Category: Systems

Clinical Correlations


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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Erythrocyte Index

By Michael Ford, MD

Faculty Peer Reviewed

“Blood Count”

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

120
Lifespan in days of an erythrocyte[2]

2.5 million
# …

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Mystery Quiz

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

The patient is an 84 year old man who presents with small amounts of hemoptysis for one week prior to admission. He is a life-long non-smoker who began having cough with sputum production for one year without fever, chills, nightsweats, …

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