Leukemias and Lymphomas Flashcards
Acute Leukemia Types
1) Acute Myeloid Leukemia 2) Acute Lymphoblastic Leukemia
Symtoms of Acute Leukemia
Anemia (fatigue, pallor) Thrombocytopenia (easy bruising, petechiae) Neutropenia (infection)
What are the rare signs of Acute Leukemia?
Leukostasis, DIC, infiltration of WBCs in skin, gums, lymphs nodes
What is general Blast Marker?
CD34
Risk Factors of Acute Leukemia
Previous Chemo (aklylating agent, Topo II); Tobacco smoke, Radiation, Benzen, Down Syndrom, Bloom, Fanconi Anemia, ataxia-Telang
AML
Acute Myeloid Leukemia - neoplastic accumulation of myeloblasts in BM
ALL
Acute Lymphoblastic Leukemia - neoplastic accumulation of lymphoblasts in BM
Age of Diagnosis: AML vs ALL
AML: 65 YO; ALL:
Diagnosis of AML
> 20% myeloblasts in marrow and/or blood via smear or flow cytometry OR have cytogenetic abnormality
Diagnosis of ALL
Packed marrow with lymphoblasts - no set percentage
Markers for ALL vs AML
Both: CD34; AML: CD117(Ckit) or MPO; ALL: TdT
Remission/prognosis of AML
60% remission; consider HSC transplant for healthy pats with high risk of relapse
Remission/prognosis of ALL
95% remission; cure rate 80% in children; Adults 60-80% remission; 50% cure rate.
what factors decrease prognosis in ALL?
Under 1 or over 10 YO; high WBC, hypodiploidy, slow to respond to treatment
Types of AML
Congenital OR Therapy related
RUNX1-RUNX1T1 Translocation
t(8;21)
RUNX1
alpha subunit in Core Binding Factor is inactive; unable to differentiate homeostasis
RUNX1-RUNX1T1 AML
Mutation in alpha CBF; good prognosis
CBFB-MYH11 mutation
Inv 16 or t(16:16)
CBFB-MYH11 Presentation
Baso-Eos in BM: immature eosinophils with baso granules; mutation in CBF beta - for beta Core Binding Factor; Good prognosis
PML-RARA mutation
t(15:17); also known as APL
APL clinical Presentation
hypergranular with multiple Auer Rods; Retinoid Acid Receptor Alpha protein mutated (unable to differentiate); risk of DIC
APL treatment
All Trans Retioic Acid; not chemo
RBM15-MKL1 mutation
t(1;22)
RBM15-MKL1 Clinical Presentation
Slow megakaryoblastic differentiation; seen in infants with down syndrome; good prognosis
MLL abnormalities with 11q23
poor prognosis
Prognosis of Congenital vs. Therapy AML?
Congenital are usually good (except 11q23) while therapy is very bad prognosis
what therapies cause AML?
Alkylating agents, radiation, topo II inhibitors
What AML has 2-8 year latency?
Alkylating agents or radiation
What karyotype is associated with Alkylating Agent or radiation induced AML?
Complex karyotype with whole or partial loss of Ch5 and 7
what AML has 1-2 year latent period?
Topo II inhibitors
What karyotype is associated with Topo II inhibitor induced AML?
MLL with 11q23
Which therapy related AML has a more progressive path?
Topo II inhibitor induced
FLT3
Internal Tandem Repeat; has an extremely bad prognosis of AML - trumps all other factors
NPM1 mutation
Good prognosis for AML if negative for FLT3
CEBPA mutation
Good prognosis for AML if negative for FLT3
What factors influence prognosis of AML?
FLT-3, NPM1, CEBPA
types of ALL?
B-ALL and T-ALL
prevalence of Congenital vs. Therapy induced AML?
90% Congential
Prevalence of B-ALL vs T-ALL?
B-ALL is 80-85% of ALL cases
what markers distinguish B-ALL from T-ALL?
B-ALL: CD19, CD22, CD79a, lack CD20; T-ALL have CD2, CD3, CD7 (CD2-8)
BCR-ABL mutation
t(9:22); different fusion protein from CML (190 NTs) still on Philadelphia Chromosome
BCR-ABL Clinical Manifesation
Adults; poor prognosis
MLL Mutation
t(11q23)
MLL - clinical manifestation
Common in neonates and infants, poor prognosis
ETV6-RUNX1 mutation
t(12;21)
ETV6-RUNX1 Clinical Manifestation
Mostly in children; very favorable prognosis
T-ALL clinical manifestation
More in males; adolescents and young adults; mediastinal mass; worse prognosis than B-ALL
Myelodysplastic Syndrome
Clonal population from hematopoietic stem cell takes over; failure to make normal cells over one of more lineages
Risks of MDS?
Increased risk of progression to AML
MDS diagnosis
One persistent Cytopenia; Evidence of dysplasia, increased myeloblasts, clonal cytogenetic abnormalities (sideroblast, bilobed nuclei in nuetrophils, hypolobulated small megakaryocytes)
Pseudo-pelger-Huet Cells
bilobed nuclei in neutrophils; characteristic of MDS
What causes MDS?
Primary/idiopathic or Therapy Related
Primary MDS
Usually occurs in late adulthood with insidious onset; cytogenetic abnormalities
Cytogenetic abnormalities in primary MDS
Partial or whole deletion sof Ch5 and 7, Deletion of 5q, trisomy 8
Therapy MDS
due to non-neoplastic causes ( B12/Folate def, virus, toxin, heavy metal) or Neoplastic (chemo drugs or radiation that causes whole or partial deletions of Ch5 and/or 7)
Low Grade MDS basic definition
Myeloblasts are not increased in frequency;
High Grade MDS basic Definition
Myeloblasts increased in frequency; >5% in marrow; and/or >2% in periphery
Types of low grade MDS?
1) refractory cytopenia with unilineage dysplasia (RC_UD) 2) refractory cytosine with multilineage dysplasia (RC-MD) 3) MDS with isolated 5q deletion
RC-UD
Refractory cytopenia with unilineage dysplasia - low grade MDS; good prognosis; survival is >5 years with 2% progressing into AML; usually associated with refractory anemia and not thrombi or neutropenia
RC-UD
Refractory cytopenia with multilineage dysplasia; dysplasia in 2+ lineasge, whose prognosis than RC-UD; survival 2.5 years, 10% progression in AML
MDS with 5q deletion
anemia, increased platelets and marrow with small, round, non-lobulated nuclei in megakaryocytic
Types of high grade MDS
Refractory anemia with excess blasts-1 and 2
RAEB-1 vs. RAEB-2
both high grade MDS; 1: Blasts from 5-9% in BM and 2-4% in periphery 2: 10-19% in BM and 5-19% in periphery; 1 survival is 16 months with 25% transformation to AML; 2: survival 9 months with 33% progression to AML; 2) has small round non-lobulated nuclei
Myeloproliferative neoplasms
Too many (non-dysplastic) cells of one or more lineages
Age of MPS
late adulthood
Common signs of MPS?
high WBC, hypercellular marrow; Hepatosplenomegaly; BM fibrosis, Less able to transform into AML or MDS