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Cytology of Body
Fluid
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Schematic representation of the three body cavities
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Accumulation of fluids in body cavities
Transudates
Increased hydrostatic pressure: Congestive heart
failure
Decreased oncotic pressure(decreased albumin) :
liver cirrhosis, nephrosis, and malnutrition
Exudate
Inflammation: Infection, infarction, hemorrhage
Tumor
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differences between transudate and exudate
Feature Transudate Exudate
Gross appearance Watery, clear Turbid or cloudy
Specific gravity Less than 1015 More than 1015
Protein Less than 3mg/dl More than 3mg/dl
Clots No Yes
cells Usually benign:
Few mesothelial
cells, few histocytes
and lymphocytes
More mesothelial cells,
acute or chronic
inflammatory cells,
RBCs, malignant cells
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Diagnostic role of effusion cytology
It is very useful for diagnosis of premalignant and
malignant tumors, especially metastatic tumors.
It is very useful for diagnosis of inflammatory
conditions (septic effusion, or chronic specific
inflammation e.g. TB
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Respiratory Tract
Urinary Tract
Oral Cavity
Gastrointestinal Tract
Effusions (pleural, pericardial, joint)
Cerebral Spinal Fluid
Amniotic fluid
Many other body sites
Non-Gynecological Specimen Collection
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Examination of body fluid
Gross exam
Total cell count
Microscopic exam
Any other special test (Chemistry, Microbiology,
cytology(
Test are performed in various areas of lab based on what
the physician orders.
Body fluids sterile vs. non-sterile
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Sample collection
FNA of effusion fluids
Tapping
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Collection and preparation of specimen
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Fixation
1ml of heparin + 100ml of effusion fluid to prevent
clotting
N.B.: do not use alcohol in fixation of fluid before
spread cytological smear on glass slides
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Types of staining smears
PAP
Gram Stain
Hx & E
Cell block for remnant sediment and
histopathological examination.
Other special stains for the most suspected diseases,
to confirm diagnosis.
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Heparinized
bottles (3 units
heparin/ml)
Unfixed
Alcohol-fixed
Papanicolaou-stained
Cytocentrifuge preparationCell block
Adding plasma and thrombin
solution
Wrapped in filter paper
Placed in a cassette
Embedded in paraffin
Cut and H&E stain
Air-dried cytocentrifuge preparation
(Hematologic malignancy is
suspected)
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1- Cerebrospinal Fluid
Fluid surrounding brain and spinal cord
Sterile
Specimen collection: by Lumbar puncture
Collect 3-5 vials, each tube has a designated department.
Gross exam: Turbidity, Color, microscopic exam, cell
count
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CSF cell differential
Numerateand differentiatecells seen
Lymphocytes: usually are few; increased with viral,
fungal, bacterial meningitis, or nervous system disease
Monocytes: Less than 2% of normal CSF, increased
with TB meningitis, viral encephalitis, subarachnoid
hemorrhage.
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PMN: are few, associated with Viral and acute
bacterial inflammation.
Macrophages: arefew in number associated
with malignancy, hemorrhage, inflammation
Eosinophils/Basophils: not normally seen in CSF
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Plasma cells: not normally present; associated
with viral disorders, and Hodgkin's diseases.
Red Blood Cells: Few to none present
Mesothelial cells: not present
Malignant cells: will see with malignant disease
and infiltrate.
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Effusion:
Transudate
Exudates
Lab analysis: Gross exam, cell count, etc.
Differential: PMN, Lymph, Mono, etc.
2- Pleural Fluid: Lung fluid
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Cells unique to the lungs: Mesothelial cells
RBCs and WBCs: are limited, if increased without
traumatic tap ----- indicates infarction
Cytology exam: useful in identifying malignancy or
abnormal morphological cells.
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3- Peritoneal Fluid
Abnormal accumulation of fluid (effusion) in peritoneal
cavity: Ascites
Ascites: a condition in which fluid accumulates within
the peritoneal space.
Must have an accumulation of > 100ml (several 100)before effusion can be detected on physical exam.
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Removal procedure- paracentesis
Lab analysis: distinguish between transudate
and exudates, gross exam, cell count,
sedimentation, chemical analysis
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Physical Characteristics
Peritoneal Fluid Appearance: Color and clarity.
Color and clarity can indicate certain infections
and diseases.
Total Cell Count: Assist in diagnosis of certain
diseases by determining total RBC and WBC number.
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Lymphocytes: CHF, liver cirrhosis, nephrotic syndrome
Mesothelial Cells: Associated with TB effusions
Malignant cells: seen with malignancy
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Pericardial Fluid: accumulation of fluid of the lining of
the heart (effusion)
Cause: neoplasm, infections, collagen disease, renal
disease, Cardiovascular disease.
Gross Exam: Report appearance (bloody, clear, cloudy)
4- Pericardial Fluid
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Measure pH:pH less than 7.0 associated with
infection or rheumatoid disorder.
Cell count: see limited RBCs and WBCs
Evaluate sedimentation
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Examine physical, chemical and microscopic detail
Count number of sperm, report morphology and
motility
Specimen must be a fresh collection-clean, sterile
container.
Gross Exam: Color, pH, Volume, and viscosity.
Agglutination study
5- Seminal Fluid
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Joint Fluid: normally clear, viscous
Functionsas a lubricate and transports nutrient
Arthrocentesis: aspirate of the joint fluid, aseptic
technique
Lab Assay: Gross exam, microscopic exam, Gram
stain, cultures,...
6- Synovial Fluid:
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Appearance: clear, transparent, viscous
Viscosity test
Mucin Clot test
Note crystals (intracellular vs. extra cellular)
Slide exam: usually performed on concentration of
the fluid using Giemsa or Papnicolaou