Introduction to laboratory medicine. Lecture 4. Special chemistry. Definition Special Chemistry is a subsection of the Chemistry Laboratory of the Division of Clinical Pathology. This includes the tests which are not the part of the routine panel. Electrophoresis Urine chemistry
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Special Chemistry is a subsection of the Chemistry Laboratory of the Division of Clinical Pathology. This includes the tests which are not the part of the routine panel.
Normal troponin levels 12 hours after chest pain has started mean a heart attack is unlikely
A substance produced by tumour or by the host in response to tumour from normal tissues.
May be present in blood, urine or tissues.
Mostly they are antigens
May be cytoplasmic proteins, enzymes and hormones.
Be specific to the tumor
Level should change in response to tumor size
An abnormal level should be obtained in the presence of micrometastases
The level should not have large fluctuations that are independent of changes in tumor size
Levels in healthy individuals are at much lower concentrations than those found in cancer patients
Predict recurrences before they are clinically detectable
Test should be cost effective