Spleen and Thymus I Flashcards
accessory spleen
common finding
embryologic, acquired, rupture
splenectomy look for
accessory spleen
if have one - splenectomy will not work
most common liver disease
cirrhosis from alcohol
HTN arterioles - portal HTN back P to venous system
congested splenomegaly
function of spleen
filter blood
-site of immune responses to blood borne antigens
open circulation spleen
slow flow
-red pulp
cell removal
cords of billroth
removal of RBCs in splenic cords
splenic follicles
sites of B cell maturation
but major site - lymph noes
mononuclear phagocyte system
spleen
liver, spleen, BM, lymphatics
closed circulation spleen
majority of bloodflow
-fast
spleen immune function
dendritic present to T cells
-T and B cells interact edges of white pulp follicles - get Ab secreting plasma cells
splenomegaly
up to 80-90% of platelet mass may be sequestered in red pulp
lead to thrombocytopenia
hypersplenism
large spleen leads to cytopenia
splenic macros
pitting of RBCs
-remove heinz bodies and howell jolly bodies
splenectomy risk
infection from encapsulated bacteria
- pneumococci
- meningococci
- haem influenza
give pneumovax
EMH
can be in spleen