Finding a new lump or bump in the genital area can understandably cause concern. Whether you have noticed a small, firm nodule on the scrotal skin or a cluster of smooth lesions, the first step is an accurate diagnosis.
One of the most common causes of benign (non-cancerous) scrotal lumps is an epidermoid cyst (often referred to as a sebaceous cyst). While these are often identifiable on physical examination, a scrotal ultrasound may be used in some cases to provide additional reassurance or clarify the diagnosis.
What is a scrotal sebaceous cyst?
The skin of the scrotum contains multiple sebaceous glands that produce oils to protect the skin. Sometimes, a hair follicle or skin structure becomes blocked, leading to the formation of an epidermoid cyst.
These cysts are usually slow-growing, smooth, and mobile under the skin. They are typically painless but may become inflamed, tender, or infected.
Because a range of conditions can cause scrotal lumps—including cysts, skin lesions, hydroceles, or varicoceles—it is important that any new lump is assessed clinically.
The role of a scrotal sebaceous cyst ultrasound
In many cases, an experienced clinician can diagnose a superficial cyst based on examination alone. However, ultrasound may be recommended if there is any uncertainty about the lump’s nature.
A scrotal ultrasound uses sound waves to create detailed images of structures within the scrotum. It is a painless and non-invasive test that does not involve radiation.
It may be helpful for:
- Confirming that the lump is located within the skin rather than deeper structures
- Distinguishing cysts from conditions such as hydrocele, varicocele, or testicular masses
- Assessing the size, depth, and relationship to surrounding structures
- Providing reassurance when the diagnosis is unclear
Assessment and consultation
Evaluation usually begins with a clinical history and physical examination. This helps determine whether the lesion is consistent with a benign skin cyst or warrants further assessment.
If there is any uncertainty or if reassurance is required, ultrasound imaging may be considered as part of the assessment.
Treatment and Removal
If a cyst is confirmed and causing symptoms or concern, treatment options can be discussed.
Options may include:
- Observation if the cyst is small and asymptomatic
- Minor procedures to remove or drain the cyst
- Techniques such as electrosurgical removal (including hyfrecation) in selected cases
Procedures are usually performed under local anaesthesia. The choice of technique depends on the size, number, and location of cysts, as well as patient preference.
When to seek medical advice
Although most scrotal lumps are benign, they should always be assessed to confirm the diagnosis.
Seeking medical advice ensures that:
- Serious conditions are excluded
- Appropriate treatment options are discussed
- You receive reassurance about your condition
If you notice a new lump, a change in size, pain, or associated symptoms, a clinical assessment is recommended.
