Abstract
The authors report a case of an ectopic ACTH-syndrome that resulted in severe hypercortisolism, hypokalemia, diabetes mellitus and osteoporosis. The ACTH-secreting tumor tissue was localized in the lung. The tumor was removed by segmentectomy and histological evaluation revealed an ACTH-secreting neuroendocrine tumor. After surgery, however, plasma cortisol and ACTH levels failed to decrease significantly due to subtotal tumor removal. Long-acting somatostatin analogue therapy resulted in a normalization of both plasma cortisol and ACTH levels and the clinical symptoms improved significantly. Residual tumor was removed by repeat surgery and the patient was permanently cured.
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