William Aird
Professor of Medicine at Harvard Medical School #Hematology #MedEd Founder of @TheBloodProjec1
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1/3 MICROCYTIC HYPOCHROMIC ANEMIA OF INFLAMMATION Yesterday, I posted a poll asking whether you would predict a patient's ferritin to be low or high based on their CBC, selected...
1/3 NAMING OF POIKILOCYTES Metaphors involve mapping source (SD) and target domains (TD). The SD is the conceptual domain from which we draw metaphorical expressions (e.g., a t...
1/3 2 CASES OF ITP BOTH WITH MICROCYTOSIS I posted CBCs from 2 patients with ITP and asked what differed between the two cases. ANSWER: One has thalassemia trait, the other has...
1/8 IRON DEFICIENCY (ID) AND DELUSIONAL PARASITOSIS Just when I thought I had pretty much seen it all in patients with ID, I was asked to consult on a young F this week who prese...
1/6 LYMPHOCYTOPENIA (aka lymphopenia) A) Definition Absolute L count < 1,000/microliter or 1.0 x 10^9/L https://t.co/Ue9FwWVNNj
1/3 Hb THRESHOLDS TO DEFINE ANEMIA I tweeted a poll earlier today asking whether you would investigate an otherwise healthy 55 yo M with Hb 13.1. So far about 600 have responded...
1/4 EPONYMS IN HEMATOLOGY - PELGER-HUET ANOMOLY Named after Karel Pelger (1885-1931), a Dutch specialist in tuberculosis and Gauthier Huet (1879-1970)), a Dutch pediatrician. htt...
1/7 RELATIONSHIPS BETWEEN RBC INDICES RBC count a. Used to calculate the Hct (Hct = MCV x RBC count) b. Used by some to predict iron deficiency vs. thalassemia (e.g., Meltzer in...
1/4 APPROACH TO NORMOCYTIC ANEMIA This is the most common type of anemia, and its differential diagnosis can sometimes feel overwhelming, and 'all over the place'. The following...
1/5 COAGULATION IN VITRO/IN VIVO In vitro (test tube): 1. The clotting cascade in plasma is activated by the addition of a negative charge, which activates the intrinsic pathway...
1/5 BARIATRIC SURGERY AND IRON DEFICIENCY ANEMIA (IDA) A) DEFINITIONS: Bariatric surgery = weight loss surgery, includes: 1. Gastric band 2. Gastric sleeve 3. Gastric byp...
1/6 NORMOCYTIC, NORMOCHROMIC IRON DEFICIENCY ANEMIA (IDA) We tend to think of IDA as being microcytic (more consistently than hypochromic). However, there are certain situations...