Overview

Post-Vasectomy Pain Syndrome (PVPS) is constant testicular pain that lasts longer than three months. The chronic pain always begins after a vasectomy, and it is never because of an infection.¹ The pain can vary from constant to intermittent, significantly affecting day-to-day activities and the quality of life of the patient.

PVPS is a diagnosis of exclusion. Only after a thorough patient history followed by a physical exam and a variety of tests can a healthcare professional confirm PVPS. This can confuse some because some symptoms can overlap, such as chronic pain, which can lead to a misdiagnosis.

This is why a differential diagnosis is important. Here, we will explore PVPS and identify the conditions that mimic the disease, as well as the differential diagnoses, to demonstrate the importance of a correct diagnosis.

What does post-vasectomy pain syndrome (PVPS) look like?

• The diagnostic criteria of PVPS may look like²
• Persistent pain that has lasted for three months after a vasectomy
• Scrotum pain must be in the scrotum or related areas
• Scrotum pain disrupts day-to-day activities and affects quality of life
• Scrotum pain cannot be explained by any other conditions

Common symptoms of PVPS are:²

• Continuous pain or dull ache in the testicles
• Tenderness in the scrotum
• Pressure or pain after ejaculation
• Pain in the vasectomy site
• Swelling of the epididymis
• Pain during intercourse

For PVPS to be diagnosed, these symptoms must be persistent for a long time. On average, a person is diagnosed with PVPS after chronic and consistent pain in the scrotum three months after a vasectomy, can sometimes be more or less than the indicated timeframe.²

The onset of PVPS can vary between seven months to two years after a vasectomy. Some clients have reported PVPS symptoms only a couple of weeks after a vasectomy, underscoring a need for more investigation on this syndrome.³

The more time passes with someone being affected by PVPS, the more their quality of life deteriorates. This is something to keep in mind during diagnosis, as PVPS is known to gradually affect one’s way of life due to the constant aches and pains in the scrotum.

Conditions that mimic PVPS

Other conditions can present as PVPS, and they can be urological or non-urological. This is why PVPS is diagnosed through a method of exclusion, to ensure all diseases that it could be are ruled out before starting any kind of treatment that could be fatal without the right kind of diagnosis.

This is why, before attributing any scrotal pain to PVPS, your healthcare professionals will need to look into your medical history, examine you physically and perform any needed diagnostic tests. With this combination, accuracy is guaranteed to identify the best diagnosis from various possible competing diagnoses.

This systematic process of diagnosis is identified as a Differential Diagnosis. A system that aids in identifying the most accurate diagnosis from a set of probable diagnoses.⁴

Differential diagnoses to consider

The following are key conditions that need to be ruled out prior to making a PVPS diagnosis.

Epididymitis

This is simply the swelling or inflammation of the epididymis (the coiled tube located at the back of the testes) caused by bacteria. This can happen suddenly (acute) or it can be long-term (chronic). When it is acute, it is accompanied by redness and pain on the epididymis, while when chronic, it presents as a dull pain that grows slowly and stays with you for an extended period.⁵

As initially said, this disease is an outcome of bacterial infections or sexually transmitted infections (STIs). Most commonly, epididymitis occurs because of the retrograde flow of urine, mostly seen in elderly males. Epididymitis can be identified through the following symptoms:⁵

• Pain starts at the back of one testis and spreads
• Swollen, tender, red, firm, and warm skin on the testis
• Scrotum swelling with fluid
• Urinary symptoms such as dysuria, urinary frequency, urgency or incontinence of urine, and urethral discharge

Key distinguishing features

Regarding causation, epididymitis is caused by an infection, and PVPS is caused by complications from a vasectomy. Epididymitis responds to antibiotics as it can be caused by a bacterial infection, and it is an infection associated with the urinary tract, while PVPS is located in the testis.

Sperm granuloma

Typically, a sperm granuloma is identified by a small lump in the scrotum that forms after a vasectomy. It is an inflammatory response to leaked sperm, and normally harmless but can sometimes cause pain or swelling in the area.⁶

Key distinguishing features

It can be misdiagnosed as PVPS because the lump often appears near the site of a vasectomy as a reaction or immune response to sperm leaking after the vas deferens are cut and sealed during a vasectomy.

Varicocele

Varicocele happens when the veins in the scrotum are enlarged.⁷ Varicocele does not typically present with any symptoms, but in rare cases, the affected person may experience:⁷

• Dull ache or throbbing in the scrotum
• Swelling or lump in the scrotum
• Shrinkage in the scrotum

Varicocele has been linked to infertility because it affects the quality and production of sperm. This syndrome is known to mainly affect young males.⁷

Key distinguishing features

Pain characteristics between varicocele and PVPS vary, as with the latter, pain is accompanied by ejaculation, erection or intercourse, whereas pain caused by varicocele occurs when there is prolonged physical activity. It is not a distinct pain but a rather heaviness or a dull ache. 

