Keytruda, an immuno-cancer drug of MSD, has become the primary option in esophageal cancer, where treatments have been limited. The medical team predicted that an immuno-cancer drug-oriented treatment strategy using Keytruda or Opdivo will be established depending on the PD-L1 expression rate. At a seminar to commemorate the expansion of Keytruda indications held online by MSD Korea on the 31st, Sun Jong-moo, a professor of hematological oncology at Samsung Medical Center, pointed out the meaning of the launch of Keytruda in esophageal cancer. He said, "As immuno-cancer drugs appear in esophageal cancer, treatment strategies are changing in the direction of considering using immuno-cancer drugs from the earliest stage po