Incidentally discovered myelolipomatous adrenal adenomas, including six cases presenting with hypercortisolism.

Pathology, Research and Practice
Katrina CollinsLiang Cheng

Abstract

Most adrenal incidentalomas are non-functioning adenomas that require no treatment. The presence of a myelolipomatous component of adrenal incidentalomas is a rare, but well-known occurrence in both hyperplastic and neoplastic lesions of the adrenal cortex. Although the improvements in abdominal imaging have increased identification of myelolipomatous adrenal cortical adenomas radiologically, due to the rarity of this lesion, the clinical pathological features of these lesions are unclear and can sometimes cause diagnostic difficulty. Eleven patients had surgeries at The University of Texas MD Anderson Cancer Center. Four additional cases were provided from an external collaborator. Of the 15 cases, there were 5 male and 10 female patients, with a median age of 52 years (mean 54 years, range 28-84 years). Clinical presentation included adrenal incidentaloma (n = 9), Cushing syndrome (n = 4, including 1 as a part of Carney complex), and subclinical Cushing syndrome (n = 2, including 1 with bilateral macronodular adrenal hyperplasia). In this study, we present the clinicopathologic features of fifteen myelolipomatous adrenal adenomas, the largest series published thus far.

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