Dietary precautions for renal cancer

Written by Zou De Bo
Urology
Updated on September 28, 2024
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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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kidney cancer immunotherapy drugs

The immunotherapy for kidney cancer often involves the use of interferons or interleukins, and the results are generally satisfactory. The effects of radiotherapy and chemotherapy for kidney cancer are not very certain. Typically, after kidney cancer is diagnosed, radical nephrectomy is performed. During the surgery, adequate exposure is essential. The renal hilum should be ligated first to prevent cancer cells from being squeezed into the bloodstream during surgery. It is also necessary to remove the fascia and fat around the kidney, along with the lymph nodes at the renal hilum. Combining these surgical measures with immunotherapy usually yields very ideal results.

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What are the early symptoms of kidney cancer?

Many cases of kidney cancer often have no obvious symptoms in their early stages and are not discovered until the tumor progresses. After the tumor progresses, symptoms may include hematuria, which can be intermittent, painless, and visible throughout its course. There may also be back pain and a lump in the abdomen, which is evident in about twenty percent of cases. Slim individuals might find it easier to detect such lumps. There are also some extrarenal manifestations including fever, weight loss, accelerated erythrocyte sedimentation rate, anemia, hypertension, polycythemia, hypercalcemia, liver function impairment, etc. These symptoms might appear in the early stages. However, symptoms can vary from person to person.

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The difference between benign and malignant kidney cancer.

The incidence of kidney cancer is also considered relatively high, with over 95% of kidney tumors being malignant, and benign tumors being less common. The distinction between benign and malignant tumors is determined by their symptomatic expression and growth patterns, and they have different impacts on the body. Generally, benign tumors grow expansively or exophytically, have a slower growth rate, and have clearer boundaries with often a capsule surrounding them. The texture and color of the tumor are close to that of normal tissues. Malignant tumors, on the other hand, exhibit the opposite characteristics.

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Post-nephrectomy care for renal cancer

Postoperative care measures for kidney cancer primarily include observing the patient's vital signs. After a radical nephrectomy for a large renal tumor, a significant amount of tissue is removed including the kidney, surrounding adrenal fat, and lymph nodes at the renal hilum, which results in larger surgical wounds and potentially more bleeding. Therefore, it is crucial to closely monitor for signs of bleeding and ensure that transfusions and fluid administrations are unobstructed. Secondly, careful observation and management of the wound drainage tubes are required. Thirdly, for radical nephrectomies, once the patient is past the anesthesia phase and the blood pressure is stable, a semi-reclined position can be adopted. Patients who have undergone partial nephrectomy should remain in bed for one to two weeks to prevent further bleeding, and kidney functions should be monitored. Additionally, attention should be paid to symptoms such as breath holding and difficulty in breathing. Postoperative feeding should commence once gastrointestinal function is restored; thereafter, nutrition should be enhanced to boost bodily resistance. Calming medications may be appropriately used to ease pain, facilitating movement, effective coughing, and expectoration.

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Is late-stage kidney cancer contagious?

Advanced kidney cancer is not contagious from person to person. Kidney cancer is when the tissues of the kidney undergo abnormal proliferation and the condition has advanced to a late stage. Generally, it is recommended that patients with kidney cancer follow a high-protein, low-salt, low-sugar diet, avoid foods that increase the metabolic burden on the kidneys, and focus on fine, refined, and soft foods to improve the efficiency of nutrient absorption. Patients can eat more fruits and vegetables to increase their intake of vitamins and fibers. It is also generally advised for patients to eat more garlic, avoid eating leftovers, overnight foods, pickled items, abstain from alcohol, especially strong spirits, and avoid smoking.