Abstract：
:Adrenal scintigraphy with 131I-6 beta-iodomethylnorcholesterol (NP-59) has been widely used to evaluate adrenal cortical tumors during the past 20 years. Unilateral visualization on the side of an adrenal tumor has been considered diagnostic of a benign adrenocortical adenoma in the patient with Cushing's syndrome. Bilateral nonvisualization of the adrenal glands in the presence of Cushing's syndrome is considered diagnostic of adrenocortical carcinoma (ACC). ACCs characteristically are unable to incorporate enough NP-59 to be visualized on NP-59 adrenal scintigraphy. Two patients with well-differentiated cortisol-secreting ACCs, in which the primary tumor or subsequent metastases demonstrated intense uptake (visualization) on NP-59 scans are reported here. As a result of these findings on NP-59 adrenal scintigraphy, the lesions were initially misinterpreted to represent benign disease. In each patient the operative approach selected, based on the interpretation of the NP-59 scan, was inappropriate for the management of the respective adrenal neoplasm or its metastasis. A review of the literature reveals 16 other cases of either ACC or their metastases that were visualized with adrenal scintigraphy. Ninety percent of these cases were associated with adrenocortical hormone hypersecretion. It is concluded that in the presence of Cushing's syndrome or another adrenocortical hormone excess state, unilateral visualization of an adrenal tumor on NP-59 scintigraphy cannot be interpreted to represent uniformly benign disease.
journal_name
Surgeryjournal_title
Surgeryauthors
Pasieka JL,McLeod MK,Thompson NW,Gross MD,Schteingart DEsubject
Has Abstractpub_date
1992-11-01 00:00:00pages
884-90issue
5eissn
0039-6060issn
1532-7361journal_volume
112pub_type
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