Quiz 5 Flashcards
Cancer of myeloblasts, fill marrow, “pre-leukemia”
myelodysplastic syndromes
pg 121
Features of myelodyplastic syndromes
hypercellular marrow, megaloblasts, irregular ratios(RBCs, granulocytes, platelets), >1 cytopenia
pg 121/122
~40% of myelodysplastic syndromes turn into…
AML
pg 121
Population affected by myelodysplastic syndromes
older adults (50-70) pg 121
Risks for myelodysplastic syndromes
history of chemotherapy or irradiation, monosomy and trisomy
pg 122
Prognosis of myelodysplastic syndromes
poor, median survival(1-2years)
pg 122
Group of indolent tumors
chronic myeloproliferative disorders
pg 123
Categories of chronic myeloproliferative disorders
1) chronic myelogenous leukemia
2) polycythemia vera
3) primary myelofibrosis
pg 123
20% of all leukemia cases, leukocytosis >100,000cell/microL
chronic myelogenous leukemia
pg 124
Population of those affect by chronic myelogenous leukemia
25-60 years
pg 124
Features of chronic myelogenous leukemia
fatigue, weakness, cachexia, extreme splenomegaly, “red pulp” spleen, Philadelphia chromosome (t(9;22))
pg 124/125
What % of cases of chronic myelogenous leukemia enter an accelerated phase?
50%
pg 125
Treatment of chronic myelogenous leukemia
marrow transplant (70% curative), tyrosine kinase inhibitors pg 125
Increased concentration of RBCs
Polycythemia
pg 128
Relative polycythemia
decrease of plasma (fluid)
pg 128
Absolute polycythemia
increase total RBC mass
pg 128
Cause of primary absolute polycythemia
cancerous growth of myeloid stem cells
pg 128
cause of secondary absolute polycythemia
after increase EPO
pg 128
Too many RBCs, WBCs, and platelets
panmyelosis
pg 129
Features of polycythemia vera
itching, hepatosplenomegaly, dysfunctional platelets, blood is viscous, JAK2 point mutations
pg 131
MC population with polycythemia vera
older adults (MC 60) pg 131
Treatment for polycythemia vera
marrow transplant, chemotherapy
pg 131
Cancer of myeloblasts causing diffuse marrow fibrosis
primary myelofibrosis
pg 132
Features of primary myelofibrosis
extramedullary hematopoiesis, disordered/inefficient hematopoiesis
pg 132
MC population effected by primary myelofibrosis
elderly (MC 65)
pg 132
What microscopic red blood cell feature is common in primary myelofibrosis?
dacrocytes
pg 132/133
Histiocytes
macrophages or dendritic cells
pg 136
Birbeck granules
“tennis racket” organelle
pg 136
How common are histiocytic neoplasms?
rare ~1,000 cases a year in the US
pg 136
2 categories of histiocytic neoplasms
1) unisystem Langerhans cells histiocytosis
2) multisystem Langerhans cell histiocytosis
pg 136
Population most affected by unisystem Langerhans cell histocytosis
children and adolescents
pg 137
Osseous involvement of unisystem Langerhans cell histocytosis effects which bones?
calvaria, ribs, femur
pg 137
Population affected by multisystem Langerhans cell histiocytosis
young children <2yrs
pg 138
Features of multisystem Langerhans cell histiocytosis
multifocal skin lesions and fever, hepatosplenomegaly and lymphadenopathy(may invade lungs and bone)
pg 138
Bleeding disorders
1) disseminated intravascular coagulation
2) immune thrombocytopenia purpura
3) von Willebrand disease
4) hemophilia A
5) hemophilia B
pg 140
Systemic coagulation causing widespread thrombi
Disseminated Intravascular Coagulation (DIC)
pg 141
Features of Disseminated Intravascular Coagulation (DIC)
widespread thrombi, may deplete platelets and clotting factors
pg 141
Acute DIC
obstetric complications, crush injuries
pg 142
Chronic DIC
thrombi, widespread CA mets
pg 142
Decreased platelets leading to bleeding tendency
thrombocytopenia
pg 143
Antibodies (IgG) attack platelets
immune thrombocytopenic purpura
pg 145
Features of Acute ITP
children, self-limited, secondary to viral infection
pg 145