Cgagtissqlimstn
Key facts at a glance
- LOINC
- 10472-9
- Short code
- CHGA
- Synonyms
- Cg Ag Tiss Ql ImStn
- Category
- chemistry
- Sample
- serum
- Container
- 10% neutral buffered formalin container for tissue specimens; sterile container for fresh tissue. Serum/plasma collected in serum separator tube (SST) or plasma separator tube (PST) if serum testing is also ordered.
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- immune-stain
- CPT
- 88342
- SNOMED
- 25073002
- Specimen volume
- Tissue: Adequate biopsy or resection specimen (minimum 0.1 cm³ or larger depending on lesion size); Serum: 1-2 mL of serum
- Stability
- Formalin-fixed paraffin-embedded (FFPE) tissue: indefinite at room temperature. Fresh tissue: process within 1-2 hours or fix promptly. Serum (if applicable): 8 hours at room temperature, 48 hours at 2-8°C, or 3 months at -20°C or below for long-term storage.
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 24–72 hours
- Order
- routine
Reference range
Reported as Positive or Negative for Chromogranin A immunoreactivity in tissue. Staining intensity may be graded as 1+ (weak/focal), 2+ (moderate), or 3+ (strong/diffuse). Normal neuroendocrine cells show positive cytoplasmic granular staining.N/A
No special patient preparation required for the tissue specimen itself. However, for serum chromogranin A testing, fasting may be recommended by some laboratories. For tissue biopsy specimens, coordination with surgical or interventional team is essential to ensure proper fixation (typically 10% neutral buffered formalin) and handling.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy