Idiopathic guttate hypomelanosis

Idiopathic Guttate Hypomelanosis

File:Idiopathic Guttate Hypomelanosis.jpg

Idiopathic Guttate Hypomelanosis on the skin

Idiopathic guttate hypomelanosis (IGH) is a common benign skin condition characterized by small, white, flat spots. The condition is often found on the shins and forearms and is more common in older individuals and those with fair skin.

Etiology

The exact cause of IGH is unknown, hence the term "idiopathic". It is thought to be due to a decrease in melanocyte function, leading to a decrease in melanin production. This results in the appearance of small, white spots on the skin.

Clinical Features

IGH presents as small, white, flat spots that are 1-5mm in diameter. These spots are typically found on sun-exposed areas of the body, such as the shins and forearms. They are asymptomatic and do not cause any discomfort or itching.

Diagnosis

Diagnosis of IGH is typically made clinically, based on the characteristic appearance of the lesions. A skin biopsy is not usually necessary, but if performed, it would show a decrease in melanin in the affected skin.

Treatment

There is no cure for IGH, and treatment is not usually necessary as the condition is benign and does not cause any symptoms. However, some people may choose to have treatment for cosmetic reasons. Treatment options include topical retinoids, cryotherapy, and laser therapy.

Epidemiology

IGH is more common in older individuals and those with fair skin. It is also more common in women than in men. The prevalence of IGH increases with age, with up to 50% of individuals over the age of 40 having some degree of IGH.

See Also

• Melanocyte
• Melanin
• Skin biopsy
• Cryotherapy
• Laser therapy