Abstract
Objective: To assess the performance of Current clinical recommendations for the evaluation of an adrenal incidentaloma.
Design and methods: Literature review. Electronic databases (Pubmed, Ovid and citation searches from key articles) from 1980 to 2008 were searched. Eligible studies were those deemed most applicable to the clinical scenario of a patient referred to an endocrinologist for assessment of all incidentally detected adrenal mass. Surgical series, histopathological series and oncological series were reviewed and most were excluded.
Results: The prevalence of functional and malignant lesions presenting its adrenal incidentaloma was similar to that quoted in most reviews. other than a lower incidence of adrenal carcinoma (1.9 vs 4.7%) and metastases (0.7 vs 2.3%,). The development of functionality or malignancy during follow-up was rare (<1% becoming functional and 0.2%) becoming malignant). During follow-up, false-positive rates of the recommended investigations are typically 50 times greater than true positive rates. The average recommended computed tomography (CT) scan follow-up exposes each patient to 23 mSv of ionising radiation. equating to a 1 in 430 to 2170 chance of causing fatal cancer. This is similar to the chance of developing adrenal malignancy during 3-year follow-up of adrenal incidentaloma.
Conclusion: Current recommendations for evaluation of adrenal incidentaloma are likely to result ill significant costs, both financial and emotional. due to high false-positive rates. The close of radiation involved in currently recommended CT scan follow-up confers a risk of fatal cancer that is similar to the risk of the adrenal becoming malignant. This argues for a review, of current guidelines.