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Diagnosis
Diagnosis

Cancer Diagnosis

If the cancer screening test results were found to be positive, you will need to undergo a diagnostic test to confirm the presence or absence the disease, or other medical condition.

Diagnosis test are medical procedures:

Biopsy
  • A medical procedure which doctor removes a sample of tissue, of which inspected under a microscope
  • It can be done with a needle, an endoscope or surgery
Laboratory test
  • Lab test to be conducted on blood, urine or other body fluids, in measuring substances
  • It is usually used in combination with other diagnosis procedures
Imaging Procedures
  • A medical procedure used to produce images of areas inside your body. These images are used in indicate the presence of tumour.
  • Examples of imaging procedure are: CT scan, Nuclear scan, ultrasound, MRI, PET scan, X-rays

 

Screening testsDiagnostic tests
PurposeTo detect potential disease indicatorsTo establish presence/absence of disease
Target populationLarge numbers of asymptomatic, but potentially at-risk individualsSymptomatic individuals to establish diagnosis, or asymptomatic individuals with a positive screening test
Test methodSimple, acceptable to patients and staffMaybe invasive, expensive but justifiable as necessary to establish diagnosis
Positive result thresholdGenerally chosen towards high sensitivity not to miss potential diseaseChosen towards high specificity (true negatives). More weight given to accuracy and precision than to patient acceptability
Positive resultEssentially indicates suspicion of disease (often used in combination with other risk factors) that warrants confirmationResult provides a definite diagnosis
CostCheap, benefits should justify the costs since large numbers of people will need to be screened to identify small number of potential casesHigher costs associated with diagnostic test maybe justified to establish diagnosis

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+63-2698 7300 | contact@cancer.org.my

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