Paratesticular Tumours
Specialist assessment of lumps arising beside the testicle, including masses of the epididymis, spermatic cord and surrounding tissues. Many paratesticular lesions are benign, but an accurate diagnosis is important because some uncommon tumours require different treatment.
What is a paratesticular tumour?
A paratesticular tumour is a growth arising from the structures around the testicle rather than from the testicle itself. These structures include the epididymis, spermatic cord, tunica and other tissues within the scrotum.
This distinction matters. A lump arising from the epididymis or spermatic cord has a different range of possible causes from a lump arising within the testicle.
Many paratesticular lumps are benign. These may include cysts, lipomas, adenomatoid tumours, leiomyomas and inflammatory lesions. Less commonly, malignant tumours such as soft-tissue sarcomas or other rare cancers can occur.
The aim of assessment is therefore not simply to determine whether a lump is present, but to establish where it arises, what it is likely to represent and whether treatment is needed.
Paratesticular is not the same as testicular
On examination, a lump beside the testicle can sometimes feel as though it is part of the testicle. Scrotal ultrasound is usually the first imaging investigation used to clarify where the abnormality originates.
If a mass is clearly separate from the testicular tissue, this can substantially change the possible diagnosis and treatment approach.
What can cause a paratesticular lump?
A paratesticular mass does not automatically mean cancer. There is a broad range of benign, inflammatory and malignant conditions that can produce a lump beside the testicle.
Benign tumours
Non-cancerous paratesticular tumours include adenomatoid tumours, lipomas and leiomyomas. Management depends on the imaging appearance, symptoms, growth and certainty of the diagnosis.
Cysts & inflammatory lesions
Epididymal cysts, spermatoceles, inflammatory change and fibrous lesions can also present as a scrotal lump and may resemble a tumour clinically.
Rare malignant tumours
Some solid paratesticular masses represent uncommon cancers, including soft-tissue sarcomas arising from the spermatic cord or surrounding tissues. Their management is different from conventional testicular germ-cell cancer.
What symptoms can paratesticular tumours cause?
Common presentations
- A new lump beside or above the testicle
- A slowly enlarging scrotal mass
- A lump within the epididymis
- A groin or upper-scrotal mass along the spermatic cord
- Scrotal heaviness or discomfort
- An incidental abnormality found during ultrasound
Some lesions cause no pain and may have been present for a prolonged period before they are investigated.
Changes that deserve assessment
- A new solid scrotal lump
- A mass that appears to be increasing in size
- A firm or irregular lesion
- A recurrent mass after previous surgery
- A diagnosis that remains uncertain after initial imaging
These findings do not necessarily indicate malignancy, but they generally warrant appropriate clinical assessment.
How is a paratesticular mass investigated?
Investigation is tailored to the individual lesion. Not every patient requires every test.
Clinical assessment
The first step is to determine whether the lump appears to arise within the testicle or from a surrounding structure such as the epididymis or spermatic cord. Previous surgery, growth, discomfort and other medical history are also considered.
Scrotal ultrasound
Ultrasound is commonly the first imaging test. It can help establish the location, size, solid or cystic nature and blood-flow characteristics of a lesion, while assessing the testicle itself.
Blood tests when appropriate
Testicular tumour markers may be requested when an intratesticular tumour remains part of the differential diagnosis. Normal markers do not by themselves determine whether a paratesticular lesion is benign or malignant.
Additional imaging
MRI may be useful when ultrasound does not clearly establish the origin or nature of a mass. CT or other staging imaging may be required when the findings raise concern for malignancy.
Pathology & multidisciplinary review
For an indeterminate or suspicious solid mass, the method of obtaining a tissue diagnosis should be planned according to the location and suspected tumour type. Rare malignant paratesticular tumours may benefit from review involving urology, radiology, pathology and a sarcoma or oncology multidisciplinary team.
Does the testicle always need to be removed?
