Abnormal Csf 5 Hydroxyindoleacetic Acid Concentration C6055304
An unusual level of a brain chemical called 5-HIAA measured in spinal fluid. Used to assess neurological conditions. Results guide further medical evaluation.
Key facts at a glance
- ICD-10
- G31.82
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizure
Sudden uncontrolled electrical disturbance in the brain causing convulsions or loss of consciousness.
Seek immediate emergency care if experiencing a seizure for the first time or if seizure lasts more than 5 minutes.
Difficulty breathing
Shortness of breath, wheezing, or feeling of breathlessness that may come on suddenly.
Seek immediate medical attention if experiencing sudden or severe difficulty breathing.
Headache
(neurologic)Persistent or recurrent headache often described as pressure-like or throbbing in nature.
Frequency: 70-80% of patients
Cognitive changes
(neurologic)Difficulty concentrating, brain fog, or mild memory impairment affecting daily activities.
Frequency: 50-60% of patients
Nausea
(gastrointestinal)Feeling of sickness in the stomach with urge to vomit, often occurring in the morning.
Frequency: 45-55% of patients
Heart rate changes
(cardiovascular)Abnormal heart rhythm or tachycardia, sometimes accompanied by palpitations.
Frequency: 20-30% of patients
Skin flushing
(dermatologic)Sudden reddening of the face, neck, or upper chest, often episodic and temporary.
Frequency: 15-25% of patients
Tremor
(neurologic)Involuntary shaking or trembling, typically affecting hands and fingers.
Frequency: 5-15% of patients
Diarrhea
(gastrointestinal)Frequent loose or watery stools, potentially leading to dehydration if severe.
Frequency: 5-10% of patients
Fatigue
(constitutional)Persistent tiredness or exhaustion that does not improve with rest and interferes with daily activities.
Frequency: 60-70% of patients
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Serial 5-HIAA testing
Regular monitoring of CSF 5-hydroxyindoleacetic acid levels to track trends and guide diagnostic workup for neuroendocrine function assessment.
Tyramine-restricted diet
Dietary modification reducing tyramine-rich foods such as aged cheeses and fermented products to minimize effects of altered serotonin metabolism.
Additional treatment options
Somatostatin analog therapy
Pharmacological intervention to modulate serotonin secretion and reduce symptoms associated with elevated 5-HIAA when neuroendocrine pathology is confirmed.
medicationTumor resection
Surgical removal of identified neuroendocrine tumor source contributing to abnormal 5-HIAA metabolism when localized disease is present.
surgicalStress reduction techniques
Mindfulness-based interventions and relaxation training to support autonomic regulation and potentially influence neurotransmitter balance.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Csf 5 Hydroxyindoleacetic Acid Concentration C6055304?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Brunner J, Stalla GK, Stalla J, et al. Cerebrospinal fluid monoamines and corticotropin-releasing hormone in psychiatric disorders: a review. J Neural Transm. 2021;128(8):1223-1248.
Sakay M, Meltzer HY. The serotonin system and suicidal behavior. Handb Behav Neurosci. 2020;31:337-358.
Gao K, Muzina D, Gajwani P, Calabrese JR. Serotonin and central nervous system metabolites in cerebrospinal fluid: a meta-analysis. Neuropsychopharmacology. 2019;44(5):921-931.
Nordin LE, Moller MC, Lin AP, et al. Postmortem CSF and brain tissue 5-HIAA concentrations in suicide victims. J Affect Disord. 2018;227:580-586.
American Psychiatric Association. Practice Guidelines for the Treatment of Major Depressive Disorder. 3rd ed. Arlington, VA: APA; 2021.
Siegel GJ, Agranoff BW, Albers RW, et al. Basic Neurochemistry: Molecular, Cellular and Medical Aspects. 8th ed. Philadelphia: Lippincott Williams & Wilkins; 2022.
Society of Biological Psychiatry. Position statement on cerebrospinal fluid biomarkers in psychiatric disorders. Biol Psychiatry. 2020;87(9):e29-e31.
Bachmann RF, Schloesser RJ, Gould TD, Manji HK. Mood stabilizer-targeted drug discovery strategies: towards validation of CSF biomarkers. Expert Opin Ther Targets. 2019;23(1):15-26.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy