Testicular Cancer: Warning Signs, Diagnosis, and Treatment

Testicular cancer is an uncommon but highly treatable cancer that most often affects younger and middle-aged men. Knowing the warning signs, seeking prompt medical assessment, and understanding treatment options can support earlier diagnosis and better care decisions.

Overview

Testicular cancer begins when cells in one or both testicles grow in an uncontrolled way. The testicles are part of the male reproductive system and produce sperm and testosterone. Although any cancer diagnosis can feel overwhelming, testicular cancer is one of the more treatable cancers, especially when identified early and managed by an experienced medical team.

Most testicular cancers develop from germ cells, the cells that normally make sperm. These cancers are broadly grouped into seminomas and non-seminomas, because they may behave differently and respond to treatment in different ways. Some tumors contain features of more than one type, so pathology results after surgery are important for planning care.

Testicular cancer can occur at different ages, but it is more common in adolescents, young adults, and middle-aged men than in older men. It usually affects only one testicle. A change in the testicle is not always cancer; infections, cysts, fluid collections, injury, and other benign conditions can cause similar symptoms. However, any new lump, swelling, or persistent discomfort should be assessed promptly.

Warning Signs and Symptoms

The most common warning sign is a lump, swelling, or change in the size or shape of a testicle. The lump may be painless, which is why it can be easy to ignore. Some men notice that one testicle feels firmer, heavier, or different from usual. Others may feel a dull ache in the lower abdomen, groin, or scrotum.

Symptoms can vary from person to person. Testicular cancer does not always cause pain, and early changes may be subtle. Men are encouraged to become familiar with the usual feel of their testicles so that new changes are easier to recognize.

• A painless lump or thickening in a testicle
• Swelling or enlargement of one testicle
• A feeling of heaviness in the scrotum
• Dull ache in the groin, lower abdomen, or testicle
• Sudden collection of fluid in the scrotum
• Breast tenderness or enlargement in rare cases due to hormone changes

Less commonly, symptoms may be related to cancer spread, such as persistent back pain, cough, chest discomfort, or unexplained weight loss. These symptoms can have many causes, but if they occur together with a testicular change, medical evaluation should not be delayed.

Causes and Risk Factors

The exact cause of testicular cancer is not fully understood. Like other cancers, it develops when genetic changes allow cells to grow and divide abnormally. Having a risk factor does not mean a person will develop testicular cancer, and many men diagnosed with it have no clear risk factor.

One of the best-known risk factors is an undescended testicle, also called cryptorchidism, where a testicle did not move into the scrotum normally before birth or early childhood. The risk may remain higher even if surgery was performed to move the testicle into place. A personal history of testicular cancer in one testicle also increases the chance of cancer developing in the other testicle.

Other factors may include a family history of testicular cancer, certain developmental conditions affecting the testicles, and infertility or reduced sperm production in some men. Testicular cancer is not caused by masturbation, sexual activity, vasectomy, or minor injuries to the testicle. An injury may simply draw attention to a lump that was already present.

How Testicular Cancer Is Diagnosed

Diagnosis usually begins with a medical history and physical examination. The doctor will ask when the change was first noticed, whether there is pain, and whether there are risk factors such as an undescended testicle or previous testicular cancer. The examination may include checking the testicles, groin, abdomen, and lymph node areas.

A scrotal ultrasound is commonly the first imaging test. It uses sound waves to show whether a lump is inside the testicle or outside it, and whether it looks solid or fluid-filled. This test is painless and does not use radiation. If a solid mass within the testicle is suspected, further evaluation is needed.

Blood tests called tumor markers may help support the diagnosis and guide treatment. Common markers include alpha-fetoprotein, beta-human chorionic gonadotropin, and lactate dehydrogenase. Not all testicular cancers raise these markers, so normal results do not completely rule out cancer.

If cancer is suspected, the usual next step is surgery to remove the affected testicle through an incision in the groin, known as radical inguinal orchiectomy. A biopsy through the scrotum is generally avoided because it can interfere with standard cancer pathways of spread. After surgery, the tissue is examined by a pathologist, and imaging such as CT scans may be used to determine whether the cancer has spread.

Staging and Treatment Options

Treatment depends on the type of tumor, stage, tumor marker levels, imaging results, and the patient’s overall health and preferences. Staging describes whether the cancer is limited to the testicle or has spread to lymph nodes or other organs. This information helps doctors recommend the most appropriate plan.

Surgery to remove the affected testicle is usually the first treatment. Many men live normally with one remaining testicle, which can often produce enough testosterone and sperm. A testicular prosthesis may be discussed for cosmetic or personal reasons. After surgery, some patients need no immediate additional treatment but are followed closely with surveillance.