No. Many paratesticular lesions arise outside the testicle, and local excision with preservation of the testicle may be appropriate when the lesion is believed to be benign and can be removed safely.
The situation is different when imaging, operative findings or pathology suggest a malignant tumour. Some cancers arising from the spermatic cord or surrounding tissues require a wider oncological operation to achieve an appropriate surgical margin, and this can include removal of the testicle and spermatic cord.
The appropriate operation therefore depends on the likely diagnosis, anatomical location and oncological requirements—not simply on the presence of a scrotal lump.
Treatment options
Treatment is based on the diagnosis rather than using the same approach for every paratesticular mass.
Observation
Some lesions with reassuring clinical and imaging features may not require immediate surgery. Follow-up can sometimes be considered depending on symptoms and diagnostic certainty.
Local or testis-preserving excision
A well-defined benign or appropriately selected paratesticular lesion may be removed while leaving the testicle intact. The exact surgical approach depends on its site and relationship to surrounding structures.
Oncological surgery
A suspected or confirmed malignant tumour may require wider excision. For some spermatic-cord malignancies this can include an inguinal operation with removal of the spermatic cord and testicle where necessary to obtain appropriate margins.
Unexpected sarcoma after previous surgery
Occasionally, a lump initially thought to be benign is removed and the final pathology unexpectedly identifies a sarcoma or another rare malignancy.
In this situation, the pathology, original operation and imaging generally need to be reviewed before deciding whether additional surgery, surveillance or other treatment should be considered.
Fertility and hormonal considerations
When surgery can preserve the testicle safely, maintaining normal testicular tissue may be desirable. However, cancer control remains the priority when a malignant tumour is suspected or confirmed.
If removal of one testicle is required, the remaining healthy testicle will often continue to produce testosterone and sperm. Individual circumstances vary, particularly in men with pre-existing fertility problems, a previous testicular condition or abnormalities affecting the opposite testicle.
Fertility assessment or fertility-preservation planning can be discussed before treatment when relevant.
Before surgery, discussion may include:
- Whether the testicle can reasonably be preserved
- The degree of uncertainty about the diagnosis
- The implications of the final pathology result
- Potential need for additional treatment
- Fertility goals
- Testosterone considerations
- Whether a testicular prosthesis is relevant if orchidectomy is required
Assessment of uncommon testicular and paratesticular masses
Dr Jack Crozier is a Brisbane urologist and fellowship-trained andrologist. His advanced urological training in Australia and at University College London Hospitals included the assessment and surgical management of testicular and paratesticular tumours.
Consultation focuses on establishing where a mass arises, reviewing existing imaging and determining whether surveillance, further investigation, testis-preserving surgery or an oncological treatment pathway should be considered.
You may wish to arrange assessment if:
- You have been found to have a solid epididymal mass
- Ultrasound has identified a spermatic-cord lesion
- A scrotal lump remains indeterminate
- A mass is increasing in size
- Surgery has been recommended and you want to understand the options
- Previous pathology has unexpectedly identified a rare paratesticular tumour
Paratesticular tumour FAQ
Is a paratesticular tumour always cancer?
What is the difference between a testicular and paratesticular tumour?
Can ultrasound tell whether a paratesticular mass is cancer?
Do tumour-marker blood tests diagnose a paratesticular tumour?
Does every paratesticular mass need a biopsy?
Can a paratesticular tumour be removed without removing the testicle?
What is a spermatic-cord sarcoma?
What happens if a mass was removed and the pathology unexpectedly shows cancer?
Explore related testicular and scrotal conditions
Have you been diagnosed with a paratesticular mass?
A specialist review can help clarify where the mass arises, what further investigation may be appropriate and whether observation, local excision or an oncological treatment pathway should be considered.
Book a ConsultationMedical information: This page provides general educational information and is not a substitute for individual medical advice. Investigation and treatment recommendations depend on clinical examination, imaging, pathology, medical history and individual circumstances. Seek urgent medical attention for sudden severe testicular or scrotal pain.