Heme Clinical Manifestations Flashcards
general thrombocytopenia
SUPERFICIAL bleeding. Purpura (skin and MM). Petechia (Mostly on the LE). Ecchymoses. Do not blanch under pressure.
immune thrombocytoenic purpura
often asymptomatic.
mucocutaneous bleeding.
Not associated with splenomegaly.
heparin induced thrombocytopenia
Bleeding.
Venous thrombosis, gangrene, organ infarction, and skin necrosis.
disseminated intravascular coagulation (DIC)
bleeding- oozing from venipuncture sites, catheters, drains.
extensive bruising.
thrombosis-gangrene or multi organ failure.`
hemophilia a and b
deep bleeding in JOINTS or MUSCLE BEDS.
Chronic disability due to swelling, deformity, severe pain, and limited rom due to repeated joint hemorrhages.
GI bleeding and brain bleeding.
factor v leiden mutation
pain, swelling and tenderness, mc in LE
protein c or s deficiency
increased incidence of DVT/PE
warfarin induced skin necrosis
Hemolytic anemia
jaundice
pigmented gallstones
sickle cell trait
asymptomatic and not anemic unless exposed to severe hypoxia, extreme physical stress, dehydration or high altitude.
episodic hematuria or isosthenuria due to kidney papillary necrosis.
splenic infarction at high altitude and sudden death with prolonged exercise or physical training.
Sickle Cell Disease
Dactylitis is common initial presentation (inflammation of fingers & toes -> sausage fingers)
Infections -> functional asplenia (from repeated splenic infarctions) leads to increased risk of encapsulated organisms)
Splenic sequestration crisis -> vasoocclusion in the spleen & RBC pooling in the spleen
Painful vasoocclusive “crisis” -> triggers by hypoxia, cold weather, infection, etc. Abrupt onset of pain (chest, back, abdominal, bone). Renal or hepatic dysfunction. Priapism common.
Bony vasoocclusion -> can lead to avascular necrosis of bones
Stroke -> 25% of patients have a stroke by age 45
Thalasemmias
- Ineffective erythropoiesis- anemia, bone pain & fracture, hepatomegaly, splenomegaly
- Hemolysis- anemia, gallstones
- Iron deposition in visceral organs- endocrine dysfunction, liver cirrhosis, arrhythmia & heart failure
alpha thalassemia- aka hemoglobin h disease
At birth- jaundice & anemia
Excess beta chains form insoluble beta chain tetramers (Heinz bodies).
Heinz bodies in RBCs leads to their destruction by the spleen.
beta thalassemia major (Cooley’s Anemia)
Symptoms begin after 6 months of age.
Decreased production of beta globin chains.
Decreased beta chains leads to an increase of alpha chain production but the alpha chains aren’t able to form tetramers (because they need two beta chains).
This leads to ineffective erythropoiesis and shortened RBC life span.
Anemia can be so severe that it leads to irritability, dyspnea and mental delays.
Patients typically have osteoporosis by age 10.
G6PD deficiency
asymptomatic until times of oxidative stress.
Episodic hemolytic anemia.
Neonatal jaundice.
Hereditary spherocytosis (HS)
Recurrent episodes of hemolysis (anemia, jaundice & splenomegaly) are the hallmark.
Increased pigmented gallstones