Dysplastic Nevus: Symptoms, Causes, Diagnosis and Treatment

Written by Medicover Team and Medically Reviewed by Dr Koppisetti Satya Naga Ravi Teja , Dermatologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Dysplastic Nevus, also known as an atypical mole, is an unusually shaped or colored mole that differs in appearance from common moles. Although most dysplastic nevi are benign, they may be associated with an increased risk of developing melanoma, especially in individuals with multiple atypical moles or a family history of skin cancer.

These moles often have irregular borders, varied pigmentation, and a larger size than ordinary moles. Early diagnosis, regular skin examinations, and appropriate monitoring or removal when necessary are important to detect melanoma at an early stage and protect skin health.

What are the Symptoms of Dysplastic Nevus?

Dysplastic nevi differ from common moles in several ways. Here are the key characteristics to watch for:

Asymmetry: One half of the mole does not match the other half in shape.
Border: The edges of a dysplastic nevus are often irregular, ragged, or blurred.
Colour: The colour is not uniform and may include different shades of tan, brown, black, red, or pink.
Diameter: Dysplastic nevi are usually larger than common moles, often measuring more than 5 millimetres across.
Evolving: A healthcare professional should evaluate any changes in size, shape, colour, or elevation or any new symptoms such as bleeding, itching, or crusting.

What are the Causes of Dysplastic Nevus?

The exact cause of dysplastic nevi is not entirely understood, but several factors contribute to their development:

Genetic Predisposition

Genetic factors play a significant role in the formation of dysplastic nevi. Individuals with a family history of dysplastic nevi or melanoma have a higher likelihood of developing these atypical moles.

Ultraviolet (UV) Exposure

Prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds can damage the DNA of skin cells, leading to the formation of dysplastic nevi. People with fair skin, light hair, and light eyes are particularly susceptible to UV damage.

Other Contributing Factors

Additional factors such as immune suppression and exposure to certain chemicals can also contribute to the development of dysplastic nevi.

When to See a Doctor for Dysplastic Nevus?

Individuals with atypical moles, numerous moles, or a family history of melanoma should have regular skin examinations by a Dermatologist.

You should see a doctor if you notice:

A new or changing mole
A mole with irregular borders or multiple colors
Persistent itching, pain, or bleeding from a mole

Seek prompt medical evaluation if you:

Notice rapid enlargement or significant changes in a mole
Develop ulcer or spontaneous bleeding from a skin lesion
Observe features consistent with the ABCDE warning signs of melanoma (Asymmetry, Border irregularity, Color variation, Diameter greater than 6 mm, or Evolution)

These changes may indicate melanoma or another skin cancer requiring immediate evaluation and treatment.

No doctors found for Dysplastic Nevus in any location.

How is a Dysplastic Nevus Diagnosed?

Diagnosis typically involves a thorough skin examination by a dermatologist. If a mole appears atypical, the dermatologist may perform a biopsy, where a small tissue sample is taken for microscopic examination. This helps in determining whether the mole is dysplastic or if there are any signs of melanoma.

In addition to visual examination, dermatologists may use dermoscopy, a specialized tool that provides a magnified view of the skin, to better evaluate the structure and patterns of the mole. Patients with multiple atypical moles or a family history of melanoma may require regular skin screenings and photographic monitoring to track any changes over time. Early detection and careful monitoring are essential to prevent potential progression to skin cancer.