Hydrocele

A hydrocele is a swelling in the scrotum. It is caused by a buildup of fluid around the testicles, it is painless and known to resolve on its own.⁸ Newborn infants are commonly affected by this condition, and in some cases, it affects adults as well. With adults, its causation could range from injury to infection.⁸

Key distinguishing features

PVPS and hydrocele don’t share any features other than the origin of pain and some common symptoms. They differ not only in aetiology but also in duration of sickness and other factors such as:

• Key symptoms: hydrocele is a swelling of the scrotum, while PVPS is pain in the testis
• Treatment: Hydrocele often resolves on its own, while PVPS needs to be addressed with pain management and various other methods of treatment

Inguinal hernia

Simply, an inguinal hernia in the groin is a bulge in the groin area, typically located between your lower abdomen and the thigh.⁹ This is due to the muscles in your abdomen weakening. An inguinal hernia can feel like:

• Sudden pains in the groin or scrotum during prolonged physical activity
• Feeling weak
• Feeling pressure or aching in your groin or scrotum

In some cases, this type of hernia can be moved back into the body, but this procedure should only be performed by a healthcare provider.

 Key distinguishing features

With an inguinal hernia, there is a bulge in the groin area, while with PVPS, there is no bulge. Pain symptoms are consistent in both syndromes, but the similarities stop there.

Testicular torsion (in acute settings)

Acute testicular torsion happens when the spermatic cord twists, cutting off blood supply to the testicle.¹⁰ This is classified as a medical emergency that causes sudden pain in the scrotum, accompanied by swelling and potential loss of the testicle if immediate treatment is not administered.

Testicular torsion in an acute setting presents as:¹⁰

• Sudden pain
• Swelling and discolouration of the scrotum
• Nausea and vomiting

An important fact to note is that individuals with a bell clapper deformity are more susceptible to this condition.¹⁰

Key distinguishing features

When trying to distinguish between a testicular torsion and PVPS, healthcare providers use the cremasteric reflex and a Doppler ultrasound as a baseline. The cremasteric reflex is absent when a person is affected by testicular torsion; the opposite of PVPS is where the reflex is present. Blood flow to the testicles is affected by a testicular torsion; there is no blood flow, but with PVPS, blood flow to the testicle is normal.

Chronic orchialgia (Idiopathic)

This is simply chronic pain in the scrotum. This pain is localised to the testicle, epididymis, and spermatic cord, and it can last at least three months. It is termed idiopathic when the cause of the pain has either not been identified yet or is just unidentifiable.¹¹

This does not mean that chronic orchialgia has no cause; there are instances where causation is identified. It can range from infections and trauma to structural issues.¹¹

Key distinguishing features

Similarly to PVPS, chronic orchialgia is diagnosed through exclusion. These two syndromes share more features than they don’t, these are:

• Chronic pain
• No clear infection
• Ultrasound is normal
• Lab tests come back negative
• Impact on quality of life
• Pain varies

Differences can be noted in causation, where PVPS is linked to the vasectomy procedure, while chronic orchialgia has no identifiable cause. Chronic orchialgia can start anytime, while PVPS is related to a vasectomy surgery.

Diagnostic approach

PVPS diagnosis is dependent on the process of exclusion. Your healthcare provider needs to gather information on your medical history, including your vasectomy timeline if this procedure has been performed. A physical examination is necessary to determine the location of pain. A scrotal ultrasound is also required to ensure there is blood flow, and if there may be any imaging that might indicate another diagnosis.

Laboratory tests need to be performed to determine whether there is an infection causing the pain. After all this is done and more as your healthcare provider sees fit to diagnose you, they will direct you to the proper doctors or urologists for any second opinions if needed, and treatment will then begin.

Importance of accurate diagnosis

An accurate diagnosis is vital to reduce unnecessary treatments that may cause avoidable damage to you as a patient. With the correct diagnosis, you will be treated as soon as possible to reduce the problems this syndrome may be causing to your quality of life. The right diagnosis is also the best instrument to aid in tailoring the best pain management strategies for patients with PVPS.

Summary

PVPS is a syndrome diagnosed through a diagnosis of exclusion, meaning it has no clear cause. This is why it is important to understand all present differential diagnoses to ensure a correct diagnosis. With the right diagnosis, the patient can begin treatment as soon as possible. These differential diagnoses can be: epididymis, sperm granuloma, varicocele, hydrocele, inguinal hernia, testicular torsion (in acute setting), and chronic orchialgia. 

Knowledge of PVPS differential diagnosis is important, not only for the patient but also for the healthcare providers. Having a well-rounded understanding of what you may come across as a person experiencing unexplainable scrotum pain will aid in preparing you mentally for the diagnosis process.

As the patient, you are encouraged to consider all possible causes of post-vasectomy pain to ensure you are being properly diagnosed. Work hand in hand with your healthcare provider so you can get the best diagnosis and treatment to improve your health and quality of life as soon as possible.