Melanosis

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Melanosis

Melanosis (/mɛləˈnoʊsɪs/) is a medical condition characterized by the excessive production of melanin, the pigment responsible for the color of skin, hair, and eyes.

Etymology

The term "Melanosis" is derived from the Greek word "melas", meaning "black", and the suffix "-osis", which is used in medical terminology to denote a disorder or abnormal condition.

Definition

Melanosis is a form of hyperpigmentation that results in dark patches on the skin. It is caused by an increase in the production of melanin, often as a result of sun exposure, hormonal changes, or certain medications. Melanosis can occur anywhere on the body, but it is most commonly seen on the face, neck, and hands.

Types of Melanosis

There are several types of melanosis, including:

  • Melanosis coli: A condition characterized by dark pigmentation of the colon. It is often associated with chronic laxative use.
  • Melanosis cutis: A form of melanosis that affects the skin. It is often caused by sun exposure or hormonal changes.
  • Ocular melanosis: A condition characterized by increased pigmentation in the eye. It can lead to vision problems if not treated.

Related Terms

  • Melanin: The pigment responsible for the color of skin, hair, and eyes.
  • Hyperpigmentation: A condition characterized by dark patches on the skin. Melanosis is a form of hyperpigmentation.
  • Melanoma: A type of skin cancer that develops from melanocytes, the cells that produce melanin.

See Also

External links

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