Malignancy Flashcards
(63 cards)
1
Q
What protein is expressed by haematopoetic stem cells on immunohistochemistry?
A
- CD34
2
Q
Define acute leukaemia?
A
- proliferation of abnormal progenitors with block in differentiation/maturation
3
Q
Define chronic myeloproliferative disorders?
A
- proliferation of abnormal progenitors but no differentiation/maturation block
4
Q
What are driver mutations?
A
- clone cells selected
- normal haemopoeis = polyclonal
- malignant haemopoesis = monoclonal
5
Q
Describe passenger mutations
A
- do not confer a growth advantage
- happen to be present
6
Q
Haematological malignancy types based on lineage
A
- myeloid
- lymphoid
7
Q
Haematological malignancy types based on developmental stage
A
- primitive (acute lymphoblastic, chronic myeloid)
- mature (chronic lymphoblastic, myeloma, acute myeloid)
8
Q
Leukaemia means?
A
- malignancy of blood
9
Q
Lymphoma means
A
- malignancy of lymph nodes
10
Q
Myeloma means?
A
- malignancy of plasma cells
11
Q
Types of acute leukaemia?
A
- acute myeloid leukaemia
- acute lymphoblastic leukaemia
12
Q
What is acute leukaemia?
A
- rapidly progressive
- malignancy of clonal cells
- defects in marrow / blood maturation
13
Q
Which is the commonest leukaemia in children
A
- acute lymphoblastic anaemia
14
Q
How might ALL present?
A
- anaemia
- bleeding
- bone pain
- infection
- CNS involvement
15
Q
How might AML present?
A
- Older patient
- secondary or de novo
- aneamia
- infection
- gum infiltration
16
Q
Name a complication of AML?
A
- Disseminated intravascular coagulation
17
Q
Auer rods suggest?
A
- acute myeloid leukaemia
18
Q
What is a test to confirm between ALL and AML?
A
- Immunophenotyping
19
Q
What are immunoglobulins?
A
- produced by b-cells and plasma cells
20
Q
What is the structure of immunoglobulins?
A
- 2 heavy
- 2 light
21
Q
Where can immunoglobulins be found?
A
- on the B cell surface
- in blood (released by plasma cells)
22
Q
Name some monomer immunoglobulins?
A
- IgD
- IgE
- IgG
23
Q
Name dimer immunoglobulins?
A
- IgA
24
Q
Name a pentamer immunoglobulin?
A
- IgM
25
What forms the variable region of an immunoglobulin?
- V D J
26
What is the name given to the cell when a B cell travels back to the bone marrow
- plasma cell
27
What are plasma cells
- factory cell
| - produce a large amount of antibodies
28
How are plasma cells recognised under the microscope?
- blue cytoplasm
| - pale perinuclear areas (Golgi apparatus)
29
Polyclonal increase in immunoglobulins may be a result of what?
- infection
- autoimmune
- malignancy
- liver disease
30
Monoclonal rise in immunoglobulins may be suggestive of?
- marker of underlying disorder
| - called paraproteins
31
How are immunoglobulins detected?
- serum electrophoresis
| - quantifies by serum immunofixation
32
What are bence jones proteins?
- usual light chain immunoglobulin precipitates
| - detected in the urine electropheresis
33
What conditions are paraproteins seen in?
- MGUS
- Myeloma
- Amyloidosis
- Lymphoma
34
What are paraproteins
Monoclonal immunoglobulins
35
What is myeloma?
- plasma cell malignancy
36
How does myeloma affect the body?
- direct tumour cell effect
- bone lesions
- increased calcium
- bone pain
- marrow failure
- paraprotein mediated
- renal failure
- immune suppression
- hyperviscosity
- amyloid
37
What is the commonest myeloma?
- IgG
38
How is myeloma classified?
- by immunoglobulin
- IgG is most common
- IgA
- Bence jones
39
Symptoms of hypercalcaemia?
- stones
- bones
- abdominal groans
- psychiatric moans
- kidney impairmetn
40
How is cast nephropathy treated?
- hydration
- steroids
- chemo
41
Treatment of myeloma?
- chemotherapy
- dexamethasone
- cyclophosphamide
- monoclonal antibodies
- opiates
- radiotherapy
- bishopshonates
42
What does MGUS stand for?
- monoclonal gammopathy of underdetermined significance
43
How is MGUS diagnosed?
- paraprotein <30g/l
- plasma cells <10%
- no myeloma end organ damage
44
What causes the symptoms of AL amyloidosis?
- misfold of amyloid protein to form an insoluble beta pleated sheet
- accumulation in multi organ systems
45
How is AL amyloidosis diagnosed?
- Organ biopsy with Congo red stain
| - SAP scan
46
Waldenstrom's macroglobulinaemia symptoms?
- IgM paraprotein leads to hyperviscosity symptoms
47
Treatment of waldenstroms macrotgloblinaemia?
- plasmapheresis
| - chemotherapy
48
Define remission?
- no detectable cancer cells
| - may relapse
49
Cytotoxic drugs can either be ___ or ___
- cell cycle specific
| - non-cell cycle specific
50
Name examples of cell cycle specific drugs?
- antimetabolites (methotrexate)
| - mitotic spindle inhibitors
51
Name non-cell cycle specific drugs?
- alkylating agents
- platinum derivatives
- cytotoxic antibiotics
52
Immediate cytotoxic drug effects?
- bone marrow suppression
- gut mucosal damage
- alopecia
53
Vina alkaloids may cause?
- neuropathy
54
Anthracyclines may cause
- cardiotoxicity
55
Cis-platinum may cause?
- nephrotoxicity
56
Long term side effects of chemotherapy
- infertility
- secondary malignancy
- cardiomyopathy (anthracyclines)
57
What may be a reason why chemotherapy fails to work?
- tumour slow turn over
| - drug resistant mechanisms
58
What limits intensifying chemotherapy?
- limited by myelosuppression
59
What may be used to overcome myelosuppression in chemotherapy?
- haematopoietic growth factors (G-CSF)
- Monoclonal antibodies
- bone marrow transplantation
60
Name an example monoclonal antibody that may be used in combination with chemotherapy?
- rituximab
| - targets malignant protein
61
What could be a target treatment in myeloma?
- biological agent
| - proteasome inhibitor
62
What is a good treatment option in CML and how does it work?
- tyrosine kinase inhibitor
- targets specific to cancer cell
- molecularly targeted
63
3 types of immune therapy
- bone marrow transplant
- T cells from donor
- adoptive immunotherapy (using patients own cells to mark cancer as foreign)
