Symptoms and Signs- Differential Diagnosis of Platelets
Reduced Production Bone marrow failure Platelets 79 Myeloma, myelofibrosis, marrow infiltration (lymphoma, carcinoma), anaemia (megaloblastic, aplastic), leukaemia Drugs: (cytotoxics, chloramphenicol, alcohol), radiotherapy Reduced Megakaryocytes: chemicals, drugs (e.g. co-trimoxazole), viral infection Increased Destruction/consumption Autoimmune (ITP) SLE, CLL, lymphoma Infections (malaria, viral, e.g. HIV) Drugs (e.g. analgesics, antibiotics, anticonvulsant, anti-diabetics, heparin, quinine, quinidine) DIC, TIP, HUS Sequestration: splenic pooling due to splenomegaly Dilutional loss (massive transfusion of stored blood) Artifactual: blood clotting in the samplep Functional disorders Bernard-Soulier disease Glanzmann's thrombasthenia Storage pool disease Liver disease, myeloproliferative disorders, paraproteinaemia, aspirin, uraemia Increased Platelets (thrombocytosis) Secondary Blood loss Infection Inflammation (e.g. Kawasaki's disease) Mailgnancy (e.g. Hodgkin's disease) Splenectomy Trauma/surgery Primary Essential thrombocythaemia Polycythaemia vera Myelofibrosis (initially, later thrombocytopenia) Myelodysplasia CML
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