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Bet 2: Estimating CD4+ counts from the absolute lymphocyte count in the ED
  1. Michael Butterfield,
  2. Jason Wilson
  1. University of South Florida/Tampa General Hospital, Tampa Bay, Florida, USA
  1. Correspondence to Michael Butterfield; production.emj{at}bmj.com

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Clinical scenario

A 37-year-old patient who has never been to your hospital presents for shortness of breath. He reports a history of HIV but is not currently on treatment and does not know his last CD4+ count. His oxygen saturation is 94% on room air, and lung sounds are distant. His CXR shows possible interstitial markings in the right middle lobe, his LDH is 240, absolute lymphocyte count (ALC) is 2200 …

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