Adrenal cysts are rare lesions and are commonly incidental findings.
Adrenal cysts are reported to be rare with an incidence of <1% 1.
Patients can present with pain or swelling, although a significant portion (~40%) are incidental findings 1,3.
Adrenal cysts can be divided into four categories 1-3:
- endothelial cysts
- epithelial cysts
- including adult polycystic kidney disease (single case report) 4
- parasitic cysts, usually hydatid
Small adrenal cysts may be difficult to differentiate from adrenal adenomas on unenhanced CT as they may both have densities in the pure fluid range, i.e. -10 to +10. However on post-contrast CT adrenal adenomas tend to enhance, whereas cysts do not 5.
- 1. Dimitrios A. Linos, Jon A. van Heerden. Adrenal Glands. ISBN: 9783540268611
- 2. William E. Brant, Clyde A. Helms. Fundamentals of Diagnostic Radiology. ISBN: 9780781761352
- 3. Wedmid A, Palese M. Diagnosis and treatment of the adrenal cyst. Current urology reports. 11 (1): 44-50. doi:10.1007/s11934-009-0080-1 - Pubmed
- 4. Bastide C, Boyer L, Djellouli N, Baguet JC, Viallet JF. [Bilateral adrenal cysts and hepatorenal polycystic disease]. (1997) Presse medicale (Paris, France : 1983). 26 (15): 711-2. Pubmed
- 5. Ricci Z, Chernyak V, Hsu K, Mazzariol FS, Flusberg M, Oh S, Stein M, Rozenblit A. Adrenal cysts: natural history by long-term imaging follow-up. (2013) AJR. American journal of roentgenology. 201 (5): 1009-16. doi:10.2214/AJR.12.9202 - Pubmed
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