Renal Adenocarcinoma with Solitary Metastasis to the Contralateral Adrenal Gland: Report of 2 Cases and Review of the Literature

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Abstract
We report 2 rare cases of renal adenocarcinoma with solitary metastasis to the contralateral adrenal gland, 1 recognized synchronously with the primary neoplasm and 1 found 15 years after nephrectomy. The latter case represents the longest reported interval between nephrectomy and treatment of a solitary contralateral adrenal metastasis of renal adenocarcinoma. Distinction of these metastatic tumors from primary adrenocortical carcinoma was facilitated by immunohistochemical markers. Twelve other reported cases of renal adenocarcinoma with solitary contralateral adrenal metastasis support aggressive surgical management of this lesion.