Lymphatic vessels absorb excess
interstitial fluid and transport this fluid
(LYMPH) to ducts that drain it to the veins
Lymph nodes and lymphoid tissues in the thymus, spleen,
and tonsils produce lymphocytes involved in immunity
Lymph
node
histology
Types
Hodgkin's
Non-Hodgkin's
Burkitt lymphoma
t(8;14)—translocation, “Starry sky” appearance, sheets of lymphocytes
with interspersed “tingible body” macrophages, associated with EBV. Jaw
lesion in endemic form in Africa; pelvis or abdomen in sporadic form.
Diffuse large B-cell lymphoma
Alterations in Bcl-2,
Bcl-6, Most common
type of non-Hodgkin
lymphoma in adults.
Follicular lymphoma
t(14;18)—translocation,
Indolent course; Bcl-2
inhibits apoptosis. Presents
with painless “waxing and
waning” lymphadenopathy.
Mantle cell lymphoma
t(11;14)—translocation,
Very aggressive,
patients typically
present with
late-stage disease.