Can kidney cancer patients be contagious?

Written by Zhou Qi

Nephrology

Updated on November 02, 2024

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Kidney cancer is not an infectious disease, so it is not contagious. Kidney cancer actually occurs when carcinogenic changes happen in the epithelial cells of the renal tubules, leading to the formation of masses and blood in the urine within the kidneys, and can even cause kidney failure. Moreover, kidney cancer carries a certain risk of metastasis, potentially causing damage to other organs. This disease is not contagious. The so-called infectiousness of a disease is due to the presence of pathogens that can cause infection. For example, hepatitis B can be transmitted because carriers have the hepatitis B virus in their bodies. Kidney cancer, however, does not involve viruses, bacteria, or fungi, so it is not infectious.

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Written by Wang Jian

Urology

1min 11sec

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Will there be metastasis after kidney cancer removal?

Currently, all malignancies tend to metastasize. Renal cancer is a common malignant tumor of the kidney in the urinary system. Generally, patients might not exhibit any symptoms in the early stages. The most common symptoms are usually back pain and hematuria, and some patients are diagnosed due to an abdominal mass. The primary treatment for renal cancer is surgical intervention, which is considered the preferred method and is believed to be potentially curative. For patients with stage I, II, III, and IV renal cancer, the survival rates decrease progressively. Patients with stage I and II renal cancer should have follow-ups every three to six months for three consecutive years after surgery, and then annually. Patients with stage III and IV renal cancer should have follow-ups every three months for two years post-treatment, then monthly in the third year, and annually thereafter. Early detection of metastasis is crucial for timely treatment. Therefore, even after nephrectomy, renal cancer might recur, and regular follow-ups are essential.

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Written by Zou De Bo

Urology

1min 13sec

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Difference between Renal Cancer and Renal Pelvis Cancer

First, the sites of the disease are different; renal pelvis cancer usually occurs in the epithelium of the renal pelvis or calyces, while renal cancer typically originates from the epithelial cells of the renal tubules. Second, the presentations are different; hematuria is a common symptom of both renal pelvis cancer and renal cancer. However, in renal pelvis cancer, hematuria can occur early, while in renal cancer, hematuria may not be seen until the tumor has invaded the renal pelvis or calyces. Third, the diagnostic tests are different; the clinical diagnosis of renal cancer heavily relies on CT scans, whereas renal pelvis cancer primarily depends on excretory or retrograde urography, that is, CT urography. Fourth, the CT appearances are different; on CT scans, renal cancer typically shows as a multicystic lesion with more pronounced enhancement during contrast than that seen in renal pelvis cancer. Fifth, the results of cytological examinations are different; cytology of renal pelvis cancer may show positive tumor cells, but renal cancer might test negative.

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Written by Wang Jian

Urology

1min 15sec

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Will a stage 1 kidney cancer recurrence occur after nephrectomy?

Stage I kidney cancer generally belongs to early-stage kidney cancer, which usually presents no symptoms and is most often discovered during physical examinations. This is the case for more than 50%-60% of kidney cancers. The examination for kidney cancer also requires a CT scan of the kidney and an enhanced CT scan to confirm the diagnosis. If it is stage I, the cure rate through surgical removal is very high. Surgical operation is the first choice for treating kidney cancer and is recognized as a means to cure kidney cancer. Early-stage kidney cancer can be treated with laparoscopic or traditional open surgery, which involves a radical removal of the kidney. For patients with stage I kidney cancer, the five-year survival rate can reach about 92%. Post-surgery, regular follow-up visits are necessary to check for recurrence, metastasis, and new tumors. After surgery, stage I kidney cancer patients should have follow-up visits every three to six months for the first three years and annually thereafter. Stage I kidney cancer has a chance of being completely cured but also the possibility of recurrence, so regular follow-ups are essential.

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Written by Zou De Bo

Urology

58sec

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Dietary precautions for renal cancer

Kidney cancer patients should be cautious with their diet and there are three types of food they should absolutely avoid: First, foods high in salt. Kidney cancer patients often suffer from severe kidney dysfunction, leading to edema. Consuming salty foods can increase the body's sodium content, causing sodium retention which is not metabolized in time, exacerbating the swelling. Second, high-fat foods. Excessive fat can also lead to weight gain, and high body fat can burden the kidneys. Third, foods high in potassium. With kidney cancer, patients often have inadequate kidney function and produce less urine, leading to high levels of potassium in the body. Consuming foods high in potassium can further increase blood potassium levels. Therefore, it's advisable for kidney cancer patients to avoid fruits and vegetables high in potassium.

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Written by Xu Chun Hua

Urology

41sec

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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.