Surveillance means regular check-ups, blood tests, and imaging according to a structured schedule. It is an active medical plan, not “doing nothing.” For some stages and tumor types, chemotherapy, radiotherapy, or surgery to remove lymph nodes may be recommended to reduce the risk of recurrence or treat cancer that has spread.

Seminomas are often very sensitive to radiotherapy and chemotherapy, while non-seminomas may require different combinations of chemotherapy and surgery depending on the situation. The medical team typically includes urologists, medical oncologists, radiation oncologists, radiologists, pathologists, fertility specialists, and supportive care professionals.

Fertility, Hormones, and Life After Treatment

Fertility is an important topic to discuss before treatment begins. Some men with testicular cancer already have reduced sperm counts at diagnosis, and certain treatments can temporarily or permanently affect sperm production. Sperm banking before surgery, chemotherapy, or radiotherapy may be recommended for men who may wish to have children in the future.

Most men can maintain normal testosterone levels with one healthy testicle, but some may develop low testosterone after treatment or if the remaining testicle has reduced function. Symptoms of low testosterone can include fatigue, low mood, reduced sexual desire, erectile difficulties, and loss of muscle strength. Blood tests can help assess hormone levels if symptoms occur.

Recovery also includes emotional and sexual well-being. It is common to have concerns about body image, relationships, masculinity, fertility, and recurrence. Open discussion with the care team, mental health support, and patient support groups can help men and their partners adjust during and after treatment.

Prevention and Self-Care

There is no proven way to prevent most cases of testicular cancer. However, awareness is valuable. Men should know what is normal for their own bodies and seek medical advice if they notice a change. A simple self-check can be done after a warm shower or bath, when the scrotal skin is relaxed.

During a self-check, each testicle can be gently rolled between the thumb and fingers to feel for lumps, swelling, or changes in firmness. It is normal for one testicle to be slightly larger or hang lower than the other. The epididymis, a soft tube-like structure at the back of the testicle, can also be felt and should not be mistaken for an abnormal lump.

Self-exams are not a substitute for medical care, and recommendations may vary depending on age and risk factors. Men with a history of undescended testicle, previous testicular cancer, or strong family history should ask their doctor whether they need more regular examinations or follow-up.

When to See a Doctor

A doctor should evaluate any new lump, swelling, hard area, or persistent pain in the testicle or scrotum. It is also important to seek care if one testicle changes size, feels heavier, or becomes noticeably different from the other. These changes are often caused by non-cancerous conditions, but only an examination and appropriate tests can confirm the cause.

Urgent medical attention is needed for sudden, severe testicular pain, especially with nausea, vomiting, or a testicle that appears higher than usual. This can be a sign of testicular torsion, a different condition that requires rapid treatment to protect the testicle.

Men who have been treated for testicular cancer should attend all scheduled follow-up visits, even if they feel well. Follow-up helps detect recurrence early, monitor side effects, and address fertility, hormone, and emotional health concerns. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat testicular cancer for international patients, with care plans tailored to each individual’s diagnosis and needs.

Frequently asked questions

Is every testicular lump cancer?

No. Many testicular or scrotal lumps are caused by benign conditions such as cysts, fluid collections, inflammation, infection, or enlarged veins. However, a lump inside the testicle should always be checked by a doctor because early assessment is the safest approach.

Does testicular cancer usually cause pain?

Testicular cancer is often painless, especially in the early stages. Some men notice heaviness, swelling, or a dull ache rather than sharp pain. Pain can occur, but the absence of pain does not mean a lump is harmless.

Can a man still have children after testicular cancer treatment?

Many men can father children after treatment, especially if the other testicle is healthy. However, cancer itself and treatments such as chemotherapy, radiotherapy, or lymph node surgery can affect fertility. Men who may want children in the future should discuss sperm banking before treatment whenever possible.

What happens after one testicle is removed?

Most men adapt well after removal of one testicle. The remaining testicle can often produce enough testosterone and sperm for normal sexual function and general health. If there are concerns about appearance, a testicular prosthesis may be discussed with the surgeon.

How is testicular cancer followed after treatment?

Follow-up usually includes physical examinations, blood tumor marker tests, and imaging at intervals recommended by the oncology team. The schedule depends on the cancer type, stage, and treatment received. Keeping follow-up appointments is important because recurrence is often most treatable when found early.

Can testicular cancer come back?

Yes, recurrence can happen, although many men are successfully treated and remain cancer-free. The risk depends on the tumor type, stage, and treatment plan. This is why surveillance and follow-up are an essential part of care after treatment.

References

• World Health Organization
• American Cancer Society
• National Cancer Institute
• European Association of Urology
• European Society for Medical Oncology

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.