131I‐6β‐Iodomethylnorcholesterol scintigraphy: an assessment of its role in the investigation of adrenocortical incidentalomas

OBJECTIVE Most incidentally discovered adrenal tumours (‘incidentaloma’) are benign adrenocortical adenomas. It has been suggested that 131I‐6β‐iodomethylnorcholesterol (IMC) scan could specify the degree of functional autonomy of such adenomas depending on whether they prevent contralateral adrenal tracer uptake. Our purpose was to examine this hypothesis in a correlated scintigraphic and endocrine study.

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