Diagnostics 4 - Histopathology and Cytopathology lab Flashcards Preview

Year 2 Collin > Diagnostics 4 - Histopathology and Cytopathology lab > Flashcards

Flashcards in Diagnostics 4 - Histopathology and Cytopathology lab Deck (6)
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1
Q

Differentiate histopathologists and cytopathologists

A

Histopathologists (tissue structure) - Biopsies, resection specimens, frozen sections, post mortems

Cytopathologists = smears and fine needle aspirates

2
Q

What are frozen sections fixed in?

A

Formalin - crosslinks proteins and slows decomposition

Then embedded in paraffin wax

3
Q

What stain is used for frozen sections

A

H + E (haematoxylin and eosin), ZN stain (for TB)

4
Q

When is cytopathology used?

Cytopathology is very quick

A

When looking at individual cells and not tissues

used for fine needle aspirations

used for cervical screening

5
Q

Which disease is the HIV/AIDS defining diease

A

Kaposis sarcoma - may be shown on a skin biopsy

6
Q

CD31 immunocytochemistry may show?

A

Vascular tumour infiltrating collagen bundles - endothelial cell tumour

CD31 marks vascular endothelium

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