Chromogranin Immunostain, Technical Component Only
Use
Chromogranin A is widely expressed in neuronal tissues and in secretory granules of human endocrine cells such as parathyroid gland, adrenal medulla, anterior pituitary gland, Langerhans islets of the pancreas, and C-cells of the thyroid. It is useful for the identification of tumors with neuroendocrine differentiation such as pituitary adenomas, islet cell tumors, pheochromocytomas, medullary thyroid carcinomas, Merkel cell tumors, and carcinoids.
Special Instructions
This test includes only technical performance of the stain; no pathologist interpretation is provided. Technical component only stains should not be ordered with PATHC / Pathology Consultation. If ordered with PATHC, the technical component stains will be canceled.
Limitations
This test does not include pathologist interpretation, only technical performance of the stain. If interpretation is required, order PATHC / Pathology Consultation for a full diagnostic evaluation or second opinion of the case. The positive and negative controls are verified as showing appropriate immunoreactivity. Interpretation of this test should be performed in the context of the patient's clinical history and other diagnostic tests by a qualified pathologist. Age of a cut paraffin section can affect immunoreactivity. Stability thresholds vary widely among published literature and are antigen dependent. Best practice is for paraffin sections to be cut within 6 weeks.
FDA ApprovedNew York Approved
Methodology
Immunoassay (IHC)
Biomarkers
LOINC Codes
- Order only;no result
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Tissue (FFPE)
Volume
Not provided
Minimum Volume
Not provided
Container
Immunostain Technical Only Envelope
Collection Instructions
2 Unstained, positively charged glass slides (25- x 75- x 1-mm) per test ordered; sections 4-microns thick
Storage Instructions
Attach the green 'Attention Pathology' address label (T498) and the pink Immunostain Technical Only label included in the kit to the outside of the transport container.
Causes for Rejection
Wet/frozen tissue, Cytology smears, Nonformalin fixed tissue, Nonparaffin embedded tissue, Noncharged slides, ProbeOn slides, Snowcoat slides
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Ambient (preferred) |