There is no clear conclusion on how long PBC can live, mainly because PBC may be caused by a variety of diseases, such as aplastic anemia, acute leukemia, myelodysplastic syndrome, systemic lupus erythematosus and so on. 1. Aplastic anemia: it can be treated with cyclosporine, erythropoietin, colony-stimulating factor, etc. to promote bone marrow hematopoiesis, and if the treatment is effective, the patients will have a long survival period. 2. Acute leukemia: acute leukemia can also lead to a decrease in the number of whole blood cells, but there are different types of leukemia, if it belongs to the acute myeloid leukemia with a high risk of prognosis, the degree of malignancy is high, and the survival period is very short. On the other hand, acute promyelocytic leukemia can be treated with arsenite, retinoic acid and other drugs to obtain a longer survival period. 3. Myelodysplastic syndromes: patients with myelodysplastic syndromes, due to bone marrow pathological hematopoiesis will also lead to a decrease in whole blood cells, clinically, most of them are given targeted treatment and combined chemotherapy (cytarabine, decitabine), with an irregular survival period. 4. Systemic lupus erythematosus: Prednisone and other glucocorticoid drugs can be used to treat the disease, and if the treatment is effective, it can prolong the survival of patients. In addition, Pancytopenia can also be seen in severe liver disease and severe infections, etc., survival is not fixed, specific disease diagnosis and treatment should be carried out under the guidance of physicians.