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
most common cause of death splenomegaly
mono-rupture spleen
-health care provider manipulation
non-specific acute splenitis
reaction to blood-borne infection
mild splenomeglay
soft and fluctuant
acute congestion of red pulp
neutro, plasma, eosino infiltrates
mild splenomegaly, soft and fluctuant, acute congestion of red pulp, neutros, plasmas, and eosinos
non-specific acute splenitis
schistosomiasis
parasitic infection
pipe stem hepatic fibrosis
severe congestive splenomegaly
congestive splenomegaly
with cardiac decompensation - right side failure
cirrhosis of liver - alcoholic
obstruction of extrahepatic portal or splenic vein - spontaneous vein thrombosis or compression by tumor
left HF
more common
pyelophlebitis
portal vein inflammation
may lead to congestive splenomegaly
moderate enlargement of spleen
vascular congestion
or obstruction of extrahepatic portal or splenic vein
massive splenic enlargement
with liver cirrhosis
start on
slide 11 of thymus and spleen slides