EBUS-TBNA Flashcards
Lymph node stations that are reachable by EUS
5, 6, 8, 9
Accuracy of EBUS in Radiologic N0 patients
36%
Why is lymph node restaging after chemo less effective
Lymph node undergoes necrosis and fribrosis following chemo
Sensitivity of EBUS for lymphoma initial diagnosis
57%
Sensitivity of EBUS for recurrent lymphoma diagnosis
88%
Protocol for biopsy when trying to diagnose sarcoidosis
EBUS first, then if negative, do TBB
Combined procedure more sensitive than either alone
6 structures to ID on Jenssen EUS protocol
Liver
Abdominal Aorta
Left adrenal gland
Station 7
Station 4L
Station 4R
Minimum amount of passes on EBUS for tissue diagnosis
3
Minimum amount of passes on EBUS for IHC sufficiency
4
average 6
Size that suggests benign lymph node
< 5 mm
Shape that suggests benign lymph node
oval
Margins that suggest benign lymph node
indistinct
Echogenicity that suggests benign lymph node
homogenous
Structure in a lymph node that suggests benign
central hilar structure
Sign that suggests benign lymph node if found
No central necrosis sign
Only 2 lymph node appearance characteristics validated to suggest malignancy
Absence of central hilar structure and heterogeneous echogenicity
Score for characterizing malignancy risk in lymph nodes
Canada Lymph Node Score
4 Components of Canada Lymph Node Score
Distinct Margins
Absence of central hilar structure
Central necrosis present
> 10 mm small axis diameter
Odds ratio of malignancy with Canada Lymph Node Score of 3
15
Odds ratio of malignancy with Canada Lymph Node Score of 4
50
Sensitivity of elastography on lymph node malignancy
88%
Specificity of elastography on lymph node malignancy
85%
Should elastography be used in place of tissue sampling?
No
is there a difference in diagnostic yield with varying needle sizes in EBUS?
No
