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
run long distance with LUQ pain
blood sequestered to spleen
dragging sensation in LUQ and discomfort after eating
splenomegaly
anemia, leukopenia, thrombocytopenia
seen in hypersplenism
salmonella
typhoid
colon carcinoma
liver mets
-spleen spared**
spleen is rarely site of metastatic foci
shaggy exudates
nonspecific splenitis of various blood borne infecdtions
EBV
mononucleosis
amyloidosis
primary inflammatory disease
-can lead to splenomeglay
splenic rupture
more common with mono, malaria, typhoid, lymph neoplasms
less common with chronic conditions