Pseudocysts do not have an epithelial lining and typically arise after an episode of adrenal haemorrhage. There is an ~7% association with malignancy (e.g. from haemorrhage into a cystic adrenal neoplasm) 6.
Adrenal pseudocysts appear as a simple cyst or may have a complicated appearance (i.e. septations, blood products, or a soft-tissue component).
Calcification may be present 4. Usually, there is no enhancement post contrast.
Imaging differential considerations include:
- cystic adrenal neoplasm: often has an enhancing component.
- 1. Elsayes KM, Mukundan G, Narra VR et-al. Adrenal masses: mr imaging features with pathologic correlation. Radiographics. 2004;24 Suppl 1 (suppl 1): S73-86. doi:10.1148/rg.24si045514 - Pubmed citation
- 2. Ujam AB, Peters CJ, Tadrous PJ et-al. Adrenal pseudocyst: Diagnosis and laparoscopic management - A case report. Int J Surg Case Rep. 2011;2 (8): 306-8. doi:10.1016/j.ijscr.2011.10.002 - Free text at pubmed - Pubmed citation
- 3. Demir A, Tanidir Y, Kaya H et-al. A giant adrenal pseudocyst: case report and review of the literature. Int Urol Nephrol. 2006;38 (1): 167-9. doi:10.1007/s11255-005-3422-z - Pubmed citation
- 4. Wang LJ, Wong YC, Chen CJ et-al. Imaging spectrum of adrenal pseudocysts on CT. Eur Radiol. 2003;13 (3): 531-5. doi:10.1007/s00330-002-1537-5 - Pubmed citation
- 5. Sakamoto I, Nakahara N, Fukuda T et-al. Atypical appearance of adrenal pseudocysts. J. Urol. 1994;152 (1): 150-2. Pubmed citation
- 6. 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