oncology Flashcards
needle core, wedge, and punch biopsies are what time
incisional
T/F
excisional biopsies are pre-treatment
false – post treatment
What type of biopsy should you use if the treatment would be altered by the biopsy results
pre treatment - incisional
T/F
tru cut biopsy can be used on any accessible mass
TRUE
T/F
tru cut will maintain the structural integrity of the tissue
true
what size punch biopsy to procure a diagnostic sample
> 6 mm
do not use punch biopsy for this type of mass
hypodermal – tissue could shift and undetected hemorrhage may occur
preferred biopsy for ulcerated or necrotic tumors
wedge
what is important to remember about doing a wedge biopsy
entire biopsy tract must be removed
use _____ retractors to maintain tissue retraction for deeper lying tumors
gelpi
which biopsy method is the best for a splenic tumor
excisional - remove entire spleen
T/F
after an excisional biopsy, place a passive drain.
FALSE - this will disseminate the cells throughout the entire tract… also eliminate all dead space because seromas are bad
classification system of surgical dosing
enneking system
only real application of intracapsular excision
lipomas or debulking
goes through the pseudocapsule or perilesional zone surrounding the tumor
marginal
marginal lateral marginas for carcinomas
<1 cm
marginal lateral marginas for mast cell tumors
< 2 cm
marginal lateral marginas for soft tissues and bone sarcomes
< 3 cm
marginal lateral marginas for FISS
<5 cm
lateral margins for wide excisions in the enneking system
> 1 - carcinomas
2 - mast cell tumors
3 soft tissues
5 feline iss
enneking system - radical
removal of entire compartment or body part
T/F
when labeling using enneking classifcations, the largest margin used gives the name
FALSE - narrow margin trumps all
general rule for mast cell tumor margins
3 cm lateral and 1 fascial plane deep
modified mast cell tumor proportions technique
widest diameter of the tumor used for the lateral margins for excision and 1 fascial plane deep
complete margins obtained in 82% of cases
benign tumor margins
1 cm lateral and deep
soft tissue sarcoma surgical margins
3 cm lateral and fascial plane deep or 2 muscle planes deep
what dye system and what colors of dye are used for inking surgical margins
davidson dye system
yellow or black
ink all cut surfaces but not the skin
biopsy tissue to formalin ration
1:10
appropriate fixation tissue thickness
0.5 - 1.0 cm
how long can specimen be held at the clinic before they must be submitted to lab
24 hours
R0
R1
R2
R0 - no residual tumor
R1 - microscopic residual tumor
R2 - macroscopic residual tumor
