Question

25yo woman in Haiti has recurrent swellings of the left leg up to the groin. Although the swellings have resolved spontaneously up to this point, there is a 2cm difference in the diameter of her legs measured 10cm below the patella. WBC count is remarkable at 12,500/mm3 with 40% eosinophils. Examination of which of the following may be helpful in making the causal diagnosis?

Skin snip

Soft-tissue radiograph of the left thigh

Blood

Urine

Muscle biopsy