentru metastazele hepatice colorectale, raportul radiologic trebuie s\u0103 separe evaluarea formal\u0103 RECIST de observa\u021biile morfologice \u0219i func\u021bionale suplimentare \u0219i s\u0103 precizeze limitele compara\u021biei. Aceast\u0103 integrare ofer\u0103 echipei multidisciplinare informa\u021bia necesar\u0103 pentru alegerea tratamentului sistemic \u0219i local.<\/p>\n<p><strong>Bibliografie<\/strong><\/p>\n<ol style=\"text-align: justify;\">\n<li>Eisenhauer EA, Therasse P, Bogaerts J, et al. New response evaluation criteria in solid tumours: revised RECIST guideline version 1.1. Eur J Cancer. 2009;45(2):228-247. doi:<a href=\"https:\/\/doi.org\/10.1016\/j.ejca.2008.10.026\">10.1016\/j.ejca.2008.10.026<\/a>.<\/li>\n<li>Schwartz LH, Liti\u00e8re S, de Vries E, et al. RECIST 1.1 update and clarification from the RECIST committee. Eur J Cancer. 2016;62:132-137. doi:<a href=\"https:\/\/doi.org\/10.1016\/j.ejca.2016.03.081\">10.1016\/j.ejca.2016.03.081<\/a>.<\/li>\n<li>Lencioni R, Llovet JM. Modified RECIST mRECIST assessment for hepatocellular carcinoma. Semin Liver Dis. 2010;30(1):52-60. doi:<a href=\"https:\/\/doi.org\/10.1055\/s-0030-1247132\">10.1055\/s-0030-1247132<\/a>.<\/li>\n<li>Zamboni GA, Cappello G, Caruso D, et al. ESR Essentials response assessment criteria in oncologic imaging practice recommendations by the European Society of Oncologic Imaging. Eur Radiol. 2025;35(2):674-683. doi:<a href=\"https:\/\/doi.org\/10.1007\/s00330-024-11006-w\">10.1007\/s00330-024-11006-w<\/a>.<\/li>\n<li>Chun YS, Vauthey JN, Boonsirikamchai P, et al. Association of computed tomography morphologic criteria with pathologic response and survival in patients treated with bevacizumab for colorectal liver metastases. JAMA. 2009;302(21):2338-2344. doi:<a href=\"https:\/\/doi.org\/10.1001\/jama.2009.1755\">10.1001\/jama.2009.1755<\/a>.<\/li>\n<li>Morawska I, Cieszanowski A. Assessment of the response to systemic treatment of colorectal liver metastases on cross-sectional imaging a systematic review. Pol J Radiol. 2023;88:e512-e520. doi:<a href=\"https:\/\/doi.org\/10.5114\/pjr.2023.132884\">10.5114\/pjr.2023.132884<\/a>.<\/li>\n<li>Siriwardena AK, et al. Multisocietal European consensus on the terminology diagnosis and management of patients with synchronous colorectal cancer and liver metastases. Br J Surg. 2023;110(9):1161-1170. doi:<a href=\"https:\/\/doi.org\/10.1093\/bjs\/znad124\">10.1093\/bjs\/znad124<\/a>.<\/li>\n<li>Choi SH, Kim SY, Park SH, et al. Diagnostic performance of CT gadoxetate disodium enhanced MRI and PET CT for colorectal liver metastasis. J Magn Reson Imaging. 2018;47(5):1237-1250. doi:<a href=\"https:\/\/doi.org\/10.1002\/jmri.25852\">10.1002\/jmri.25852<\/a>.<\/li>\n<li>Jhaveri KS, Fischer SE, Hosseini-Nik H, et al. Prospective comparison of gadoxetic acid enhanced liver MRI and contrast enhanced CT after chemotherapy. HPB Oxford. 2017;19(11):992-1000. doi:<a href=\"https:\/\/doi.org\/10.1016\/j.hpb.2017.06.014\">10.1016\/j.hpb.2017.06.014<\/a>.<\/li>\n<li>Padhani AR, Liu G, Koh DM, et al. Diffusion weighted magnetic resonance imaging as a cancer biomarker consensus and recommendations. Neoplasia. 2009;11(2):102-125. doi:<a href=\"https:\/\/doi.org\/10.1593\/neo.81328\">10.1593\/neo.81328<\/a>.<\/li>\n<li>Barimani D, Kauppila JH, Sturesson C, Sparrelid E. Imaging in disappearing colorectal liver metastases and their accuracy a systematic review. World J Surg Oncol. 2020;18:264. doi:<a href=\"https:\/\/doi.org\/10.1186\/s12957-020-02037-w\">10.1186\/s12957-020-02037-w<\/a>.<\/li>\n<li>Muaddi H, Karanicolas PJ. When is a ghost really gone a systematic review and meta-analysis of imaging to predict complete pathological response after chemotherapy. Ann Surg Oncol. 2021;28:680-690. doi:<a href=\"https:\/\/doi.org\/10.1245\/s10434-020-09184-0\">10.1245\/s10434-020-09184-0<\/a>.<\/li>\n<li>Wahl RL, Jacene H, Kasamon Y, Lodge MA. From RECIST to PERCIST evolving considerations for PET response criteria in solid tumors. J Nucl Med. 2009;50 Suppl 1:122S-150S. doi:<a href=\"https:\/\/doi.org\/10.2967\/jnumed.108.057307\">10.2967\/jnumed.108.057307<\/a>.<\/li>\n<li>Tan MCB, Linehan DC, Hawkins WG, Siegel BA, Strasberg SM. Chemotherapy induced normalization of FDG uptake by colorectal liver metastases does not usually indicate complete pathologic response. J Gastrointest Surg. 2007;11(9):1112-1119. doi:<a href=\"https:\/\/doi.org\/10.1007\/s11605-007-0218-8\">10.1007\/s11605-007-0218-8<\/a>.<\/li>\n<li>Akhurst T, Kates TJ, Mazumdar M, et al. Recent chemotherapy reduces the sensitivity of 18F FDG PET in the detection of colorectal metastases. J Clin Oncol. 2005;23(34):8713-8716. doi:<a href=\"https:\/\/doi.org\/10.1200\/JCO.2005.04.166\">10.1200\/JCO.2005.04.166<\/a>.<\/li>\n<\/ol>\n<p style=\"text-align: justify;\">Autor:<\/p>\n<p><strong>Dr. Radu Lucian Dumitru<\/strong>, Medic primar Radiologie \u0219i Imagistic\u0103 Medical\u0103,<\/p>\n<p>Clinica Medikali<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Evaluarea imagistic\u0103 a r\u0103spunsului terapeutic leag\u0103 direct radiologia de decizia oncologic\u0103. Continuarea sau schimbarea tratamentului sistemic, indica\u021bia unei interven\u021bii locale \u0219i evaluarea resectabilit\u0103\u021bii se bazeaz\u0103 frecvent pe evolu\u021bia imagistic\u0103 a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19087,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[],"class_list":["post-19086","post","type-post","status-publish","format-standard","has-post-thumbnail","category-oncologie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rolul RMN \u00een evaluarea r\u0103spunsului metastazelor hepatice colorectale dincolo de RECIST - Jurmed - Medici<\/title>\n<meta name=\"description\" content=\"metastaze hepatice colorectale pot deveni mai omogene \u0219i mai bine delimitate dupa tratamen\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jurmed.ro\/medici\/rolul-rmn-in-evaluarea-raspunsului-metastazelor-hepatice-colorectale-dincolo-de-recist\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rolul RMN \u00een evaluarea r\u0103spunsului metastazelor hepatice colorectale dincolo de RECIST - 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