Brodie's abscess of the patella.
D000038:Abscess / Q000209:etiology*; D000328:Adult; D006801:Humans; D007718:Knee Injuries / Q000150:complications; D008297:Male; D010019:Osteomyelitis / Q000209:etiology*; D010329:Patella; D013203:Staphylococcal Infections / Q000382:microbiology; D013210:Staphylococcus / Q000302:isolation & purification; D013577:Syndrome