Abstract: Objective To analyze the characteristic of laboratory examination and clinical diagnosis for improving the recognization of panmyelosis. Methods The clinical laboratory data including bone marrow cell morphology, cytochemistry, flow cytometry and bone marrow pathological biopsy in a patient with panmyelosis was reported, and the literatures were reviewed. Results Granular, erythroid and megakaryocytic hyperplasia proliferations, mainly archaeocytes, were showen in bone marrow cell morphology and pathological biopsy. Immunophenotyping of abnormal cells showed in the expressions of CD34, CD117, CD33, CD41, CD61 and GlyA by flow cytometry. Conclusions The diagnosis of panmyelosis is made according to all the results of determinations.

Key words: Panmyelosis, Bone marrow, Flow cytometry, Bone marrow pathology