In canine immune mediated polyarthritis, what does primary refer to in its pathogenesis?

In canine immune mediated polyarthritis, what does primary refer to in its pathogenesis?

• A. Triggered by another inflammatory disease
• B. Bacterial infection as trigger
• C. Idiopathic with known cause
• D. True underlying or inciting cause not identified, and disease appears to arise without obvious trigger

Answer: (D)

Primary refers to an idiopathic form of canine immune-mediated polyarthritis where no inciting cause is identified after thorough evaluation. It arises without an obvious trigger, unlike secondary forms that are linked to another inflammatory disease, infection, drug reaction, or neoplasm. The correct description captures that, despite investigation, no underlying cause is found, which is why this form is labeled primary. Descriptions that point to a specific trigger or infection describe secondary disease, and "idiopathic with known cause" is contradictory because idiopathic means unknown cause.

Primary refers to an idiopathic form of canine immune-mediated polyarthritis where no inciting cause is identified after thorough evaluation. It arises without an obvious trigger, unlike secondary forms that are linked to another inflammatory disease, infection, drug reaction, or neoplasm. The correct description captures that, despite investigation, no underlying cause is found, which is why this form is labeled primary. Descriptions that point to a specific trigger or infection describe secondary disease, and "idiopathic with known cause" is contradictory because idiopathic means unknown cause.