Haematology Flashcards
Which translocation is seen in 95% of CML (chronic myeloid leukaemia) patients
t(9:22) - Philadelphia chromosome
Which translocation is seen in 25% of adult ALL patients and carries a poor prognosis
t(9:22) - Philadelphia chromosome
Which condition is the translocation t(15:17) fusion of PML and RAR-alpha genes commonly seen in
Acute promyelocytic leukaemia (M3) of AML
Which translocation is most commonly seen in Burkitt’s lymphoma
t(8:14) MYC oncogene
Which haematological condition is the translocation t(11:14) involving BCL-1 most commonly seen in
Mantle cell lymphoma
Which blood tests can be used to confirm a diagnosis of TRALI
Anti-HLA, antineutrophil antibodies
What are the indications for irradiated blood products
Neonates, NHL, immunosuppressed, post-BM transplant
What triad of symptoms is associated with GVHD
Skin rash, liver dysfunction, diarrhoea
What is the treatment of acute GVHD
IV pulse methylprednisolone
What is seen on a blood film in IDA
Target cells, pencil poikilocytes
Where is iron absorbed
Upper small intestine
How is iron transported in the body
Fe3+ - transferrin
What transferrin saturation suggests IDA
<16%
Which chromosome contains the 2 genes for alpha globin subunit
Chr 16
Which chromosome contains the gene for beta globin subunit
Chr 11
What is normal adult haemoglobin made of
2 alpha 2 beta subunits
What is fetal haemoglobin made of
2 alpha 2 gamma subunits
What is seen in 3 gene deletion alpha thalassaemia
HbH disease - hypochromic microcytic anaemia, splenomegaly
What is the inheritance pattern of beta-thalassaemia
Autosomal recessive
What causes a raised HbA2
Beta-thalassaemia trait
What causes bone marrow expansion with ‘hair on end’ appearance
Beta-thalassaemia major (2 gene deletion)
What is the treatment of beta-thalassaemia major
Transfusion programme with iron chelation
What are the causes of megaloblastic macrocytic anaemia
B12 deficiency, folate deficiency
What is the most specific test for pernicious anaemia
Anti-IF Ab
What are the causes of pure red cell aplasia
Thymoma, autoimmune, lymphoproliferative disorders
What causes a low haptoglobin
Intravascular haemolytic anaemia
What are the causes of extravascular haemolytic anaemia
Sickle cell, thalassaemia, hereditary spherocytosis, haemolytic disease of the newborn, warm AIHA
Which test can be used to diagnose autoimmune haemolytic anaemia
Positive direct antibody test (Coomb’s test)
What are the symptoms of cold AIHA
Raynauds, acrocyanosis
Which antibody is present in warm AIHA
IgG Ab
What are the causes of warm AIHA
RA, SLE, CLL, drugs (penicillin, cephalosporins, NSAIDs, levodopa, quinidine)
Which surface proteins are missing in paroxysmal nocturnal haemoglobinuria
CD55, CD59
Which condition causes dark morning urine and recurrent thrombotic events
Paroxysmal nocturnal haemoglobinuria
Which red cell enzyme defect results in low glutathione
G6PD deficiency
What can trigger haemolysis in G6PD patients
Aspirin, anti-malarials, sulpha-drugs, favs beans, infection, ciprofloxacin, nitrofurantoin
What is the most common hereditary haemolytic anaemia in Europe
Hereditary spherocytosis
What condition presents with jaundice, gallstones, splenomegaly and raised MCHC on bloods
Hereditary spherocytosis
Which condition is diagnosed with eosin-5-maleimide test
Hereditary spherocytosis
Which condition is caused by horizontal membrane protein defects in RBCs
Hereditary elliptocytosis
Which chromosome is affected in sickle cell disease
Chr 11 - beta globin chain
Which shift does sickle cell cause on oxygen dissociation curve
Right shift - lower affinity for O2
Which drug can be used to reduce the incidence of acute chest syndrome in sickle cell disease
Hydroxycarbomide
Which condition leads to iron deposits in the motochondria of RBCs
Sideroblastic anaemia (ring sideroblasts)
What acquired causes can lead to sideroblastic anaemia
Lead, alcohol, myelodysplasia, anti-TB medication, chloramphenicol
What treatment can be used for sideroblastic anaemia
Pyridoxine
Which chromosome is the HFE gene located
Chr 6
Which Epo-secreting tumours can lead to secondary polycythaemia
Cerebellar haemangiomas (VHL), hypernephromas, HCC, uterine fibroids
What are the major diagnostic criteria for PRV
Hb >185 (male)/>165 (female) or red cell mass >25% of normal, JAK2 mutation
Which condition causes a left-shift of the oxygen dissociation curve and tissue hypoxia due to oxidisation of Fe2+ to Fe3+
Methaemoglobinaemia
Which condition is characterised by low 02 sats but normal pO2
Methaemogolbinaemia
Which autosomal recessive condition causes aplastic anaemia, cafe au lait spots and increased risk of AML
Fanconi’s anaemia
What is the most prognostic test in AML
Cytogenetics of BM - for Chr 5q or 7q deletions
Which haematological malignancy stains positive for Sudan Black
AML
Which condition is Auer rods pathognomonic for
