LEUKEMIA Flashcards
malignant neoplasm of the blood-forming tissues of the BM, spleen, and lymphatics
leukemia
old way of classifying leukemia
French-American-British classification
t or f. more blasts will lead to a shorter and more fatal disease
true
what is increased in shift to the left?
more younger forms of WBCs in the PBS
normal M:E ratio in adults
2:1 to 4:1
M:E ratio in leukemic patients
10:1
type of anemia that is commonly present in cases of acute leukemia
normocytic, normochromic
acute vs chronic leukemia (3 each)
acute
- short duration of symptoms
- immature cell forms in BM
- increased total WBC ct
chronic
- long duration of symptoms
- mature cell forms in BM
- low to extremely high WBC ct
new way of classifying leukemia
WHO classification
2 basis in classifying leukemia accdg to FAB:
morphology of cells in Romanowsky-stained smear
based on cytologic and histochemical characteristics
2 cytochemical stains used
myeloperoxidase
sudan black b
romanowsky composition (2)
methylene blue
eosin y/eosin b
romanowsky stain examples
wright’s, giemsa, may-grunwald
MPO and SBB of lymphocytic leukemias
MPO negative
SBB negative
most common form of childhood leukemia
acute lymphocytic leukemia (ALL)
ALL subtypes
L1, L2, L3
which ALL is called Burkitt-type of leukemia
ALL L3
basis of classification for ALL (6)
aic ncc
- age
- immunologic markers
- cell size
- nucleus and nucleolus
- chromatin
- cytoplasm
ALL that has nuclear and cytoplasmic vacuoles
ALL L3
ALL present in 70% of children
ALL L1
ALL present in 70% of adults
ALL L2
rare in children and adult
ALL L3
immunologic marker: CD24
ALL L3
immunologic marker: CD10
ALL L1
immunologic marker: TdT only
ALL L2
cell size: small blasts
ALL L1
cell size: hetero large blasts
ALL L2
cell size: homo large blasts
ALL L3
cytochemistry:
PAS positive
ORO positive
ALL L1 and ALL L2
cytochemistry:
MGP positive
ORO positive
ALL L3
most common type of leukemia in the elderly
chronic lymphocytic leukemia (CLL)
CLL characteristics: (2)
- persistent lymphocytosis
- increased number of smudge and rieder cells
nuclear remnants of the lymphocytes; thumbprint appearance
smudge cells
lymphocytes with notched, lobulated or cloverleaf-like nucleus
rieder cells
clinical variations of CLL (3)
hlp
- hairy cell leukemia
- lymphosarcoma cell leukemia
- prolymphocytic leukemia
lymphocyte with little cytoplasmic projections
hairy cell
stain used to detect hairy cell
TRAP +
tartrate resistant acid phosphatase
MPO and SBB of non-lymphocytic leukemia (myelogenous leukemia)
MPO positive
SBB positive
2 groups of myelogenous leukemia
acute myelogenous leukemia
chronic myelogenous leukemia
AML types:
M0-M7
AML that is negative for both MPO and SBB
M0
AML origin for M0-M3
myelocytic
AML M0 name
AML with minimal differentiation
AML M1 name
AML without maturation
AML M2 name
AML with maturation
AML M3 name
acute promyelocytic leukemia
AML types with auer rods (5)
M1 M2 M3 M4 M6
most common subtype of AML
AML M2
AML associated with DIC and faggot cells
AML M3
generalized overactivation of the coagulation and fibrinolytic system of the body (clot formation and bleeding)
disseminated intravascular coagulation (DIC)
tests to detect DIC (2)
PF 1 + 2 (“prothrombin fragment”)
D-dimer test
related conditions with DIC (TOMASA)
- tissue trauma
- obstetric complications
- mucus-secreting tumors
- acute infections (malaria, G- septicemia)
- snake bites
- acute promyelocytic anemia
WBC with bundles of auer rods
faggot cells
WBC with linear projections of primary granules
auer rods
AML M3 subtype name and characteristics
AML M3V: APL, microgranular variant
butterfly/bowtie/apple core nuclei
AML M4 origin
myelocytic
monocytic
AML M4 name
acute myelomonocytic leukemia (AMML)
naegeli monocytic leukemia
2nd most common subtype of AML
AML M4
AML M4 subtype name and characteristics
AML M4E: AMML with increased marrow eosinophils
AML M5 origin
monocytic
AML M5 name
acute monocytic leukemia (AMoL)
schilling leukemia
AML M5 subtypes name and characteristics (2)
AML M5a: AMoL, poorly differentiated
- seen in children
- > 80% monoblasts in BM
AML M5b: AMoL, well differentiated
- seen in adults
- <80% monoblasts in BM
AML M6 origin
erythrocytic
myelocytic
AML M6 name
acute erythroleukemia
di guglielmo’s syndrome
type of anemia in M6
macrocytic and normochromic anemia
t or f. normal erythroid cells should be positive in PAS?
false
t or f. erythroid cells in AML M6 is positive in PAS
true
AML M7 origin
megakaryocytic
AML M7 name
acute megakaryocytic leukemia
what immunocytochemistry stain is used to diagnose AML M7?
factor VIII stain
AML cytochemical stains used (6)
mss nnf
MPO SBB specific esterase NSE butyrate NSE acetate factor VIII stain
AML cytochemical reaction:
MPO SBB SE = positive
myelocytic origin
M1, M2, M3, M4
M6 - positive or negative
AML cytochemical reaction:
NSE butyrate NSE acetate = positive
monocytic origin
M4, M5
CML name
chronic myelogenous leukemia
chronic granulocytic leukemia
CML characteristic
Ph1
Philadelphia chromosome
how many percent of patients with CML have Ph1 chromosome?
90%
in a normal individual, where are ABL and BCR gene found respectively?
ABL - long arm of chromosome 9
BCR - long arm of chromosome 22
in patients with CML, what happens to his/her chromosome 9 and 22?
long arm of C9 with ABL gene translocates with BCR gene in long arm of C22 therefore producing BCR-ABL fusion gene in long arm of C22/ Philadelphia chromosome
what gene causes CML and where it is found?
BCR-ABL fusion gene in the long arm of chromosome 22
clinical syndrome resembling leukemia
leukemoid reaction
test to distinguish leukemoid reaction vs CML
leukocyte (neutrophil) alkaline phosphatase test
LAP/NAP
LAP/NAP test principle
increased LAP activity can be observed in NORMAL neutrophils
only leukocyte that has alkaline phosphatase activity
neutrophil
method used for LAP/NAP staining
kaplow’s method
normal LAP score
20-100
conditions with increased LAP score (4)
3rd trimester of pregnancy
polycythemia vera
infections
intoxication
all of these are characterized by leukemoid reaction
conditions with decreased LAP score (4)
CML
PNH
sideroblastic anemia
myelodysplastic syndrome