Is kidney cancer the same as uremia?

Written by Ji Kang
Nephrology
Updated on May 02, 2025
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Kidney cancer cannot be equated with uremia. Kidney cancer is a malignant tumor of the kidney. Its treatment can be through surgery, radiotherapy, chemotherapy, and so on. Uremia, on the other hand, is the end-stage development of various kidney diseases. It is a clinical syndrome characterized by the loss of most or all kidney function, leading to sodium and water retention, various electrolyte disorders, and the accumulation of toxins such as urea nitrogen and creatinine. The treatment of uremia relies on hemodialysis, peritoneal dialysis, or kidney transplantation. Although kidney cancer is not uremia, severe kidney cancer can also develop into uremia. At that time, blood replacement therapy is also needed.

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Kidney cancer thrombus

Tumor thrombus is one of the common complications of tumors, and refers to cancer cells in blood vessels or lymphatic vessels similar to blood clots, i.e., cancer cells clustering together, invading the vessels, and causing abnormalities in blood coagulation function, leading to disorders in blood circulation and abnormal coagulation with clustered cancer cells. Generally, the risk of tumor thrombus formation is very high, and patients with tumor thrombus have much worse treatment outcomes than those without. Renal cancer is also a tumor commonly associated with tumor thrombus. Once a tumor thrombus occurs, it indicates that the surgery might be staged quite late, and thus, its treatment results are also relatively poor.

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What are the characteristic manifestations of kidney cancer?

Kidney cancer is a type of malignant tumor. Patients with this disease may exhibit some clinical symptoms. Some patients experience dull pain in the lumbar and back area due to the large growth of the tumor, which compresses the renal capsule. As the tumor grows, it may rupture and bleed, causing the patient to have visible blood in the urine. This type of hematuria is often painless and consistent throughout; patients may also feel a mass in the abdomen. In the early stages of kidney cancer, many patients do not exhibit clinical manifestations or discomfort. Therefore, patients often only exhibit the aforementioned clinical symptoms in a more severe state, later in the progression of the disease.

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What tests are done to diagnose kidney cancer?

The typical clinical manifestations of renal cancer are hematuria, a mass, and flank pain, but these symptoms generally appear only in the middle and late stages. CT scans often play a decisive role in the diagnosis of renal cancer. Ultrasound examinations are mainly used to screen for the presence of tumors in the entire urinary system, while excretory urography can reveal compression inside the renal pelvis by the tumor, which may show irregular deformations, narrowing, or elongation. Generally speaking, CT scans are quite important for the diagnosis of renal cancer and also play a decisive role.

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Can kidney cancer patients eat eggs?

Patients with kidney cancer can eat eggs. Kidney cancer is a malignant tumor of the kidney, originating from the epithelial cells of the renal tubules. Although this disease is a malignant tumor, the patient's body still needs nutrients. Therefore, high-protein foods can be consumed by patients, and they should maintain a protein intake roughly the same as that of healthy individuals. Eggs are rich in protein, with each egg containing about seven to eight grams of protein. Kidney cancer patients can eat eggs without worsening their condition or causing the disease to spread. The folk saying that some foods are "stimulating" is not scientifically founded. Currently, there is no clear evidence in medicine to support the claim that eggs and beef are "stimulating."

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Clinical Manifestations of Renal Cancer

In the early stages of kidney cancer, most patients do not experience any discomfort symptoms, making it difficult to detect. As the tumor progresses to the middle and late stages and increases in size, it can cause symptoms of back pain. If the tumor breaches the renal pelvis, leading to ruptured blood vessels, this condition will be accompanied by obvious gross hematuria, which often appears intermittently and is painless. If the tumor is large, a mass can be felt in the back. If these symptoms arise, it is crucial to promptly visit the hospital's urology department for tests such as ultrasound and CT scans to establish a clear diagnosis. If necessary, active surgical intervention should be considered.