The bone marrow puncture was performed to rule out cancer metastasis to the bone marrow because the patient had a past history of lung cancer and showed progressive pancytopenia.
Laboratory findings
WBC 0.7×10³/μl、
RBC 3.32×106/μl、Hb 9.4g/dl、
Ht 29.1%、PLT 6.8×104/μl
MCV 87.6fl、MCH 28.3pg、MCHC 32.3%
Touch smear of aspirate for dry tap