tophus

/'toufəs/
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tophus

A dentist points out a tophus on a patient's dental X-ray.

Definition
  1. Noun:
    • A chalky deposit of sodium urate: A concretion or incrustation, primarily composed of uric acid salts (urates), that forms in tissues, particularly around joints or in the external ear, characteristic of advanced or chronic gout.
    • A hard deposit on teeth: A calcified concretion, such as dental calculus or tartar, that forms on the teeth and gums.
Usage Examples
  • Noun (Medical - Gout):
    • The doctor identified the painful nodule on his elbow as a tophus, confirming the progression of his gout.
    • Chronic gout can lead to the formation of tophi, which may cause joint deformity.
  • Noun (Dental):
    • The dental hygienist removed the stubborn tophus from the patient's lower incisors during the cleaning.
Advanced Usage
  • "Tophaceous" (Adjective): Describing a condition characterized by or resembling a tophus or tophi.
    • The patient presented with tophaceous gout, requiring aggressive management.
  • Medical Diagnosis: The presence of a tophus is a pathognomonic sign, meaning it is specifically diagnostic for advanced or chronic gouty arthritis.
Variants and Related Words
  • Tophi (n): The plural form of .
    • Multiple tophi were visible on his fingers and ears.
  • Tophaceous (adj): Pertaining to or of the nature of a tophus.
    • The X-ray revealed tophaceous deposits in the joint space.
Synonyms
  • Gouty deposit: A deposit caused by gout.
  • Chalkstone: An informal, descriptive term for a tophus, referencing its chalky appearance.
  • Calculus (in a dental/medical context): A hard, stony concretion. (Note: "Calculus" is a broader term that can refer to stones in various organs, not exclusively urate deposits.)
Notes on Meaning

The word tophus has two distinct medical applications: 1. In Rheumatology: It almost exclusively refers to the urate crystal deposits associated with gout. 2. In Dentistry: It is a more technical or historical term for dental calculus (tartar), which is a different type of calcified deposit. In modern common usage, the gout-related meaning is predominant.

tophus

A dentist points out a tophus on a patient's dental X-ray.

Noun
  1. an incrustation that forms on the teeth and gums
  2. a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout

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