Haem: Interactive Cases Flashcards

(44 cards)

1
Q

% Myeloblast that is abnormal

% Lymphoblasts abnormal

A
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2
Q

How to interpret FBC

A
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3
Q

B cell markers

A

CD19 - epitope for car t cells

CD20 - epitope for rituximab

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4
Q

T cell markers

A

All are CD3+

CD4 - Helper

CD8 - Cytotoxic

CD5

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5
Q

Markers of lympod differentiation

A

TdT marker of immature T an B lymphoblasts

Surface IgG is a marker of mature cells

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6
Q

List some general clinical signs of anaemia.

A
  • Pale mucous membranes
  • Tachycardia
  • Cardiomegaly/CCF
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7
Q

List some specific clinical signs of anaemia.

A
  • Koilonychia
  • Glossitis (B12 deficiency - B12 is needed for epithelial cell replacement)
  • Jaundice (haemolysis)
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8
Q

List some causes of microcytic anaemia.

A
  • Iron deficiency
  • Thalassemia
  • Anaemia of chronic disease
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9
Q

List some investigationsthat are used for anaemia.

A
  • FBC
  • Blood film
  • Reticulocyte count
  • Haemoglobin electrophoresis
  • Iron studies
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10
Q

List some physiological triggers for reticulocytosis.

A
  • Haemolysis
  • Haemorrhage
  • Haematinics (agents that stimulate RBC production)
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11
Q

List some conditions in which reticulocytes are absent.

A
  • Inadequate haematinics
  • Bone marrow failure
  • Acute major haemorrhage (reticulocyte response takes at least 6 hours)
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12
Q

What are the typical haemoglobin electrophoresis findings of thalassemia?

A
  • High HbA2 and HbF
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13
Q

List some blood film features of iron deficiency anaemia.

A
  • Pencil cells
  • Anisocytosis
  • Poikilocytosis
  • Hypochromic
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14
Q

List some causes of pancytopaenia.

A
  • Aplastic anaemia
  • Leukaemia
  • Infiltration (e.g. lymphoma, carcinoma)
  • Drugs (e.g. chemotherapy)
  • B12/folate deficiency
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15
Q

List some investigations for pancytopaenia.

A
  • Blood film
  • Vitamin B12 and folate
  • Bone marrow biopsy
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16
Q

What is a defining feature of myeloid cells?

A
  • Auer rods
  • NOTE: the presence of Auer rods means that cytochemistry and immunophenotyping is not necessary
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17
Q

Which type of major infection is classically seen in AML?

A

Gram-negative septicaemia

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18
Q

What are the principles of management of AML?

A
  • Supportive - red cell and platelet transfusions, isolation
  • Chemotherapy
19
Q

Normal vs Myeloma pathology

20
Q

List some causes of thrombocytopaenia.

A
  • Defect in platelet production - drugs, bone marrow disorders (e.g. leukaemia, myelodysplasia)
  • Increased platelet destruction - ITP, DIC, heparin-induced thrombocytopaenia
21
Q

List some investigations for thrombocytopaenia.

A
  • Coagulation screen
  • Blood film
  • Bone marrow aspirate
  • ANA/RAPA/anti-platelet antibodies (check for rheumatoid arthritis, SLE)
  • HIV (common cause of isolated platelet destruction worldwide)
22
Q

List some causes of low platelets with abnormal clotting.

A
  • DIC
  • Alcohol
  • Drugs
  • Leukaemia
23
Q

List some investigations for suspected DIC.

A
  • Blood film
  • D-dimer
  • Fibrinogen
  • Septic screen
  • LFTs
24
Q

How is DIC managed?

A
  • Antibiotics
  • Blood products
  • Regular blood tests to assess response
25
How you get spherocytes
1. Hereditary 2. Autoimmune haemolytic anaemia
26
Causes of aquired haemolytic anaemia
**Non-immune** Microangiopathic haemolytic ureamic syndrome (MAHA) Malaria Prostetic heart valves Drugs: Dapsone **Immune Mediated** Autoimmune: warm/cold antibody type Alloimmune (post blood transfusion) Drug: methyldopa, penicillin
27
Causes of inherited haemolytic anaemia
Defect in: **Hb** Sickle cell Thalassaemia **Membrane** Hereditary spherocytosis **RBC Enzymes** G6PD deficiency - would protect from oxidative stress
28
Causes of inherited haemolytic anaemia
Defect in: **Hb** Sickle cell Thalassaemia **Membrane** Hereditary spherocytosis **RBC Enzymes** G6PD deficiency - would protect from oxidative stress
29
Biochemistry in Fe deficiency
Ferritin - needs to be low (high doesnt rule out) Transferrin = High
30
Haematological picture of Pernicious anaemia
Pernicious anaemia = b12 defieicny B12 required for DNA synthesis 1st - RBC 2nd - WBC, Platelets = Pancytopenia
31
Leukoerythroblastic blood film Amongst RBC - teardrop cells + premature RBC (top Left) Myelocyte - premature - Top Right
32
Causes of Pancytopenia
33
Leukaemia - High WCC Many myelocyte precursors??? Chronic Myeloid Leukaemia (CML)
34
Clinical picture of CML + Blood film
As a result of BCR-ABL fusion between 9 and 22 Detected on RT-PCR
35
At diagnosis how do you treat CML
**Imatinib** inhibitor of tyrosine kinase associated with BCR-ABL v high respionse rate in the chronic phase
36
Month 60 after CML, developing blasts
Blast crisis (acquisition of new mutations)
37
Jak2V61F mutation Polycythemia Vera
38
Immunophenotyping - **CLL** CD19 and CD5 - Both positive Leukocytosis with all lymphocytes Not pan = chronic Peripheral blood - mature lymphocytes + **smear/smudge cells**
39
Gravest cytogenic rognosis
p53 (Chromosome 17 deletion)
40
Management of CLL based on “Brutons agammaglobinaemia”
**Ibrutinib** - “nib” = tyrosine kinase inhibitors inhibitors brutons tyrosine kinase recreating phenoytpe of inherited Brutons X linked agammaglobinaemia???
41
Multiple Myeloma 1 immunoglobulin raised, others are reduced = **immune paresis**
42
**No** Myeloma cannot be excluded Havent excluded **light chain only myeloma** - Need to **check serum free light chains** or urine for bence jones proteins
43
**Cast nephropathy** NOT AL Amyloid Cast nephropathy is statistically the most common cause of renal failure in myeloma **Super high SFLC Kappa** - light chains pass through basement membrane and prescipitate in renal tubules AL amyloid - would see congo red / apple green bifringent depositions in kidney biopsy or small bowel or heart
44
Bleeding from wound and venepuncture sites withou stopping which blood product to use? PT and APTT is normal Fibrinogen low
Cryoprecipitate (has higher fibrinogen than FFP) Higher APTT etc - give FFP