HISTOPATH Flashcards
Specimen Retention
1 month to 1 year
Retention of Tissue Block
3 years to 10 years
Retention of:
Slides
Records
Result Forms
Indefinite
Permanent
Triplicate
FISCAM
Forensic Pathology
Immunohistopathology
Surgical Pathology
Cytology
Autopsy
Molecular Biopsy
Thickness:
Whole mount
Sectioning
0.2 - 0.5mm
3.0 - 5.0mm
Microscopic exam of cells from different body sites
Diagnostic Cytology
Microscopic exam of cells that have been desquamated from epithelial surfaces
Exfoliative cytology
Histotechniques?
FDCIETSSML
Fixation, (Decalcification), Dehydration, Clearing, Impregnation, Embedding, Trimming, Section-Cutting, Staining, Mounting, Labelling
Also referred to as “Dissection”/”Separation”; Disadvantage: anatomical relationship is destroyed
TEASING/DISSOCIATION
FACTORS AFFECTING FIXATION/PRESERVATION
- Size and nature/type of tissue
- Volume of tissue: 1:20x volume of tissue
- pH: 6-8
- Temperature: Room Temperature (20-22OC)
- Osmolality: slightly hypertonic solution
fixative for fats, mucin, glycogen
FORMALDEHYDE
most widely used for Electron Microscopy; Best fixative for enzyme histochemistry
GLUTARALDEHYDE
fixative for acid mucopolysaccharide; connective tissue
LEAD FIXATIVE
fixative for mucopolysaccharide; nuclear proteins
NEWCOMER’S FLUID
fixative for connective tissue, liver, spleen, nuclei; Trichome Staining; Made up of mercuric chloride stock solution in which glacial acetic is added before use
ZENKER’S FLUID
MOST RAPID FIXATIVE
CARNOY’S FLUID
MOST COMMON FIXATIVE
MERCURIC CHLORIDE
Fixative for Hemosiderin; Better and Rapid compared to Orth’s; “Moller’s Fluid”
Regaud’s Fluid
early degenerative processes and tissue necrosis; demonstrate Rickettsiae spp.
ORTH’S FLUID
fixative for tumor biopsies of the skin
HEIDENHAIN’S SUSA FLUID