Category: Systems

Clinical Correlations


Medicine by the Numbers: Blood Count

By Michael Ford, MD

Faculty Peer Reviewed

  

                                             

2.65 x 10[13]
# of erythrocytes in circulation, assuming Hematocrit 45%[1]

 
 

 
 

120
Lifespan in days of an erythrocyte[2]

 
 

 
 

2.5 million
# of new erythrocytes produced each second to replace dying cells†

 
 

 
 

5.3 million
# …

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Mystery Quiz- The Answer

Vivian Hayashi MD and Robert Smith MD, Mystery Quiz Section Editors

The answer to the mystery quiz is pulmonary artery aneurysm. The chest CT shows a very round lesion in the left lower lobe with possible surrounding ground glass opacity. This perfectly round shadow suggests a vascular …

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