Receptor tyrosine‐kinase‐like orphan receptor 1 (ROR1) is an orphan‐receptor tyrosine‐kinase‐like surface antigen, rarely expressed in normal adult tissues; however, its expression has been detected in certain cases of B‐cell malignancies, cancer cells, as well as in various tissues during embryogenesis.6 The gene discussed is ROR1; the disease is cancer.