Understanding Kidney Cancer: Causes, Symptoms, and Risks

Kidney cancer is a serious condition that often goes unnoticed in its early stages due to a lack of clear symptoms. This article delves into the causes of kidney cancer, including genetic mutations and lifestyle factors such as smoking and obesity. It also highlights the risk factors that may increase susceptibility to this disease. As the cancer progresses, symptoms like blood in urine, persistent back pain, and unexpected weight loss may emerge. Understanding these signs is crucial for early detection and treatment. Read on to learn more about kidney cancer and how to recognize its symptoms.

By Narendra Chaudhary Mar 28, 2026, 15:01 IST

What is Kidney Cancer?

The kidneys play a crucial role in filtering blood in our body. However, sometimes abnormal cells can start to grow in the kidneys, leading to the formation of tumors. If this cell growth becomes uncontrolled, it can develop into cancer, known as kidney cancer.

How Does Kidney Cancer Develop?

Genetic mutations can occasionally occur in the body, disrupting the natural regulation of cell growth. These uncontrolled cells proliferate in the kidneys, forming tumors that can gradually turn cancerous and spread to other parts of the body, a process referred to as metastasis.

Who is at Higher Risk for Kidney Cancer?

Several factors can increase the risk of developing this disease, including:

Smoking: Individuals who smoke or use tobacco have double the risk of kidney cancer.

Obesity: Excess body fat can affect cell growth, increasing the likelihood of cancer.

High Blood Pressure: Prolonged high blood pressure can exert pressure on the kidneys.

Family History: A family history of serious kidney diseases can slightly elevate the risk of cancer.

Initial Symptoms May Not Be Apparent

One of the most alarming aspects of kidney cancer is that it often shows no clear symptoms in its early stages. Consequently, it is frequently diagnosed late, by which time it may have already spread to other organs. However, as the cancer progresses, certain symptoms may gradually become noticeable.

Symptoms of Kidney Cancer

Blood in Urine: The urine may appear pink or red, which is one of the initial and most significant symptoms that should not be overlooked.

Lower Back Pain: Persistent pain in the lower back can occur, often radiating to the thighs, resembling typical back pain but not alleviated by rest or medication.

Mass or Swelling Near the Kidney: A lump or swelling may sometimes be felt in the lower back or other areas of the body, indicating a potential symptom of kidney cancer.

Constant Fatigue: Feeling tired even after adequate sleep can be a sign. If you find it hard to concentrate on work and feel sleepy all the time, consult a doctor, as this could indicate kidney cancer.

Loss of Appetite: A noticeable decrease in appetite or eating very little without any dietary changes can occur during this cancer.

Unexpected Weight Loss: Sudden weight loss without any dietary changes is also a symptom of kidney cancer, often occurring gradually.

Low Hemoglobin Levels: Symptoms such as fatigue, difficulty breathing, and chills can arise due to a decrease in red blood cells, which is a symptom of kidney cancer and should not be ignored.