Ch21 The Lymphomas Flashcards
What is the probable infectious agent of HL?
EBV
What are the 2 major categories of malignant lymphoma?
Hodgkin disease
Lymphocytic lymphoma
EBV nucleic acids can be demonstrated in the lesions of approx ____ of cases of HL
80%
What is the cytology as hallmark of HL?
The presence of an unusual giant cell, the Reed-Sternberg cell
Name characteristics of the Reed-Sternberg cell?
45um in diameter Abundant eosinophil cytoplasm Multinucleated or polylobated nucleus Gigantic inclusion-like nucleus Clearing of the chromatin
What are the clinical features of HL?
Complaint of non-painful lymph node swelling
The diagnosis of HL requires:
Tissue biopsy and microscopic evaluation
How is staging evaluation of HL determined?
By the number of lymph nodes involved and which lymph nodes are involved
What is the survival rate of stages I and II of HL?
80% exceed 10 years
What is used to show nonrandom chromosome abnormalities in about 60% of non-HL?
Karyotyping
What are the types of NHL?
B-cell and T-cell NHL
What is the most common type of NHL?
B-cell 85-90%
Give an example of a B-cell NHL
Burkitt lymphoma - uncool led proliferation
Where is Burkitts lymphoma predominantly an endemic?
Africa
Describe the cell morphology seen in Burkitts lymphoma
Lipid vacuoles in cytoplasm
Medium sized lymphocytes
High frequency of tumor cell incorporated EBV genomes
Facial bone involvement