Category
SPECIAL CHEMISTRY.
Sub Category
TUMOR MARKER.
Synonyms/Aliases
5-HYDROXYTRYPTAMINE, SERUM.
Abbreviations
5-HT.
Type
INDIVIDUAL TEST.
10 DAYS
RESULTS READY/ REPORTED IN 10 WORKING DAYS.
Method
CHROMATOGRAPHY.
Temp
FROZEN (PREFERRED) OR REFRIGERATED.
Setup
BATCHED.
Components Parameters
NOT APPLICABLE.
PRE-ANALYTIC CONSIDERATIONS
Test Ordering Instructions
FILL OUT TEST REQUEST FORM FULLY & LEGIBLY. PROVIDE CLINICAL HISTORY & PATIENT'S CURRENT DRUG HISTORY (MULTIPLE DRUGS CAN INCREASE OR DECREASE 5-SEROTONIN LEVELS; CONSULT PATHOLOGIST IF IN DOUBT). DISCONTINUE SELECTIVE SEROTONIN REUPTAKE INHIBITORS (SSRIs).
Patient preparation
DO NOT CONSUME FOODS RICH IN SEROTONIN (E.G. AVOCADOS, BANANAS, PINEAPPLE, MELONS, TOMATOES, EGGPLANTS, NUTS ETC.) FOR 48-72 HOURS PRIOR TO SAMPLE COLLECTION. AVOID STRENUOUS EXERCISE.
Sample type
SERUM.
Container/ preservative
SERUM SEPARATOR TUBE (SST/ GEL) OR PLAIN (RED TOP) VACUTAINER.
Sample volume
AT LEAST 2ML.
Rejection criteria
LABELING ISSUE (UNLABELED/ MISLABELED); MISSING REQUEST FORM; MISMATCH BETWEEN REQUEST FORM & SAMPLE DETAILS; MISSING AGE/ GENDER; WRONG SAMPLE TYPE; INSUFFICIENT SAMPLE.
Other Instructions
CENTRIFUGE SST (SERUM GEL TUBES) WITHIN 1-2 HOURS OF COLLECTION. CENTRIFUGE RED TOP VACUTAINERS AND ALIQUOT SERUM WITHIN 1-2 HOURS OF COLLECTION. THE SEPARATION VIAL MUST BE LABELED WITH AT LEAST 2 PATIENT IDENTIFIERS AND THE SAMPLE TYPE.
Reference intervals
AGE & GENDER APPROPRIATE VALUES ARE PROVIDED ON THE REPORT.
Clinical Utility
DIAGNOSIS & MONITORING OF NEUROENDOCRINE TUMORS/ CARCINOID TUMORS.
Test Limitations/ Confounders
DIETARY & DRUG RESTRICTIONS APPLY. RESULTS SHOULD ALWAYS BE CORRELATED WITH CLINICAL FINDINGS & RESULTS OF OTHER DIAGNOSTIC WORK-UP E.G. IMAGING, TISSUE BIOPSY FINDINGS.