Etymed
pyarthrosis
Definition
An abnormal condition characterized by the presence of pus within a joint
Clinical context
A 35-year-old IV drug user presents with severe knee pain, swelling, and fever. Physical examination reveals warm, erythematous knee with limited range of motion. Joint aspiration shows purulent fluid with gram-positive cocci on Gram stain. The patient is diagnosed with pyarthrosis secondary to septic arthritis. Prompt drainage and antibiotic therapy are initiated to prevent joint destruction and systemic complications.
Mnemonic
Pus in the joint = Pyarthrosis (PYR = PUS, ARTHR = JOINT)