Cytopathology Flashcards
Based on spontaneous shedding of cells derived from the
lining of an organ into a cavity
Exfoliative Cytology
It is the simplest of the three sampling techniques
Exfoliative Cytology
Examples of Exfoliative cytology
Vaginal smear, sputum, urine, effusion
The material is collected spontaneously or by a syringe or a
cotton swab.
Exfoliative Cytology
Cells are obtained directly from the surface of the target of
interest.
Abrasive Cytology
Samples are taken by:
scraping; from cervix (pap smear), vagina, oral cavity (Buccal
mucosal smear), and skin lesions
Abrasive Cytology
Samples are taken by:
brushing, washing, and lavage: bronchi, GIT, and urinary tract
Abrasive Cytology
Examples: cervical scraper, endoscopy, and gastric lavage.
Abrasive Cytology
Samples can be obtained from superficial or deep lesions
Abrasive Cytology
The purpose of this procedure is to dislodge cells, enrich
the sample with cells obtained directly from the surface of
the target of interest.
Abrasive Cytology
Samples are obtained from solid tissue: body organs,
tumors & other swell
Fine Needle Aspiration Cytology
(FNAC)
Example of FNAC
lymph node, breast and thyroid
A needle with a syringe is used.
FNAC
Virtually every organ in the body is accessible to this
method
FNAC
Fixatives for Pap smear & FNA
95% ethyl alcohol
Fixatives does not result in lysis of RBC & better reserved of nuclear details
Fixatives
Fixatives for lysis of RBC
Carnoy’s fixative
Stain Mainly used in Exfoliative cytopathology.
Papanicolaou stain
Stain that is Good & better demonstration of nuclear details.
Papanicolaou stain
Stains Mainly used in FNA
Hematoxylin & Eosin (H&E)
Stains Mainly in FNA
Leishman & Giemsa stains
Air–dried Giemsa staining or Wet–fixed Pap’s staining:
Air drying
Air–dried Giemsa staining