QuestionSBA
QuestionChoice
Gout would also present with a single red, hot swollen joint. However, on joint fluid analysis gout would show negatively birefringent crystals that are needle-shaped, rather than rhomboid-shaped.
10025131
b
Gout
QuestionChoice
Rheumatoid arthritis can produce an inflammatory joint effusion that gives patients warm, swollen joints. These effusions would consist of mainly neutrophils and the gram-stain would be negative.
10025134
e
Rheumatoid arthritis
QuestionChoice
This is a typical presentation of pseudogout: a single red, hot swollen joint, most commonly affecting the wrist or the shoulder. Pseudogout causes rhomboid-shaped crystals that are positively birefringent to be seen on aspiration.
10025130
a
Pseudogout
QuestionChoice
Paget's disease of the bone would usually present as an isolated rise in alkaline phosphatase (ALP) levels alongside bone pain. This description of a single hot and swollen joint with rhomboid-shaped crystals on joint fluid analysis is more typical of pseudogout.
10025133
d
Paget's disease of the bone
QuestionChoice
Septic arthritis will produce similar symptoms to the ones described: joint pain, swelling, redness and warmth. However, individuals with septic arthritis will be be systemically unwell and have a fever, tachycardic or be hypotensive. Additionally, the joint fluid analysis results are more suggestive of pseudogout.
10025132
c
Septic arthritis
Concept
Chapter
2693
3905
pseudogout
Topic
146
Rheumatology
17424
A 66-year-old male presents to his GP with a painful, swollen left knee. On examination, it feels hot to touch. Joint fluid analysis shows rhomboid-shaped crystals that are positively birefringent.

Which of the following is the most likely diagnosis?
a