“…The usefulness of CK‐7, CK‐20, and GCDFP‐15 in EMPD diagnosis has been reported. 2 , 3 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 As CK‐7 is positive in primary and secondary EMPD, it could not be conclusive. Conversely, CK‐20 and GCDFP‐15 were useful in diagnosing secondary EMPD.…”