Acute promyelocytic anaemia (M3)
What is the treatment of acute promyelocytic leukaemia
All-trans-retinoic acid
What is the treatment of CML
Imatinib, hydroxycarbomide, interferon-alpha, BM transplant
Which condition causes Dohle bodies in white cells and increased leukocyte ALP
Leukaemoid reaction
What causes a low leukocyte alkaline phosphatase
TTP, CML, PNH, hereditary hypophosphatasia
Which condition is terminal deoxynucleotide transferase (TDT) seen in
ALL
What is the most common translocation in ALL
t(12;21)
Which cells are responsible for 99% of CLL
B cells
Which haematological cancer shows smudge cells on blood film
CLL
What is the best investigation for CLL
Flow cytometry - immunophenotyping shows CD19 positive B cells
What treatment is given for CLL when indicated
FCR (fludarabine, cyclophosphamide, rituximab)
What is the most common chromosome abnormality in CLL
Chr 13q deletion
Which conditions cause a ‘dry tap’ on BM biopsy
Hairy cell leukaemia, myelofibrosis
Which haematological condition is TRAP stain positive
Hairy cell leukaemia
What is first line treatment of hairy cell leukaemia
Purine analogue chemotherapy - cladribine, pentostatin
What is the most common type of Hodgkin’s lymphoma
Nodular sclerosing
Which type has the worst prognosis in Hodgkin’s lymphoma
Lymphocyte depleted
What stage of Hodgkin’s Lymphoma is a patient with cervical LN enlargement and spleen involvement
III
What chemotherapy is used for Hodgkin’s lymphoma
ABVD (adriamycin, bleomycin, vincristine, doxorubicin)
Which cancer involves the maxilla and mandible and is typically seen in African children
Burkitt’s lymphoma - African form
What tumour is most common in the sporadic form of Burkitt’s lymphoma
Ileo-caecal tumours
Which gene translocation is most common in Burkitt’s lymphoma
C-MYC translocation t(8;14)
Which condition is thyroid maltoma associated with
Hashimoto’s
What is the treatment of tumour lysis syndrome
Hydration, allopurinol/rasburicase
What is the most common gammopathy in multiple myeloma
IgG gammopathy
What are the major criteria for diagnosing multiple myeloma
> 30% monoclonal plasma cells in BM, monoclonal proteins in blood/urine, plasmacytoma on biopsy
What radiological finding is seen on imagine of the skull in myeloma
Rain-drop skull
What % of MGUS transforms to myeloma by 5 years
10%
What are the differentiating features betweeen MGUS and myeloma
MGUS has normal B2-microglobulin, lower level of paraprotein, no BJP, no clinical features/organ damage
Which condition has high levels of IgM resulting in hyperviscosity syndrome
Waldenstrom’s macroglobulinaemia
What are the symptoms of POEMS syndrome
Polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, skin changes
What are the causes of inherited thrombophilia
Protein C deficiency, Protein S deficiency, Antithrombin III deficiency, Factor V Leiden
What is the pathophysiology of Factor V Leiden
Mutation in Factor V Leiden gene impairs ability of activated protein C and S to inactivate factor Va
What is the increased risk of VTE in Factor V Leiden homozygotes
50x increased risk
What does heparin bind to
Antithrombin III
What is the treatment of recurrent VTE on treatment in APLS
Lifelong warfarin INR 3-4
When should LMWH be commenced in APLS in pregnancy
Once fetal heartbeat seen on USS
What is the clinical picture of HIT
> 50% drop in platelets + thrombosis + skin rash , 5-10 days after exposure to heparin
What does Beriplex (PCC) contain
Factors II, VII, IX, X
What are antibodies directed against in ITP
Antibodies against glycoprotein IIb-IIIa
What is Evan’s syndrome
ITP + AIHA
What is the pathogenesis of TTP
Abnormally large sticky vWF causes platelets to clump in vessels
What deficiency is present in TTP
ADAMTS13
What are the features of TTP
PENTAD (pyrexia, endothelial damage, neurological abnormalities, thrombocytopenia with purpura, MAHA with schistocytes, damage to kidneys)
What is the treatment of TTP
Urgent plasmapheresis with FFP
What chromosome is involved in von Willebrand’s disease
Chr 12
What is seen on blood tests in vWD
Prolonged bleeding time, mildly reduced factor VIII, reduced platelet aggregation with ristocentrin
What is the treatment of vWD
Tranexamic acid, desmopressin, intermediate purity factor VIII
What is haemophilia C
Autosomal recessive deficiency of factor XI
What are the causes of prolonged APTT
Haemophilia, heparin, von Willebrand’s disease, antiphospholipid syndrome
What is the MOA of tranexamic acid
Competitively inhibits activation of plasminogen, thereby reducing conversion of plasminogen to plasmin
Which factors are involved in the extrinsic pathway
Factor III (Tissue factor), Factor VII
Which deficiency has prolonged PT but normal APTT
Factor VII deficiency
What are the 4 diagnostic criteria for hereditary haemorrhagic telangiectasia
Epistaxis, telangiectases, visceral lesions (GI, pulmonary, hepatic, cerebral, spinal AV malformations), FHx
