Lymphoma Flashcards
What does the submandibular lymph node drain?
The face
What does the preauricular lymph node drain?
Scalp & skin
What does the epitrochlear lymph node drain?
Ulnar foreman & hands
What antigens prove that reed-stenberg cells originated from b-lymphocytes?
PAX5 & MUM1
How can identification of hodgkin cells help us ?
They help identify extra-nodal sites in known cases
When is hodgkin lymphoma considered stage 1?
1 nodal / extra-nodal region
When is hodgkin lymphoma considered stage 2?
2 nodal regions on the same side of the diaphragm
When is hodgkin lymphoma considered stage 3?
Nodal regions on both sides of diaphragm + spleen maybe
When is hodgkin lymphoma considered stage 4?
Diffuse extralymphatic disease
% of SLL in NHL?
4%
What is the transformation of SLL into DLCL called?
Richter’s transformation
% of Folicular lymphoma patients from all NHL?
40%
What mutation causes most of follicular lymphomas?
BCL2 on chr. 18 translocating into chr. 14 (Heavy Ig)
t [14:18]
What identifies grade 1 follicular lymphoma ?
0-5 centroblasts
What identifies grade 2 follicular lymphoma ?
6-15 centroblasts
What identifies grade 3 follicular lymphoma ?
> 15 centroblasts
% of mantle cell lymphoma patients out of all NHL patients?
5%
What mutation causes mantle cell lymphomas?
Cyclin D1 on chr. 11 translocates to chr. 14 (Heavy Ig)
t [11;14]
% of DLCL out of all NHL patients?
20%
What mutations causes diffuse large cell lymphomas?
30% by BCL6 point mutation
30% by BCL2 over-expression
What mutation causes burkitt lymphoma?
Translocation of c-myc on chr. 8 to chr. 14 (heavy Ig)
t [8;14]
What causes B-symptoms ?
Reactive cells
CD markers of classical Hodgkin lymphoma
CD15 & CD30
What is the RS cell type found in Nodular sclerosing Hodgkin lymphoma ?
Lacunar cells
What is the reactive cell type found in Nodular sclerosing Hodgkin lymphoma ?
Fibroblasts
What is the RS cell type found in Nodular lymphocyte predominant Hodgkin lymphoma ?
Popcorn cell (PL)
Symptoms of Hodgkin lymphoma?
Painless lymphadenopathy & B-symptoms
What type of lymphocytes is reactive in hodgkin lymphoma?
T- helper cells