What Are the Bladder Cancer Subtypes?
What Are the Bladder Cancer Subtypes? from Patient Empowerment Network on Vimeo.
Bladder cancer expert Dr. Shilpa Gupta provides an explanation of the disease and reviews the various bladder cancer subtypes.
Dr. Shilpa Gupta is the Director of the Genitourinary Medical Oncology at Taussig Cancer Institute and Co-Leader of the Genitourinary Oncology Program at Cleveland Clinic. Dr. Gupta’s research interests are novel drug development and understanding biomarkers of response and resistance to therapies in bladder cancer. Learn more about Dr. Gupta, here.
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Okay. Let’s start with a basic definition Dr. Gupta. What is bladder cancer?
Bladder cancer, basically as the name implies, is a cancer which affects the urinary bladder but, it’s not just limited to the bladder. It can be in the urothelial lining which extends up to the pelvis of the kidney. That’s not kidney cancer but still it’s thought of – urothelial cancer. So, I would define it as – because the treatment systemically is quite similar. So, when the urothelial cancer can be originating from bladder, per se, or from the upper tract disease, like the renal pelvis and the ureter. So, that’s the basic definition of this cancer.
Are there bladder cancer subtypes? And if so, what are they?
Yes, there are different kinds of bladder cancer and the most common one is urothelial carcinoma transitional cell carcinoma or TCC. This is the most common and there can be other types known as variant histology.
Sometimes they can be pure squamous cell carcinoma, which is only 1 to 2 percent of all bladder cancer. It’s very rare, but it does look like flat cells that are found on the surface of the skin. That’s why it’s easily identifiable and the treatment is slightly different.
Adenocarcinoma is another subtype where it’s only one percent of bladder cancers as well. Small cell cancers and sarcomatoid type are other very rare variants. But, I would say that for the most part when we call something urothelial carcinoma, we are defaulting to the common type called transitional cell carcinoma.