WHEN THE ENEMY IS NOT HIDING
A CASE OF SEVERE CUSHING'S SYNDROME SECONDARY TO ACTH-SECRETING NASAL PARAGANGLIOMA
Keywords:
severe Cushing's syndrome, ectopic ACTH secretion, head and neck paragangliomaAbstract
CASE
Ectopic secretion of ACTH is often an endocrine emergency because of its intensity of hypercortisolism. Only 5% of paragangliomas of the head and neck region are hormonally active. A 35-year-old Malaysian female developed a generalized seizure. She had Cushingoid features with profound hypokalemia and hyperglycemia. She had elevated levels of morning cortisol (12,136 nmol/L, >19 times elevated) and 24-hour urine cortisol (71,442.6 nmol/day, >60 times elevated), unsuppressed cortisol following overnight dexamethasone test, and elevated ACTH (49.9 pmol/L). Imaging studies revealed a locally invasive sinonasal tumour extending into the cranium with bilateral adrenal gland hyperplasia. Ketoconazole and metyrapone combination therapy failed to control hypercortisolemia. Etomidate infusion was then started preoperatively in preparation for bilateral adrenalectomy. Tumour resection was performed successfully via endoscopic and transcranial approaches. Pathological examination confirmed neuroendocrine tumour cells of low Ki-67 proliferative index with positive staining for ACTH.
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Copyright (c) 2023 Chee Koon Low, Yoke Mui Ng, Gayathri Devi Krishnan, Shazatul Reza Mohd Redzuan, Nor Haizura Abd Rani, Azmi Alias, Subashini Rajoo, Mohamed Badrulnizam Long Bidin
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