In accordance with the WHO classification [10], among CRCs, PDA could be categorized as having a signet-ring cell component if present and might have affinity to SRCC; however, the present case scarcely had a component of signet-ring cells and had a histological appearance resembling malignant lymphoma confirmed by negative immunohistochemical staining for CD45. The gene discussed is PTPRC; the disease is Patent ductus arteriosus.