Because standard risk stratification based on IPSS-R and the expression levels of PDCD1, TIGIT, CD47, and KIR3DL2 were significantly associated with the prognosis of MDS patients, these were all used to construct a nomogram model to visually predict the 1-, 2-, and 3-year survival rates for MDS patients in the GSE114922 dataset (Figure 5(a)). The gene discussed is PDCD1; the disease is myelodysplastic syndrome.