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Infection, Hydrocele or Tumour — Which Testicular Swelling Needs an Ultrasound This Week?

Last updated: 05-Oct-2026

Send your ultrasound and blood reports ahead of your appointment, so the consultation starts with them already read · +91-63590-11009

Dr Swati Shah, testicular cancer surgeon, Ahmedabad

Dr Swati Shah
MS, DrNB (Surgical Oncology)
Testicular Cancer Surgeon · Apollo Hospital, Bhat, Gandhinagar · Gota OPD, Ahmedabad

Shah’s Gastro, Cancer & Robotic Surgery Centre. 18 years of experience in cancer surgery. ★★★★★ 4.99 from 84 Google reviews (Gota clinic) · 5.0 from 33 (Apollo, Bhat)

IN SHORT

A lump or hardness in one testis that does not hurt, in a man aged fifteen to forty-five, needs an ultrasound of both testes.

A swelling called infection or hydrocele that has not settled after one course of antibiotics needs a scan next, not a second course.

Pain does not rule cancer out. Breast swelling, back pain, a lump above the collarbone or breathlessness in a young man can start here.

Why the lump that does not hurt is the one to take seriously

The commonest first sign of testicular cancer is a swelling or a hard area in one testis that does not hurt, in a man between about fifteen and forty-five. Because there is no pain, it is easy to put off. It is also the sign most often given another name.

The test that settles it is a scrotal ultrasound with a high-frequency probe, of both testes. Both, because a tumour can be present on the other side as well, and tiny specks of calcium in the other testis (microlithiasis) change what is planned. The scan takes a few minutes and does not hurt.

Testicular cancer responds well to treatment, even after it has spread. That is why the delay matters more than the fear. The avoidable harm in this disease is the time between noticing a lump and having it scanned.

The antibiotic trap: one course, then a scan

If a swelling was treated as an infection of the testis (epididymo-orchitis) or called a hydrocele, and it has not settled after one course of antibiotics, the next step is an ultrasound. Not a second course.

This is the single largest cause of delay in Indian practice. The first diagnosis is often reasonable. The problem is repeating it. Each extra course adds weeks in which a tumour that could have been dealt with early can reach the lymph nodes at the back of the abdomen.

So the rule is simple, and you can hold any doctor to it, including us: one course of antibiotics, then a scan if the swelling is still there.

Pain does not rule it out

A painful lump can still be a tumour. Bleeding inside a tumour causes pain, so sudden pain does not mean the cause is harmless.

Sudden, severe pain in one testis in a young man needs to be seen within the hour. A twisted testis (torsion) and a tumour can look alike, and the decision to explore the scrotum is made that same hour. It is not a scan-and-review-tomorrow problem.

When the first sign is somewhere else in the body

In some men the scrotum is not where the trouble first shows. When a young man has any of the following, the testes are examined and scanned, because the cause can start there:

  • Breast swelling or tenderness (gynaecomastia)
  • Back pain without an obvious reason
  • A lump just above the collarbone
  • Breathlessness

Signs that need you seen the same day

  1. Sudden severe pain in one testis.
  2. Breathlessness or coughing up blood in a young man, especially with a large lump in the abdomen. With a very high hCG blood level this is an emergency, and chemotherapy is started urgently, without waiting for the testis operation.
  3. Passing very little urine with a known lump in the abdomen, which can block the tubes from the kidneys.

Who should look more carefully

Some men carry a higher chance of a tumour, and a new lump in them should never wait. That includes a man who had an undescended testis as a child (cryptorchidism), a man who has already had a tumour in the other testis, a man with a small, shrunken testis (atrophy), and a man being treated for infertility.

What each sign may mean, and how soon to act

What you noticeWhat it may beHow soon
Lump or hardness in one testis, without painA tumour until a scan says otherwiseUltrasound of both testes this week
Swelling treated as infection, still there after one antibiotic courseA tumour given the wrong nameUltrasound now, before any second course
Swelling called a hydrocele that has not gone awayA hydrocele, or a tumour given that nameUltrasound before any hydrocele treatment
Sudden severe pain in one testisTorsion, or bleeding into a tumourWithin the hour
Breast swelling, back pain or a collarbone lump in a young manSpread from a testicular tumourExamination and scrotal ultrasound soon
Breathlessness or coughing bloodA possible emergency with a very high hCGHospital the same day

What happens at the first visit, and two things not to skip

The first visit is an examination, an ultrasound of both testes and three blood tests: AFP, beta-hCG and LDH. These are the tumour markers.

The markers must be taken before any operation. They are repeated after the testis is removed, and the value after surgery is what sets the stage and the treatment group. A set missed before the operation cannot be recovered later.

No biopsy or cut through the scrotum. If cancer is likely, the testis is removed through a small cut in the groin. An operation or biopsy through the scrotal skin opens a new route for spread and changes the whole plan afterwards. It cannot be undone.

Sperm banking is raised at this first visit, with its cost, because it has to be done before treatment starts and families need a few days to arrange it. A testicular prosthesis is mentioned too. What happens after the diagnosis is set out on the testicular cancer surgery and fertility page.

After treatment, the other testis is still checked

A new tumour can appear later in the remaining testis. So every man is taught to examine it himself once a month, and any new lump there is scanned, not watched.

Frequently asked questions

The lump does not hurt at all. Can I wait and see if it goes?

Please do not wait. A lump without pain is the commonest way testicular cancer first shows. An ultrasound of both testes answers the question in minutes.

My doctor said it is an infection and gave antibiotics. It is still swollen. What now?

Get a scrotal ultrasound before any second course. A swelling that has not settled after one course of antibiotics is scanned, not treated again.

Can a biopsy be done first, to be sure it is cancer?

Not through the scrotum. A needle or cut through the scrotal skin opens a new route for spread. If the scan and blood tests point to cancer, removing the testis through the groin is both the diagnosis and the first treatment.

Why must the blood tests be done before the operation?

AFP, beta-hCG and LDH before surgery are compared with the values after it, and the value after surgery sets the stage. A set missed before the operation cannot be recreated.

I am not married yet. Will this affect having children?

It can. Removing one testis usually keeps fertility, but not always, and chemotherapy or abdominal node surgery can reduce it further. Sperm banking is offered to every man at the first visit, married or not, before any treatment.

Where Dr Swati Shah sees and operates

Shah’s Gastro, Cancer & Robotic Surgery Centre
Dr Swati Shah — MS, DrNB (Surgical Oncology) · Testicular Cancer Surgeon

Consultation at Gota OPD, Ahmedabad. Surgery at Apollo Hospital, Bhat, Gandhinagar.

Gota OPD, Ahmedabad

Gota, Ahmedabad, Gujarat

Apollo Hospital, Bhat, Gandhinagar

Apollo Hospital International Limited
Plot No. 1 A, GIDC Bhat Industrial Estate
Bhat, Gandhinagar, Gujarat

Phone and WhatsApp: +91-63590-11009

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