intro to vet diagnostic laboratories Flashcards
1
Q
lesion
A
a pathologic change in a tissue/cell
2
Q
cause/etiology
A
casuative agen
3
Q
pathogenesis
A
sequence of events that lead to or underlie a disease
4
Q
prognosis
A
prediction of outcome of the pathologic process
5
Q
diagnosis
A
a concise statement of the nature, cause of name of a disease
6
Q
what is a biopsy
A
removal and examination of tussue from a live patient
7
Q
why do a biopsy
A
- make or confirm a diagnosis
- rule out other diseases
- determine adequacy of excision
- provide prognostic information
- guide therapeutic decisions
8
Q
the tissue is examined out of context, so interpretation relies:
A
on the clinical data you provide
9
Q
what should a submission form always include
A
- decription of lesion
- location sampled
- number of containers/specimens
- signalment of patient
- history/clinical data pertinent to case
- specific questions to be answered
10
Q
what are the most common types of biopsies
A
- endoscopic (pinch)
- needle core (Tru-Cut)
- punch
- incisional
- excisional
11
Q
what is an endoscopic biopsy
A
- small superficial tissue samples obtained thorugh and endoscope
- usually respiratory, alimentary, or urogenital mucosa
- multiple samples increase likelihood of a diagnosis
12
Q
what is a needle core biopsy
A
- long thin cylinders of tissue often obtained w/ ultrasound guidance
- solid/parenchymatous tissues
- multiple samples
13
Q
what is a punch biopsy
A
- multiple punch sizes available; bigger is better
- avoid using tissue cassettes unless samples are very small
- multiple/larger samples
14
Q
what is incisional biopsy
A
- wedge of tissue removed from a larger lesion or organ
- avoid bloody or necrotic areas
- larger tissue samples
15
Q
excisional biopsy
A
- usually elliptical excision
- surgical margins can be identified & evaluated to determine adequacy of excision
- submission of entire lesion
