Adrenal Incidentaloma With the Diagnosis of Normotensive Pheochromocytoma: A Case Report
Pheochromocytomas (PCCs) are catecholamine-producing neuroendocrine tumors that originate from the adrenal medulla. Their clinical presentations most commonly include hypertension, headache, palpitations, and sweating; however, PCCs are sometimes normotensive and clinically silent.
A female patient with abdominal pain as well as persistent and crushing left flank pain for the past six months was examined. The imaging studies revealed a mass in the upper pole of the left kidney indicative of a potential adrenal gland tumor; however, she had normal blood pressure (BP). Histopathologic examination of the mass from exploratory laparotomy showed that it was a PCC. Findings from sonography and computed tomography (CT) scan of the left adrenal tumor, along with elevated urinary normetanephrine level and positive iodine-123 metaiodobenzylguanidine (MIBG) scan led to preoperative diagnosis of PCC in our case.
This study highlighted the importance of imaging and biochemical testing in diagnosing PCCs in patients with adrenal incidentalomas (AIs), even though they were normotensive and entirely asymptomatic.
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