OVERVIEW

What is Becker's nevus?

Becker's nevus, also known as Becker's melanosis, is a benign skin hamartoma that occurs in the epidermis or dermis.

This condition often appears as a tan-colored mark at birth, but many patients only show noticeable symptoms during puberty. It primarily affects appearance. If desired, laser treatment can be chosen, but recurrence is common.

Are there many people with Becker's nevus?

People with Becker's nevus are not uncommon.

SYMPTOMS

What are the common manifestations of Becker's nevus?

Becker's nevus typically appears as irregularly bordered brown patches, often found on the shoulders and upper trunk. Additionally, many patients experience hypertrichosis (excessive hair growth) in the affected area.

Is Becker's nevus present at birth?

Becker's nevus may be present at birth, but many patients only develop or notice it prominently during puberty.

Does Becker's nevus continue to grow larger?

Becker's nevus generally does not fade naturally and may gradually increase in size.

What adverse effects can Becker's nevus cause?

The primary adverse effect of Becker's nevus is its impact on the patient's appearance. Individuals with Becker's nevus often experience hypertrichosis or smooth muscle hamartomas. In rare cases, it may be associated with developmental abnormalities such as breast or pectoral muscle hypoplasia.

Can Becker's nevus become cancerous?

Becker's nevus typically does not undergo malignant transformation.

CAUSES

How is Becker's nevus formed?

The exact mechanism of Becker's nevus is still unclear. Its occurrence may be related to genetics and gene mutations, and studies suggest that androgen stimulation could be a contributing factor in its pathogenesis.

Who is more prone to Becker's nevus?

Since the pathogenesis remains unclear, the susceptible population is not well-defined. However, we have observed that individuals with a family history are more likely to develop it compared to those without.

Is Becker's nevus hereditary?

The heritability of Becker's nevus has not been conclusively determined, but there have been reports of familial cases, suggesting it may have a genetic component.

DIAGNOSIS

What additional tests are needed for Becker's nevus?

Patients with this condition require a clinical physical examination to check for developmental abnormalities such as bone anomalies.

Which diseases can Becker's nevus be easily confused with? How to differentiate them?

• Café-au-lait spots: Typically appear as light brown patches, either single or multiple, scattered with clear borders, commonly found on the face and trunk.

• Congenital melanocytic nevus: Presents as brown to black macules, scattered in distribution. A skin biopsy can confirm the diagnosis.

TREATMENT

Which department should I visit for Becker's nevus?

Dermatology.

Does Becker's nevus require treatment?

If the aesthetic impact of Becker's nevus is not a concern, treatment is unnecessary. However, if it significantly affects appearance or if high aesthetic standards are desired, treatment is recommended.

What are the treatment options for Becker's nevus?

Currently, laser therapy is the most common treatment for Becker's nevus.

Laser treatment yields good results but typically requires multiple sessions. There is also a possibility of recurrence, hyperpigmentation, or hypopigmentation.

DIET & LIFESTYLE

Are there any special precautions for people with Becker's nevus in daily life?

Avoid irritating the Becker's nevus, such as repeatedly picking or scratching it.

Are there any dietary precautions for people with Becker's nevus?

There are no specific dietary restrictions; maintaining a healthy and balanced diet is sufficient.

Does Becker's nevus affect normal life, study, or work?

It may affect the aesthetic appearance of the skin, but it has little impact on daily life, study, or work.

PREVENTION

Can Becker's nevus be prevented?

No.

The mechanism of Becker's nevus is not yet fully understood, so targeted prevention is not possible.