melanosis

/,melə'nousis/

Thân thiện

A dermatologist examines a patient's skin for signs of melanosis.

Definition

Noun: 1. A medical condition involving abnormal deposits of melanin: Melanosis refers to a pathological state where an excessive amount of the dark pigment melanin accumulates in the body's tissues, most commonly observed in the skin.

Usage

Melanosis is a technical medical term. It is used to describe a specific pathological finding, not a normal tan or natural skin color. * It is typically used as a singular, uncountable noun (e.g., the melanosis). * It often appears in clinical descriptions, diagnoses, and medical literature.

Examples

• The dermatologist diagnosed the patient with melanosis after observing the dark, patchy discoloration.
• Melanosis coli is a benign condition characterized by pigmentation of the colon's lining.
• The biopsy confirmed that the skin darkening was due to melanosis and not a malignant process.

Advanced Usage

• The term is frequently modified to specify the location or type of the condition.
  • Ocular melanosis (affecting the eye).
  • Smoker's melanosis (associated with tobacco use, often in the mouth).
• It can be part of a differential diagnosis, where a doctor considers it among other possible causes of hyperpigmentation.

Variants and Related Words

• Melanotic (adjective): Pertaining to or affected by melanosis.
  • The lesion had a melanotic appearance.
• Melanism (noun): While sometimes used interchangeably in non-technical contexts, more broadly refers to an increased amount of black or dark pigment in an organism, often used in biology (e.g., ).
• Hyperpigmentation (noun): A more general term for the darkening of an area of skin, which can be caused by various factors, including melanosis.

Synonyms

• Hyperpigmentation (general term)
• Pigmentation disorder (general term)

Antonyms

• Hypopigmentation (abnormal lightening of the skin)
• Depigmentation (complete loss of skin color, e.g., vitiligo)

Notes

• Melanosis itself is a descriptive term for the pigment deposit and is not a single disease. It is a sign that can be associated with various underlying conditions, ranging from benign (e.g., friction) to those requiring medical attention.
• It should not be confused with a melanoma, which is a specific and serious type of skin cancer arising from melanin-producing cells.

Học thuật

Noun

1. a condition characterized by abnormal deposits of melanin (especially in the skin)

Từ đồng nghĩa

• melanism