IM Board Review: A medical mystery every month
Nearly every month for the past 8 years we have asked you the reader to unravel a complicated case.
J.D. CLOUGH

  Should the actual or the corrected serum sodium be used to calculate the anion gap in diabetic ketoacidosis?
The two values have different uses: use the measured value to calculate the anion gap and the corrected value to assess dehydration.
L.H. BECK

  Should we still be using theophylline to treat asthma?
With better drugs available, theophylline has been relegated to fourth-line status.
M.M. VIELHABER and M. KAVURU

Noninvasive positive pressure ventilation in acute respiratory failure: Does it improve outcomes? 
Why insert an endotracheal tube when a mask may do?
A.C. ARROLIGA

Heat illness: Tips for recognition and treatment 
Heat stroke is an acute, life-threatening emergency. Early recognition and rapid cooling are essential.
T.A. WATERS

Myocardial infarction in a 24-year-old woman
What is the cause of this patient’s symptoms? A self-test on a clinical case.
S.T. SRIDHARAN and B.F. MANDELL

Prevention and treatment of pressure ulcers: What works? What doesn’t?
Although pressure ulcers continue to confound our best efforts, their incidence can be reduced and their healing can be speeded.
D.R. THOMAS

Update on peripheral vascular diseases: From smoking cessation to stenting
Despite advances, the two most important treatments remain the same: stopping smoking and starting a walking program.
D. MUKHERJEE and J.S. YADAV

Letter to the Editor