A 35 year old female with rheumatoid arthritis presents with pain and tightness behind of the left leg. On examination there is evidence of a swelling in the popliteal fossa of the left knee. What investigation should be organised? red bodycon knee length dresses
A Ultrasound of popliteal fossa
B D dimers
C MRI of knee
...
D Arthroscopy
E Routine bloods