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Types of Lymphomas
Hodgkin lymphoma (aka Hodgkin’s disease)
Non-Hodgkin lymphoma
Hodgkin lymphoma (aka Hodgkin’s disease) General
Neoplastic proliferation of an atypical lymphoid cell – Reed-Sternberg cell
Non-Hodgkin lymphoma general
Neoplastic proliferation of B cells, T cells or rarely histiocytic cells (macrophages and dendritic cells)
Lymphomas – general origin and spread
Start in lymph node (typical)
Spread to spleen, liver and bone marrow (other organs in advanced disease)
Hodgkin lymphoma origin (3)
Germinal center B cell →
Transformation and loss of B cell markers →
Reed-Sternberg cell
Non-Hodgkin lymphoma
B cell or T cell → Malignant transformation
Reed-Sternberg cells function
Release many cytokines and chemokines
Reed-Sternberg cells cause (4)
Chronic Inflammatory reaction and tissue fibrosis in the affected lymph node
Eosinophilia
Plasmacytosis and hypergammaglobinemia
Leukocytosis
Hodgkin lymphoma histology (4)
Large cells
Abundant pale cytoplasm
Binucleate with prominent nucleoli (Reed-Sternberg cells)
Surrounding reactive inflammatory cells (Most cells of the tumor)
Hodgkin lymphoma – clinical presentation (2)(2)
Lymphadenopathy
Systemic symptoms
Fatigue, anorexia
Fever, weight loss, night sweats***
Lymphadenopathy development (2)
Starts with enlargement of a single lymph node or group of lymph nodes
Lymph nodes feel rubbery and more firm
Systemic B symptoms (2)
Fever, weight loss, night sweats
from cytokines released from tumor cells or reactive immune cells
Hodgkin lymphoma patient population (2)
Bimodal age distribution
Peak at about 20 years old
Peak at about 65 years old
Non-Hodgkin lymphoma – clinical presentation Varies…
Varies depending on the type of lymphoma and area of involvement
Non-Hodgkin lymphoma – clinical presentation General (2)
Indolent with slowly growing lymphadenopathy waxing and waning over years →
Highly aggressive resulting in death within a few weeks if untreated (Rapidly growing)
Non-Hodgkin lymphoma – Symptoms (2)
Rapidly growing mass
Systemic B symptoms (fever, night sweats, weight loss)