2. By the end of this lecture everybody should be
aware about:
Objectives
WHAT IS ALL??
TREATMENT
CLASSIFICATION
EITIOLOGY
DIAGNOSIS
CLINICAL
PRESENTATION
3. It is the malignant tumor of haematopoietic
precursor cells of lymphoid lineage.
Definition:-
4. The most common malignant neoplasms of
childhood ..
Overview:-
5. The most common malignant neoplasms of
childhood are Leukemias.
Which one is the commonest type of
childhood Leukemias?
AML
ALL
CML
JCML
Overview:-
6. The most common malignant neoplasms of
childhood are Leukemias
Which one is the commonest type of
childhood Leukemias?
AML
ALL
CML
JCML
…………….%
…………….%
.……………%
…………….%
Overview:-
7. The most common malignant neoplasms of
childhood are Leukemias
Which one is the commonest type of
childhood Leukemias?
AML
ALL
CML
JCML
…………….%
80%
.……………%
…………….%
Overview:-
8. The most common malignant neoplasms of
childhood are Leukemias
Which one is the commonest type of
childhood Leukemias?
AML
ALL
CML
JCML
10%
80%
2-3%
1-2%
Overview:-
9. Epidemiology
•Approximately 1 in 50,000 (ages 0 to 19 years).
•It has a peak incident rate of 3–7 years old, decreasing in
incidence with increasing age.
•common in males than females.
• There is an increased incidence in people with Down
Syndrome, Fanconi anemia, Ataxia telangiectasia,…etc
10.
11. Etiology
•ALL is associated with exposure to radiation and
chemicals as found by studies of survivors of
atom bomb exposure in Hiroshima and Nagasaki.
• Exposure to benzene and other chemicals .
• Secondary leukemia can develop in individuals
treated for other cancers with radiation and
chemotherapy.
12. Pathophysiology
•The malignant lymphoid precursor cells (ie, lymphoblasts) are
arrested in an early stage of development.
•This arrest is caused by an abnormal expression of genes, often as
a result of chromosomal translocations. The lymphoblasts replace
the normal marrow elements, resulting in a marked decrease in the
production of normal blood cells.
•Consequently, anemia, thrombocytopenia, and neutropenia occur
to varying degrees. The lymphoblasts also proliferate in organs
other than the marrow, particularly the liver, spleen, and lymph
nodes.
15. FAB -classification
L1: show uniform, small blast cells with
scanty cytoplasm.
L2: larger blast cells with more prominent nucleoli
and cytoplasm and with more heterogeneity.
L3: blasts are large with prominent nucleoli,
strongly basophilic cytoplasm and cytoplasmic
vacuoles.
20. World Health Organization
•The recent WHO instead of morphology use of the immunophenotypic
classification mentioned below:
•1. Acute lymphoblastic leukemia/lymphoma. (L1/L2)
• i. Precursor B acute lymphoblastic leukemia/lymphoma.
•ii. Precursor T acute lymphoblastic leukemia/lymphoma
•2. Burkitt's leukemia/lymphoma. (L3)
•3. Biphenotypic acute leukemia.
24. CLINICAL
PRESENTATION
•Bone marrow failure Anaemia (pallor, lethargy and dyspnoea);
neutropenia (fever, malaise, features of mouth ulcer, respiratory,
perianal or other infectionsand thrombombocytopenia
•(spontaneous bruises, purpura, bleeding gums and menorrhagia;
•Organ infiltration Tender bones, lymphadenopathy, moderate
splenomegaly, hepatomegaly and meningeal syndrome (headache,
nausea and vomiting, blurring of vision and diplopia)..
•Less common manifestations include testicular swelling.
25. symptoms
•Bone or joint pain and trouble standing or walking.
•Loss of appetite or continuous weight loss.
•Painless lumps in the stomach, neck, underarm, or groin.
•Lethargy, weakness, paleness, and dizziness.
•Repeated, frequent infections.
•Night sweats or irritability.
•A fever that lasts for several days.
• easy bruising and frequent nosebleeds, bleeding gums.
28. DIAGNOSIS
• Normochromic, Normocytic anaemia with
thrombocytopenia in most cases.
•The TWBCs count may be decreased, normal or
increased to 200 x 109/L or more.
•Blood film examination typically shows a variable
numbers of blast cells(>20% ).
29. Confirmatory tests
Bone marrow aspiration
and biopsy (definitive
for confirming
leukemia)
The bone marrow is
hypercellular with
>20% leukaemic blasts.
39. Prognosis
Sex
Ethnicity
Age at diagnosis
Whether the cancer has spread to the brain or
spinal cord
Initial white blood cell count
Response of patient to initial treatment
Genetic disorders such as Down's Syndrome
ALL subtype
Cytogenetics
Chromosome translocations
