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Hori Nevus

Hori Nevus

This is also called by various name as:

  • Hori’s Nevus
  • Nevus of Hori
  • acquired bilateral naevus of Ota-like macules (ABNOM) and
  • naevus fusco-caeruleus zygomaticus

 

Hori Nevus: Hori’s naevus presents as harmless skin pigmentary disorder lesion. There are blue-grey to gray-brown in color. They occurs as patchy and spotty pigmentation. They are located on the prominence and high up of the cheeks. The condition usually appears after twenties and while entering the adulthood. It is most common in middle-aged Asian women, typically with skin type 3 and 4.

Hori Nevus: Hori’s naevus presents as harmless skin pigmentary disorder lesion. There are 1. blue-grey to gray-brown in color. 2. They occurs as patchy and spotty pigmentation. 3. They are located on the prominence and high up of the cheeks. 4. The condition usually appears after twenties and while entering the adulthood. 5. It is most common in middle-aged Asian women, typically with skin type 3 and 4.

 

 

Features of Hori’s nevus

Hori’s naevus presents as harmless skin pigmentary disorder lesion. There are

  • blue-grey to gray-brown in color.
  • They occurs as patchy and spotty pigmentation.
  • They are located on the prominence and high up of the cheeks.
  • The condition usually appears after twenties and while entering the adulthood.
  • It is most common in middle-aged Asian women, typically with skin type 3 and 4.

Note: The condition is very often misdiagnosed. This is because it may resemble or coexist with melasma. It self also can cause an uneven skin tone. 

 

Causes

The 2 most important factors, which are the genetics and hormones play a central roles in the development of Hori’s naevus.

In a normal skin, the melanocyte, which is the melanin-producing pigment cells are present only in the upper layer of skin (the epidermis) and hair follicles. There are present at the basement membrane of the epidermis.

In abnormal condition, however, when these cells are present, for whatever reason,  in the underlying area of skin, called the dermis, it causes a condition known as dermal melanocytosis. This is abnormal.

Dermal melanocytosis is a spectrum of conditions and includes

  • Mongolian spots,
  • naevus of Ota,
  • Hori’s naevus and
  • naevus of Ito.

In the dermal melanosis, the melanin is present more deeply in the skin. The colour changes from black-brown to blue-grey when it becomes deeper sited.

 

Clinical signs

Hori’s naevus presents as

  • bilateral and
  • symmetrical
  • small, greyish-brown
  • to blue-grey spots on the prominence of the cheeks and
  • less often the temples, nose, eyelids and forehead.

 

Hori Nevus: Hori’s naevus presents as bilateral and symmetrical small, greyish-brown to blue-grey spots on the prominence of the cheeks and less often the temples, nose, eyelids and forehead.

Hori Nevus:
Hori’s naevus presents as
-bilateral and
-symmetrical
-small, greyish-brown
-to blue-grey spots on the prominence of the cheeks and
-less often the temples, nose, eyelids and forehead.

 

Hori nevus differential diagnosis

Note that the condition is very often misdiagnosed. This is because it may resemble or coexist with melasma.

 

Hori’s naevus diagnosis

The diagnosis is based on clinical findings during physical examination. The signs of Hori nevus as described is the classic finding. It is always bilateral and symmetrical. Location is usually on the cheeks. Occasionally it is also present on the forehead, temple, nose and eyelid. However, in rare cases a skin biopsy is needed.

 

 

 

 

Treatment

 Nevus of Hori treatment.