Daiichi Sankyo Company, Limited announced that the European Medicines Agency (EMA) has validated the Type II Variation Application for trastuzumab deruxtecan, a HER2 directed antibody drug conjugate (ADC) being jointly developed by Daiichi Sankyo and AstraZeneca, for the treatment of adult patients with locally advanced or metastatic HER2 positive gastric or gastroesophageal junction (GEJ) adenocarcinoma who have received a prior anti-HER2-based regimen.