Complications after interventional treatment for renal cancer

Written by Zeng Zhong
Urology
Updated on May 27, 2025
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Post-intervention complications of renal cancer can include hematuria, lower back pain, and tumor recurrence. Hematuria is indirect and painless, visible to the naked eye. Renal cancer often accompanies renal colic, which is due to the formation of ureteral blood clots. Blood clots from renal cell carcinoma can form a ribbon-like shape through the ureter, and the degree of hematuria is not related to the size of the renal cell carcinoma. Renal cell carcinoma sometimes presents persistent microscopic hematuria. Lower back pain is a common symptom, often an intermittent dull pain, usually due to the enlargement of the kidney tumor. When the tumor invades surrounding organs and the psoas major muscle, the pain is heavy and persistent.

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Written by Zhou Qi
Nephrology
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Can renal cancer be detected by ultrasound?

Ultrasound is a type of imaging examination that can observe the size, shape, structure, texture, and the presence of masses in the organs being examined. It can be used to determine if a patient potentially has kidney-related masses, such as differentiating between a kidney cyst and kidney cancer based on differences in shape and blood supply that malignant tumors typically exhibit compared to other conditions. However, using ultrasound to diagnose kidney cancer can be inaccurate, particularly in the early stages of the disease when ultrasound may not provide a clear view, and some complex cases of kidney cancer may still be indeterminate. Therefore, patients might consider undergoing an enhanced CT scan, which offers a higher diagnostic accuracy. Additionally, a kidney biopsy and pathological examination might be necessary for a definitive diagnosis.

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Written by Ji Kang
Nephrology
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Is kidney cancer the same as uremia?

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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Written by Xu Chun Hua
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How long can someone with kidney cancer and hematuria survive?

A common symptom of kidney cancer is painless visible blood in urine, which is also the primary initial symptom. It is intermittent and sometimes accompanied by blood clots. However, after exhibiting this symptom, how long a patient can live depends on individual constitution and the severity of the condition. Once discovered, early surgical treatment is recommended, followed by immunotherapy, such as using interferons and interleukins.

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Written by Wang Shuai
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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.

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Can color Doppler ultrasound detect renal cancer?

As an imaging examination method, color Doppler ultrasound can examine the kidneys and detect signs of kidney diseases, including kidney cancer, but it cannot serve as a definitive basis for diagnosing kidney cancer. Color Doppler ultrasound observes the size, shape, structure, and other medical information of the examined organ. From this information, some clues indicating kidney cancer can be found. However, to confirm kidney cancer, a pathological diagnosis is often required. Pathological diagnosis involves performing a kidney biopsy or surgically removing a part of the kidney tissue for pathological examination to definitively determine the presence of kidney cancer. Thus, color Doppler ultrasound can only serve as a clue in the investigation of kidney cancer.