Related Experiment Videos
Human pituitary tumors secrete chromogranin-A
L J Deftos1, D T O'Connor, C B Wilson
1Department of Medicine, University of California-San Diego.
Summary
Chromogranin-A (CgA) is a common marker in pituitary tumors. Elevated serum CgA levels and CgA-positive cells in tissue aid in identifying and classifying these endocrine tumors.
Area of Science:
- Endocrinology
- Oncology
- Pathology
Background:
- Chromogranin-A (CgA) is a known marker for various endocrine tumors.
- Its role in pituitary tumors requires further clinical evaluation.
Purpose of the Study:
- To assess the clinical utility of CgA as a serum and tissue marker in patients with pituitary tumors.
- To determine the prevalence and significance of CgA in pituitary tumor classification.
Main Methods:
- Serum CgA levels were measured in 15 patients with pituitary tumors.
- Immunohistochemical staining for CgA was performed on anterior pituitary tumor tissues.
Main Results:
- Elevated serum CgA levels were observed in one-third of patients.
- CgA-positive cells were detected in 9 out of 11 anterior pituitary tumors analyzed.
- Elevated CgA was noted in non-secreting tumors and corticotroph adenomas.
Conclusions:
- CgA production is frequent in pituitary tumors.
- Immunohistochemistry for CgA can assist in pituitary tumor classification.
- Serum CgA measurement may help detect pituitary tumors, particularly non-functioning ones.