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Prevalence of adrenal incidentaloma in a contemporary computerized tomography series

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Abstract

Adrenal incidentalomas, defined as masses discovered incidentally during imaging investigation of non-adrenal disorders, have become a rather common finding in clinical practice. The prevalence is not well characterized and varies among studies. The aim of the present study was to perform a prospective evaluation of the prevalence of adrenal incidentalomas among subjects undergoing computerized tomography (CT) scan of the chest in a screening program of lung cancer (Tic TAC study) in Piedmont, a region of Northwestern Italy. This evaluation included 520 subjects (382 males and 138 females, aged between 55–82 yr), referred to our hospital from April to December 2001. Twenty-three patients with adrenal masses were identified: 21 adrenal adenomas, 1 myelolipoma, and 1 metastasis of lung cancer. Therefore, the overall prevalence of adrenal lesions was 4.4%, and that of benign adrenal masses was 4.2%. This prevalence is higher than those found in previous CT scan series reported in the literature, probably because of the use of high-resolution CT scanning technology. Another factor that influenced our results is that subject age is skewed towards the decades characterized by a greater occurrence of adrenal masses. The outcome of this study confirms that we are presently able to identify incidentally discovered adrenal masses more often than in early years and that the prevalence of adrenal incidentalomas on CT images is approaching that of autopsy series. The present study provides a reliable estimate of the prevalence of adrenal incidentaloma with currently used CT scanners. Notwithstanding that our subjects were at increased risk of lung cancer, the rate of adrenal metastases was low. We think that the present results can be generalized even if we may disclose the lack of histological diagnosis.

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Authors and Affiliations

  1. Department of Biological and Clinical Sciences, Internal Medicine I, Italy

    S. Bovio, G. Reimondo, A. Angeli & M. Terzolo MD

  2. Radiology, Italy

    A. Cataldi & C. Fava

  3. Medical Oncology, Italy

    P. Sperone, A. Berruti & L. Dogliotti

  4. Department Unit of Pulmonary Oncology, Italy

    S. Novello & G. V. Scagliotti

  5. Thoracic Surgery, ASO San Luigi, University of Turin, Turin, Italy

    P. Borasio

Authors
  1. S. Bovio
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  2. A. Cataldi
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  3. G. Reimondo
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  4. P. Sperone
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  5. S. Novello
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  10. G. V. Scagliotti
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  11. A. Angeli
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  12. M. Terzolo MD
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Correspondence to M. Terzolo MD.

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Bovio, S., Cataldi, A., Reimondo, G. et al. Prevalence of adrenal incidentaloma in a contemporary computerized tomography series. J Endocrinol Invest 29, 298–302 (2006). https://doi.org/10.1007/BF03344099

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