Abstract: Objective To investigate the etiology of the geratic pancytopenia(PCP). Methods Forty-five patients with geratic Pancytopenia collected from January 2009 to January 2013 in our hospital were selected and their clinical data were retrospectively analyzed. Results Among the 45 cases of geratic Pancytopenia, 31cases were non-hematologic systemic diseases, 12 cases were hematologic systemic diseases, and the other 2 cases were of other reasons. The clinical symptoms of the non-hematologic systemic diseases were mild or moderate leucopenia and anaemia, while moderate or severe decreases of three-line blood cells happened in the hematologic systemic diseases. There was a significant difference between the decrease degree of the three-line blood cells in two kinds of diseases(P<0.05). Conclusion The geratic Pancytopenia should be paid attention to. Both hematologic systemic diseases and non-hematologic systemic diseases might be its causes. The pathogenesis should be analyzed so as to reduce the rate of misdiagnosis and missed diagnosis.

Key words: pancytopenia, the elderly, etiology analysis