Abstract
Purpose
To evaluate whether dexamethasone suppression treatment can improve 11 C-metomidate positron emission tomography (MTO-PET) detection of small adrenocortical adenomas in primary aldosteronism (PA).
Materials and methods
Eleven patients with proven PA and two patients with non-hyperfunctioning adrenocortical incidentalomas and small adrenocortical tumours observed on CT underwent MTO-PET before and 3 days after administration of oral dexamethasone suppression treatment. Small “hot-spot” regions of interest comprising 4 pixels (SUVhs) and 1 pixel (SUVmax) were placed in the tumour area with the highest radioactivity concentration and their respective standardised uptake values (SUV) were recorded.
Results
All tumours were detected and categorised as adrenocortical by MTO-PET. SUVhs as well as SUVmax were higher in PA compared to nonfunctional adenomas. Normal adrenal cortex was suppressed after dexamethasone (p < 0.05), but tumour SUV was not significantly decreased after suppression in either PA or nonfunctional tumours (p > 0.05). However, these changes caused no significant increase in the tumour-to-normal adrenal ratio (p > 0.05).
Conclusion
MTO-PET is a highly sensitive method for detecting and categorising even small adrenocortical tumours in PA. In this series, dexamethasone-suppressed MTO-PET was unable to increase the tumour-to-normal adrenal ratio to further facilitate detection of small adenomas in PA as an alternative to adrenal venous sampling.
Similar content being viewed by others
References
Stowasser M, Gordon RD, Gunasekera TG, Cowley DC, Ward G, Archibald C, Smithers BM (2003) High rate of detection of primary aldosteronism, including surgically treatable forms, after ‘non selective’ screening of hypertensive patients. J Hypertens 21:2149–2157
Mulatero P, Stowasser M, Loh KC, Fardella CE, Gordon RD, Mosso L, Gomez-Sanchez CE, Veglio F, Young WF Jr (2004) Increased diagnosis of primary aldosteronism, including surgically correctable forms, in centers from five continents. J Clin Endocrinol Metab 89:1045–1050
Funder JW, Carey RM, Fardella C, Gomez-Sanchez CE, Mantero F, Stowasser M, Young WF Jr (2008) Case detection, diagnosis, and treatment of patients with primary aldosteronism: an endocrine society clinical practice guideline. J Clin Endocrinol Metab 93(9):3266–3281
Mattsson C, Young WF Jr (2006) Primary aldosteronism: diagnostic and treatment strategies. Nat Clin Pract Nephrol 2:198–208
Letavernier E, Peyrard S, Amar L, Zinzindohoué F, Fiquet B, Plouin PF (2008) Blood pressure outcome of adrenalectomy in patients with hyperaldosteronism with or without unilaterlal adenoma. J Hypertens 26:1816–1823
Walz MK, Gwosdz R, Levin SL, Alesina PF, Suttorp AC (2008) Metz KA et al Retroperitoneoscopic adrenalectomy in Conn´s syndrome caused by adrenal adenoma or nodular hyperplasia. World J Surg 32(5):847–853
Enberg U, Volpe C, Höög A, Wedell A, Farnebo LO, Thorén M (2004) Hamberger B Postoperative differentiation between unilateral adenoma and bilateral adrenal hyperplasia in primary aldosteronism by mRNA expression of gene CYP11B2. Eur J Endocrinol 151(1):73–85
Pang TC, Bambach C, Monhagan JC, Siduh S, Bune A, Delbridge L, Sywak M (2007) Outcomes of laparoscopic adrenalectomy for hyperaldosteronism. ANZ J Surg 77(9):768–773
Gockel I, Heintz A, Polta M, Juninger T (2007) Long-term results of endoscopic adrenalectomy for Conn´s syndrome. Am Surg 73(2):174–180
Catena C, Coloussi G, Nadalini E, Chiuch A, Baroselli S, Lapenna L, Sechi LA (2008) Cardiovascular outcomes in patients with primary aldosteronism after treatment. Arch Intern Med 14;168(1):80-85
White ML, Gauger PG, Doherty GM, Cho KJ, Thompson NW, Hammer GD, Miller BS (2008) The role of radiologic studies in the evaluation and management of primary hyperaldosteronism. Surgery 144(6):926–933
Lombardi CP, Rafaelli M, De Crea C, Rufini V, Treglia G, Bellantone R (2007) Noninvasive adrenal imaging in hyperaldosteronism: is it accurate for correctly identifying patients who should be selected for surgery? Langenbecks Arch Surg 392(5):623–628
Zarnegar R, Bloom AI, Lee J, Kerlan RK Jr, Wilson MW, Laberge JM et al (2008) Is adrenal venous sampling necessary in all patients with hyperaldosteronism before adrenalectomy? J Vasc Interv Radiol 19(1):66–71
Bergström M, Juhlin C, Bonasera TA, Sundin A, Rastad J, Akerstrom G, Långström B (2000) PET imaging of adrenal cortical tumours with the 11ß-hydroxylase tracer 11C-metomidate. J Nucl Med 41:275–282
Hennings J, Lindhe Ö, Bergström M, Långström B, Sundin A, Hellman P (2006) [11C]-Metomidate positron emission tomography of adrenocortical tumours in correlation with histopathological findings. J Clin Endocrinol Metab 91:1410–1414
Zettinig G, Mitterhauser M, Wadsak W, Becherer A, Pirich C, Vierhapper H, Niederle B, Dudczak R, Kletter K (2004) Positron emission tomography imaging of adrenal masses: 18F-fluorodeoxyglucose and the 11ß-hydroxylase tracer 11C-metomidate. Eur J Nucl Med Mol Imaging 31:403–410
Minn H, Salonen A, Friberg J, Roivainen A, Viljanen T, Långsjö J, Salmi J, Valimäki M, Nagren K, Nuutila P (2004) Imaging of adrenal incidentalomas with PET using 11C-metomidate and 18F-FDG. J Nucl Med 45:972–979
Hennings J, Hellman P, Ahlström H, Sundin A (2009) Computed tomography, magnetic resonance imaging and 11C-metomidate positron emission tomography for evaluation of adrenal incidentalomas. Eur J Radiol 69(2):314–323
Gross MD, Shapiro B, Grekin RJ, Freitas JE, Glazer G, Beierwaltes WH, Thompson NW (1984) Scintigraphic location of adrenal lesions in primary aldosteronism. Am J Med 77:839–844
Gross MD, Shapiro B (1989) Scintigraphic studies in adrenal hypertension. Semin Nucl Med 19:122–143
Nocadie-Calzada M, Hulgo D, Lambert M, Ernst O, Proye C, Wemeau JL, Marchandise X (1999) Efficacy of iodine-131 6beta-methyl-iodo-19-norcholesterol scintigraphy and computed tomography in patients with primary aldosteronism. Eur J Nucl Med 26:1326–1332
Volpe C, Enberg U, Sjögren A, Wahrenberg H, Jacobsson H, Törring O, Hamberger B, Thorén M (2008) The role of adrenal scintigraphy in the preoperative management of primary aldosteronism. Scand J Surg 97:248–253
Conflicts of Interest
None.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hennings, J., Sundin, A., Hägg, A. et al. 11C-metomidate positron emission tomography after dexamethasone suppression for detection of small adrenocortical adenomas in primary aldosteronism. Langenbecks Arch Surg 395, 963–967 (2010). https://doi.org/10.1007/s00423-010-0681-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00423-010-0681-7