{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T21:12:47Z","timestamp":1780521167089,"version":"3.54.1"},"reference-count":24,"publisher":"Oxford University Press (OUP)","issue":"4","content-domain":{"domain":["eje.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":["eur j endocrinol"],"published-print":{"date-parts":[[2005,4]]},"abstract":"<jats:p>We report a case of a young woman with Cushing\u2019s syndrome (CS), in whom although endocrine investigations and negative pituitary imaging were suggestive of ectopic ACTH secretion, the results of inferior petrosal sinus (IPS) sampling after coricotropin-releasing hormone (CRH) stimulation were suggestive of pituitary ACTH hypersecretion. <jats:sup>111<\/jats:sup>In-labelled octreotide and high-resolution computer tomography (CT) revealed a lesion possibly responsible for the ACTH source in the thymus. Thymectomy confirmed concomitant ectopic CRH and probable ACTH production by a thymic neuroendocrine carcinoma. After an 8-year remission period the patient developed a clinical and biochemical relapse. A high-resolution computed tomography (CT) scan of the thorax showed a 2-cm nodule in the thymic bed, which was positive on a [<jats:sup>18<\/jats:sup>F]fluoro-2-deoxy-<jats:sc>d<\/jats:sc>-glucose ([<jats:sup>18<\/jats:sup>F]FDG) positron emission tomography (PET) scan. However, a repeated thymectomy did not result in remission. A repeat [<jats:sup>18<\/jats:sup>F]FDG PET study showed persistent disease in the thymic bed and also uptake in the adrenals. The patient underwent bilateral adrenalectomy, which resulted in clinical remission. A further [<jats:sup>18<\/jats:sup>F]FDG PET scan 8 months later showed no progression of the thymic tumor and confirmed complete excision of the adrenals. This is a rare case of concomitant CRH and ACTH secretion from a thymic carcinoid tumor; the case illustrates the usefulness of functional imaging with [<jats:sup>18<\/jats:sup>F]FDG PET in the diagnosis, management and follow-up of neuroendocrine tumors.<\/jats:p>","DOI":"10.1530\/eje.1.01839","type":"journal-article","created":{"date-parts":[[2005,4,7]],"date-time":"2005-04-07T23:04:13Z","timestamp":1112915053000},"page":"521-525","update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-1","source":"Crossref","is-referenced-by-count":41,"title":["[18F]fluoro-2-deoxy-d-glucose ([18F]FDG) positron emission tomography imaging of thymic carcinoid tumor presenting with recurrent Cushing\u2019s 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