Clavus detected incidentally by positron emission tomography with computed tomography.

This is the first report showing that positron emission tomography with computed tomography (PET/CT) can detect clavus. A 37-year-old woman diagnosed with epithelioid sarcoma on her left inguinal region was investigated by whole-body PET/CT. The imaging showed some 18F-fluorodeoxyglucose uptake at the right lateral foot. There had been a clavus in exactly the same region. Every dermatologist, radiologist and oncologist needs to know about this finding for making an accurate diagnosis.