Nevus of Ota vs Bilateral Nevus of Ota-Like Macules Explained

Hello, this is Yonsei Star Dermatology Sinchon, your skin concern consultation center. Today, we will learn about the differences between Ota nevus and acquired bilateral nevus of Ota-like macules, and effective treatment methods. Although the two conditions may appear similar, their causes and treatment methods differ, so accurate differentiation is important. In particular, we will look closely at the necessity of early treatment and effective treatment methods.

Ota nevus is a type of congenital pigmentary disorder where melanin cells in the skin are deeply embedded in the dermis, resulting in stubborn skin spots. It was first named 'Ota nevus' by Dr. Ota in Japan.

It typically appears as a bluish discoloration around the eyes, cheekbones, temples, and nose. Unlike common moles, which are brown or black, Ota nevus appears blue because the cells are located deep within the skin, much like deep river water appears blue. It often occurs immediately after birth, within a few months of birth, or within a few years, and does not disappear naturally over time.

Acquired bilateral nevus of Ota-like macules, as the name suggests, is an acquired pigmentary disorder. Its histological characteristics are similar to Ota nevus, so it is called 'Ota-like nevus,' but there are differences in clinical features.

• It primarily develops from the late teens to early twenties and is common in middle-aged individuals.
• While Ota nevus often appears on one side of the face, acquired bilateral nevus of Ota-like macules often appear symmetrically on both sides.
• It is more common in women than in men.

How is it different from melasma?

Acquired bilateral nevus of Ota-like macules can be confused with melasma, as they often look similar or occur together.

• Melasma: Generally appears as widespread, hazy brown or black patches on both sides.
• Acquired Bilateral Nevus of Ota-like Macules: Characterized by being smaller than melasma and somewhat resembling freckles.

However, since the two conditions often appear together or are difficult to distinguish, an accurate diagnosis at a dermatology clinic is essential.

Pigment lasers are the most effective treatment for Ota nevus and acquired bilateral nevus of Ota-like macules. In the past, surgical treatment was also used for Ota nevus, but it often resulted in significant scarring.

Generally, pigment lasers include Q-switched lasers and PicoWay Lasers. In the past, Q-switched lasers were commonly used, but PicoWay Laser is now known to be more effective.

PicoWay Laser uses a much shorter pulse duration than conventional Q-switched lasers to selectively destroy melanin cells.

• It breaks down pigment into tiny fragments, which can reduce damage to surrounding skin.
• It can remove pigment more powerfully than conventional nanosecond lasers.
• It has the advantages of fewer side effects and faster recovery.

Generally, at least 5 treatment sessions are required at intervals of one to three or six months, but good results can be expected after treatment, so dermatologists frequently use it for Ota nevus and Ota-like nevus treatment.

Ota nevus and acquired bilateral nevus of Ota-like macules are conditions that do not disappear naturally, so early treatment is essential. Therefore, if you have bluish spots, it is very important to visit a dermatology clinic for an accurate diagnosis and to choose the appropriate treatment method.

Even Ota nevus, which was previously known to be difficult to treat, can now be effectively managed with consistent treatment and care to restore clear skin. After treatment, it is essential to consistently use sunscreen and moisturize at home.

Today, we looked at how to distinguish and treat Ota nevus and acquired bilateral nevus of Ota-like macules. If you have any further questions, please feel free to contact us.