The following left hand x-ray is from a 70 year old woman experiencing pain and swelling in the left index finger. What can be seen?[peekaboo_link name=”Answer”]Answer[/peekaboo_link] [peekaboo_content name=”Answer”]
The x-ray shows abnormality around the distal IP joint of the index finger and there are well-defined punched out, periarticular erosions with overhanging margins. There is a surrounding soft tissue swelling which is compatible with a tophus. These findings are consistent with a tophaceous gout.
Causes of distal IP joint arthritis are:
- Psoriatic arthritis
In contrast, rheumatoid arthritis involves the PIP joint.[/peekaboo_content]