Hematology Pearls Flashcards
If the MCV is high and RDW is normal the cause is likely to be?
Alcohol
Liver disease
Aplastic anemia
Chemotherapy induced marrow failure
In Iron deficiency anemia what GI disease should be screened in all patients?
Serology for Celiac disease.
What is a functional Iron deficiency?
It is a failure to mobilize Iron stores in response to erythropoietin therapy in CKD.
Cabot ring is seen in ?
Pernicious anemia, bad infections, led poisoning
Right shift in blood ?
It is hypermatured white cells: hyper segmented polymorphs seen in megaloblastic anemia, uraemia and liver disease
Why does hypokalemia occur in pernicious anemia?
Due to absorption of potassium to hematopoietic cells.
In sickle cell anemia the life span of RBC can be as short as ?
5 days
Heinz bodies and bite cells indicate ?
Hemolytic anemia is due to G6PD deficiency
What does a + direct comb test indicate?
The presence of antibody mediated or autoimmune hemolytic anemia
What is paroxysmal cold hemoglobin uria ?
It is caused by Donath- Landsteiner antibodies sticking to RBC. Less than 2% of cold AHA. It causes self limiting hemolysis on rewarming.
What are the causes of combs negative hemolysis?
Autoimmune hepatitis
Hepatitis B and C
What are the causes of microangiopathic hemolytic anemia?
It is an intravascular hemolytic condition: causes are HUS, DIC, HELLP syndrome l
All RBC membrane defects are ?
Comb test negative
All need regular folate
All may require splenectomy
What is the Hb : reticulocytes pattern in sickle cell disease?
Hb constantly 60 to 80 and reticulocytes> 10 to 20 %
Splenic sequestration crisis is seen in only sickle cell children why ?
In adults the spleen has undergone functional asplenia or atrophy
