Screening for ACTH-dependent hypercortisolism in patients affected with pituitary incidentaloma

Area of Science:

• Endocrinology
• Oncology
• Internal Medicine

Background:

• Pituitary incidentalomas (PIs) are common, but their management remains controversial.
• Systematic screening for subclinical ACTH-dependent hypercortisolism (AH) in PIs is not standard due to limited data.
• Subclinical hypercortisolism (SH) may lead to chronic complications similar to overt cortisol excess.

Purpose of the Study:

• To determine the prevalence of hypercortisolism in patients with PIs.
• To assess the clinical relevance of subclinical hypercortisolism in this population.

Main Methods:

• Prospective investigation of 68 patients with PIs for AH between 2010-2013.
• Diagnostic criteria included post-dexamethasone suppression test cortisol levels, non-suppressed ACTH, and elevated urinary free cortisol or midnight cortisol levels.
• Biochemical and histological confirmation of AH were assessed.

Main Results:

• A 7.3% prevalence of pituitary hypercortisolism was identified based on biochemical criteria.
• Histologically confirmed ACTH-dependent hypercortisolism was found in 4.4% of patients.
• These findings suggest a higher incidence than previously recognized.

Conclusions:

• Subclinical or mild hypercortisolism may be more prevalent in patients with PIs than commonly believed.
• Early diagnosis and management of SH in PIs could prevent long-term health issues.
• Further research is warranted to establish screening guidelines for PIs.