00:00 / 00:00
Autoimmune hemolytic anemia
Glucose-6-phosphate dehydrogenase (G6PD) deficiency
Hemolytic disease of the newborn
Paroxysmal nocturnal hemoglobinuria
Pyruvate kinase deficiency
Sickle cell disease (NORD)
Folate (Vitamin B9) deficiency
Vitamin B12 deficiency
Anemia of chronic disease
Iron deficiency anemia
Vitamin K deficiency
Langerhans cell histiocytosis
Essential thrombocythemia (NORD)
Polycythemia vera (NORD)
Acute intermittent porphyria
Porphyria cutanea tarda
Disseminated intravascular coagulation
Von Willebrand disease
Monoclonal gammopathy of undetermined significance
Thrombotic thrombocytopenic purpura
Antithrombin III deficiency
Factor V Leiden
Protein C deficiency
Protein S deficiency
Coagulation disorders: Pathology review
Extrinsic hemolytic normocytic anemia: Pathology review
Heme synthesis disorders: Pathology review
Intrinsic hemolytic normocytic anemia: Pathology review
Leukemias: Pathology review
Lymphomas: Pathology review
Macrocytic anemia: Pathology review
Microcytic anemia: Pathology review
Mixed platelet and coagulation disorders: Pathology review
Myeloproliferative disorders: Pathology review
Non-hemolytic normocytic anemia: Pathology review
Plasma cell disorders: Pathology review
Platelet disorders: Pathology review
Thrombosis syndromes (hypercoagulability): Pathology review
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Heparin Induced Thrombocytopenia (HIT)
Thrombotic Thrombocytopenic Purpura (TTP)
At the family medicine center, a mother came in with her 5 year old child, Alana.
Several days ago, Alana developed bloody diarrhea after eating undercooked ground beef and her mother noticed her face was pale and she only urinated once in the past 12 hours.
Next to her, there’s a 30 year old person named Danika, who came in complaining of increased bruising for the past several months.
She has no other symptoms and physical examination shows multiple ecchymoses on the extremities.
Both Alana and Danika are suffering from a hemostasis disorder.
Hemostasis disorders, also known as bleeding disorders, can be broadly divided into three groups.
The first includes problems with primary hemostasis, which is when there’s a problem forming the initial platelet plug, and so, they’re referred to as platelet disorders.
Now, the second group includes problems with secondary hemostasis, which is making a strong fibrin clot through activation of the intrinsic, extrinsic and common coagulation pathways, and are also known as coagulation disorders.
And the last group includes disorders that affect both primary and secondary hemostasis and are known as mixed platelet and coagulation disorders.
For this video, let’s focus on the platelet disorders.
These can be further subdivided into two categories. In the first category, there’s thrombocytopenia, which is defined as a platelet count below 150,000 per microliter, with the normal range being between 150,000 and 450,000.
Thrombocytopenia can be caused by increased platelet destruction, which can be immune-mediated, like in heparin induced thrombocytopenia, or HIT, and immune thrombocytopenic purpura, or ITP.
Other cases can be non-immune mediated, like thrombotic thrombocytopenic purpura, or TTP, and hemolytic-uremic syndrome, or HUS.
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