Frank's Sign

I think once you know this sign, you'll love looking for it.Frank's sign is a diagonal crease in the lobule of the auricle, as shown in the pic, which was a patient that I came across yesterday. (To be more specific, it's Grade 3 Frank's sign)"The sensitivity of Frank's sign reaches 75%, its specificity 57.5% and its positive predicting value 80.3%. The prevalence of Frank's sign increases