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Primary aldosteronism: adrenal venous sampling

W F Young1, A W Stanson, C S Grant

  • 1Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905, USA.

Surgery
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Selective adrenal venous sampling is crucial for identifying the source of aldosterone excess in primary aldosteronism, even with normal or subtle adrenal CT findings. This helps pinpoint unilateral aldosterone production in various adrenal abnormalities.

Area of Science:

  • Endocrinology
  • Radiology
  • Internal Medicine

Background:

  • High-resolution adrenal computed tomography (CT) is increasingly used to detect subtle abnormalities in primary aldosteronism.
  • Interpreting the functional significance of micronodular changes on CT requires reevaluation of selective adrenal venous sampling.

Purpose of the Study:

  • To reevaluate selective adrenal venous sampling for interpreting functional significance of adrenal micronodular changes on CT scan.
  • To determine the source of aldosterone excess in patients with primary aldosteronism based on CT findings.

Main Methods:

  • Prospective selection of 34 primary aldosteronism patients for adrenal venous sampling based on CT findings.
  • CT findings included normal/minimal adrenal limb thickening, unilateral microadenoma, bilateral nodules, or atypical unilateral macroadenoma.

Related Experiment Videos

  • Adrenal venous sampling was performed, with successful bilateral catheterization in 33 patients.

    • Main Results:

    • 40% of patients with normal/minimal adrenal limb thickening had a unilateral aldosterone source.
    • Patients with apparent unilateral microadenoma had ipsilateral aldosterone-producing adenomas.
    • A unilateral aldosterone source was found in 44% of patients with bilateral adrenal masses and in three of four with atypical macroadenomas.

    Conclusions:

    • A unilateral source of aldosterone excess can be present in primary aldosteronism patients with normal or minimally thickened adrenal limbs on CT.
    • Adrenal venous sampling is essential for determining the aldosterone excess source in patients with bilateral adrenal masses or atypical macroadenomas.