Definition

1. Noun:
   • A dermatological condition: "keratosis nigricans" is a skin disease marked by the presence of dark, thickened, velvety, wart-like patches of skin, typically appearing in body folds such as the neck, armpits, and groin. Its presence can be associated with various underlying conditions, ranging from benign (such as insulin resistance or obesity) to malignant (such as internal cancers).

Usage Examples

• Noun:
  • The dermatologist diagnosed the patient with keratosis nigricans after observing the characteristic dark patches on her neck.
  • Keratosis nigricans is often considered a cutaneous marker for insulin resistance and can be an early sign of type 2 diabetes.

Advanced Usage

• Clinical Context: The term is used primarily in medical and dermatological contexts to describe a specific cutaneous finding. It is often discussed in relation to its potential etiologies.
  • The sudden onset of extensive keratosis nigricans prompted a thorough workup for an underlying malignancy.

Variants and Related Words

• Acanthosis nigricans: This is the more precise and commonly used clinical synonym for "keratosis nigricans." The terms are often used interchangeably, though "acanthosis nigricans" is the standard term in modern medical literature.
  • The physician noted acanthosis nigricans in the patient's axillae.

Synonyms

• Acanthosis nigricans: The primary synonym, referring to the same skin condition.

Different Meanings

• This term has a single, specific medical meaning related to dermatology and internal medicine. It does not have common non-medical definitions.

Notes on Usage

• The term "keratosis nigricans" is a formal medical diagnosis. It is not used in everyday conversation.
• It is typically used as a singular noun (e.g., "The keratosis nigricans is improving.").
• The condition it describes is a symptom or sign, not a disease process itself, and its identification usually leads to investigation for an associated condition.

Noun

1. a skin disease characterized by dark wartlike patches in the body folds; can be benign or malignant