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Imaging of adrenal masses
1Department of Radiology, University of Michigan Medical Center, Ann Arbor, USA.
The Urologic Clinics of North America
|August 1, 1997
Summary
Most adrenal masses found on CT scans lack specific features. Imaging techniques like chemical shift MR and CT densitometry are improving diagnosis for non-functioning adrenal masses, guiding treatment decisions.
Area of Science:
- Radiology
- Endocrinology
- Oncology
Background:
- Adrenal masses are frequently detected incidentally on CT scans.
- A minority of adrenal masses exhibit morphologic features suggestive of specific histologic diagnoses.
- Hyperfunctioning adrenal masses often lead to surgical resection based on CT findings.
Purpose of the Study:
- To review the clinical features and imaging findings of patients with adrenal masses.
- To discuss diagnostic approaches for both hyperfunctioning and non-hyperfunctioning adrenal masses.
- To highlight advancements in imaging modalities for adrenal mass characterization.
Main Methods:
- Review of clinical features and imaging findings in patients with adrenal masses.
- Discussion of CT, iodomethylnorcholesterol scintigraphy, MIBG scintigraphy, chemical shift MR, and CT densitometry.
- Comparison of diagnostic accuracy and clinical utility of various imaging techniques.
Main Results:
- CT is the primary modality for adrenal mass detection but often lacks specificity.
- Functional assessment using scintigraphy can augment CT findings in hyperfunctioning adrenal syndromes.
- Chemical shift MR and CT densitometry are increasingly used to diagnose non-hyperfunctioning adrenal masses, potentially replacing biopsy or serial CT.
Conclusions:
- Accurate diagnosis of adrenal masses relies on integrating clinical, biochemical, and advanced imaging findings.
- Chemical shift MR and CT densitometry represent significant advancements in non-invasive adrenal mass diagnosis.
- A comprehensive understanding of imaging features is crucial for appropriate patient management.