What haematological condition gives a characteristic burning sensation in the hands and is associated with JAK2 mutation
Essential thrombocytosis
What is the pathogenesis of myelofibrosis
Hyperplasia of abnormal megakaryocytes causes increased PDGF which stimulates fibroblasts
What does myelodysplastic syndrome show on blood film and BM biopsy
Blood film - small blasts, BM biopsy - ring sideroblasts
Which haematological cancer is malaria associated with
Burkitt’s lymphoma
What is given as prophylaxis for neutropenic sepsis
Fluoroquinolone (e.g. ciprofloxacin)
What drugs can cause pancytopenia
Cytotoxics, trimethoprim, chloramphenicol, penicillamine, carbimazole, sulphonylureas, carbamazepine
What is the treatment of aplastic anaemia
Anti-thymocyte globulin, anti-lymphocyte globulin + steroids
What are the causes of hyposplenism
Splenectomy, sickle cell, SLE, amyloid, Grave’s, coeliac
What are the causes of eosinophilia
NA ACCP (neoplasia, addison’s, asthma/allergy, collagen vascular disease, cholesterol emboli, parasites)
Which blood product has the highest risk of bacterial contamination
Platelets
What are the most common organisms in neutropenic sepsis
Gram positive cocci - staph epidermidis
What is 0 on ECOG score in cancer assessment
Fully active performance status
What are the causes of gingival hyperplasia
Phenytoin, cyclosporine, CCB, AML
What is raised on FBC in PRV
Hb, HCT, neutrophils, basophils (plts raised in 50%)
What is the treatment of methaemoglobinaemia
Methylthioninium chloride (methylene blue)
What is the treatment of acute chest syndrome in sickle cell disease
O2 therapy, IV fluids, analgesia, incentive spirometry, ABx cover, early discussion with critical care
What blood results are seen in cryoglobulinaemia
Low C4, raised ESR
What drug is used to prevent haemorrhagic cystitis in cyclophosphamide use
Mesna
What does a low leukocyte alkaline phosphatase score indicate
A high presence of immature WBC on peripheral blood smear
What are the classic features of acute intermittent porphyria
Abdominal and neuropsychiatric symptoms in 20-40 year olds, urine turns deep red on standing
What blood type is the universal donor of FFP
AB (doesn’t have any antibodies)
What does cryoprecipitate contain
Factor VIII:C, vWF, fibrinogen, Factor XIII, fibronectin
Which translocation confers good prognosis in AML
t(15:17)
Which condition can affect almost every organ system including biliary and salivary, and is analogous to sarcoidosis
IgG4-related disease
Which condition is likely to cause SOB and hypertension after a blood transfusion
TACO
Which cancer has a ‘starry sky’ appearance on microscopy
Burkitt’s lymphoma
Which syndrome is linked to pollen allergies and presents with seasonal variation
Oral allergy syndrome
What is the best test for hereditary angioedema in between attacks
C4 level
Which haematological malignancy demonstrates an increase in granulocytes at different stages of maturation
CML
What are the acquired causes of methaemoglobinaemia
Sulphonamides, poppers/nitrates, dapsone, Na nitroprusside, primaquine, aniline dyes
What deficiency causes congenital methaemoglobinaemia
NADH methaemoglobin reductase deficiency
What causes recurrent pneumonia to occur in CLL
Hypogammaglobulinaemia
What are the features of Wiskott-Aldrich syndrome
Thrombocytopenia, low IgM, recurrent bacterial infections, eczema
What electrolyte abnormality might you see with repeated blood transfusions
Low calcium (binds to citrate)
What is the schilling test
For pernicious anaemia (measures urine B12 after IF)
Which gene is associated with waldenstrom’s macroglobulinaemia
MYD88
What causes rouleaux formations on blood film
Increase in immunoglobulins (MM, macroglobulinaemias)
What is first line treatment of hyperviscosity syndrome in WM
Plasmapheresis
What are the acquired causes of sideroblastic anaemia
Myelodysplasia, lead poisoning, alcohol abuse, copper deficiency
What is the management of severe pain in painful sickle cell crisis
IV diamorphine
What is the long term treatment of TTP where plts <50
Aspirin
What causes autoimmune haemolytic anaemia in CLL
Auto reactive T cell induction
What is the triad of symptoms of viscosity syndrome
Mucosal bleeding
Visual changes
Neurological symptoms
Which type of HIT is associated with risk of thromboembolism
Type 2 HIT (Plts <50)
When should cryoprecipitate be given in DIC
Fibrinogen <1g/L
Which haem condition can present with cytopenia 5 years after chemotherapy
Myelodysplastic syndrome
When are CMV-seronegative blood products used
Intrauterine and neonatal transfusions, elective transfusion of a pregnant woman
When are washed blood products used
Patients with history of recurrent and severe allergic transfusion reactions
What is the treatment of HIT
Stop any form of heparin and anticoagulate with argatroban or danaparoid