Haematological Malignancies Flashcards
Classification is based on…
Clinical features, morphology, immunophenotyping and genetic alterations
Cancer of the myeloid stem cell causes…
Acute leukaemia
Cancer of the lymphoid stem cell causes…
Acute leukaemia
Cancer of the plasma cell causes…
Myeloma
Cancers of the B, T, and NK cells cause…
B, T and NK cell lymphomas
Cancers of the RBCs, platelets or granulocytes cause…
Myeloproliferative / myelodysplastic neoplasms
Granulocytes include…
Eosinophils, basophils and neutrophils
Is myeloid neoplasm morphology normal or abnormal?
Either
Myeloid neoplasms are all…
Clonal disorders of haematopoeisis
Morphology of myeloproliferative neoplasms:
Increased mature-appearing cells
Are myeloproliferative neoplasms acute or chronic?
Chronic
Myeloproliferative neoplasms have a variable risk of transformation to…
Acute myeloid leukaemia
Morphology of myelodysplastic syndromes:
Neutrophils usually have 3 lobes
Reduced number of cells and reduced lobes in neutrophils
Are myelodysplastic syndromes acute or chronic?
Chronic
Risk of myelodysplastic syndromes transforming to AML?
30%
Morphology of AML:
Decreased mature peripheral blood cells
Immature cells in the BM and periphery
Decreased RBCs and platelets
Increased white cell count
PV (myeloproliferative, too many RBCs) =
Polycythaemia vera
ET (myeloproliferative, too many platelets)
Essential thrombocytopenia
PM (myeloproliferative, fibrosis in BM)
Primary myelofibrosis
CML (myeloproliferative, 9-22 translocation on the Philadelphia chromosome)
Chronic myeloid leukaemia
Loss of normal BM function in acute leukaemia causes…
Anaemia, fatigue, fever, infection, bruising, bleeding
Infiltration of organs in acute leukaemia causes…
Hepatomegaly, splenomegaly, lymphadenopathy (mediastinal mass in lymphoblastic)
Which type of acute leukaemia develops mediastinal mass?
Lymphoblastic
CNS symptoms in acute leukaemia?
Headache, nausea, nerve palsy
Which acute leukaemia does Auer Rods indicate?
Myeloid
Leukaemia treatment is guided by testing for?
Minimal residual disease
Which medical emergency can be suggested by WCC>100 and lymphoma mass>10cm?
Tumour lysis syndrome
TLS cellular breakdown causes what?
Hyperuricaemia
Three symptoms of TLS are?
Arrhythmia, renal failure, neuromuscular irritability
TLS can be treated with which drugs?
Allopurinol or rasburicase
The translocation of chromosomes 15 and 17 bringing together RARA and PML genes causes which condition?
Acute promyelocytic leukaemia
High PT, high APTT, high D-dimers
Low fibrinogen, low platelets, low TT:
Acute promyelocytic leukaemia
Cure for acute promyelocytic leukaemia?
ATRA and arsenic
What are lymphoid neoplasms?
Clonal tumours of B, T or NK cells
Where does the B cell neoplasia responsible for B lymphoblastic leukaemia / lymphoma occur?
Bone Marrow
Where does the B cell neoplasia responsible for Mantle cell lymphoma occur?
Interfollicular area
Where does the B cell neoplasia responsible for follicular lymphoma occur?
Follicular area
Where does the B cell neoplasia responsible for Burkitt lymphoma occur?
Follicular area
Where does the B cell neoplasia responsible for Hodgkin’s lymphoma occur?
Follicular area
Where does the B cell neoplasia responsible for MALT lymphoma occur?
Perifollicular area
Where does the B cell neoplasia responsible for plasmacytoma occur?
Perifollicular area
Where does the T cell neoplasia responsible for T lymphoblastic lymphoma / leukaemia occur?
Thymus and BM
Where does the T cell neoplasia responsible for peripheral (mature) T cell + NK cell lymphomas / leukaemia occur?
Spleen, mucosa, peripheral blood, skin, organ specific, follicle
Which haematological malignancy can be detected through clonal abnormal Ab secretion?
Plasma cell myeloma
15-20% of plasma cell myelomas are…
Light chain
Prognosis of plasma cell myelomas is based on what?
Genetics, albumin and beta-2 microglobulin
Hypercalcaemia, renal failure, lytic lesions, anaemia, recurrent infections and amyloid plaques are symptoms of which haematological malignancy?
Plasma cell myeloma
How do you diagnose plasma cell myeloma?
Paraprotein and serum free light chains