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Tümör büyümesi: Bazen bu iyi bir şeydir - zdmaa Tümör büyümesi: Bazen bu iyi bir şeydir
Hastalandığınızda, vücudunuz enfeksiyonla savaşmak için beyaz kan hücrelerinin üretimini artırdığı için boynunuzdaki lenf düğümleri şişebilir. Şişlik genellikle geçicidir ve tehdit ortadan kalktığında ve enfeksiyon tedavi edildiğinde, lenf düğümleri normal fasulye şeklindeki boyutlarına döner. Benzer şekilde, kanseri tedavi etmek için bir immünoterapi ilacı kullanıldığında, geçici olarak bir tümörün büyümesine neden olabilecek kanser hücrelerini bulmak ve yok etmek için bağışıklık hücrelerinin üretimini uyarır. Bu, bunun hastalık ilerlemesinin bir işareti olmadığını, araştırmacıların sahte evrim dediği şeyin bir belirtisi olduğunu anlamayan klinisyenler ve hastalar için kafa karıştırıcı olabilir – hastalığın kendisinden ziyade tedaviden kaynaklanan tümör büyümesi.
“Yanlış ilerleme, immünoterapinin yaygın bir yan etkisidir ve daha iyi anlamak için hala araştırılmaktadır. Geçmişte, yaygın inanç, bir tümörün büyüdüğü ve tedavinin durdurulması gerektiğiydi. Kanser Merkezleri tıbbi onkoloji şefi Pamela Creely. America, dedi ki: Artık bunun aslında immünoterapinin işe yaradığının bir işareti olduğunu biliyoruz.” (CTCA) ®
Çoğu zaman, onkologlar kanserin tedaviye yanıtını belirlemek için kullanılan takip testleri sırasında yanlış ilerlemenin kanıtlarını keşfederler. Akciğer Kanseri Merkezi tıbbi direktörü ve Phoenix’teki hastanemizde bir onkolog olan Ashish Sangal, “İmmünoterapi ilaçları ilk başta tümörün şişmesine ve büyümesine neden olur, ancak bu sadece geçicidir” diyor. “Yani tedaviden sonraki ilk üç ila altı ayda daha büyük görünen herhangi bir şey, ilerlediği anlamına gelmez.”
Bu nedenle immünoterapi gören hastalarda çoklu takip testleri gerekebilir. Dr. Creeley, “İmmünoterapinin sonuç alması diğer tedavilere göre daha uzun sürebilir” diyor. Bu nedenle immünoterapinin etkisini değerlendirirken sabırlı olmak önemlidir. “Hastalar ve klinisyenler, neler olup bittiğinden gerçekten emin olmak için bazen bir veya iki değerlendirmeden fazlasının gerektiğinin farkına varmaya başlıyorlar” diyor.
2000’den beri onkologlar, bir kanserin belirli bir tedaviye yanıtını ölçmek ve tedavi kararlarına rehberlik etmek için Standart Tümör Yanıt Değerlendirme Kriterleri (RECIST) adı verilen bir sisteme büyük ölçüde güvendiler. Ancak, bağışıklık sistemi ile ilgili tepki (irRC) kriterleri adı verilen yeni bir değerlendirme kriteri, yanlış ilerleme olgusunu açıklıyor ve immünoterapi ilaçlarının birçok klinik denemesinde kullanılıyor. Dr. Creeley, “Bunun hala gelişmekte olduğunu bilmek önemlidir, ancak yanıt modellerini daha iyi anlamak için çalışıyoruz” diyor.
Bazı çalışmalar, daha fazla çalışmaya ihtiyaç duyulmasına rağmen, sahte ilerlemenin daha iyi bir sonuca işaret ettiğini bulmuştur. Araştırmacılar sözde ilerlemenin nedenleri ve bundan muzdarip hastalar için ne anlama gelebileceği hakkında daha fazla bilgi edinmek için çalışırken, klinisyenler ve hastalar arasındaki iletişim çok önemlidir. Dr. Creeley, “İmmünoterapi henüz çok yeni olduğundan, giderek daha fazla bilgi duyurulmaktadır” diyor. “Onkologlar hastalarını o sırada bilinenler konusunda eğitmeli ve yeni bilgiler ortaya çıktığında onlara mümkün olan en kısa sürede iletilmelidir.”
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