Summary
We present the case of a 39-year-old man with Klinefelter's syndrome and metastatic Leydig cell carcinoma in whom autonomous cortisol production induced by the interstitial cell tumor was found. Apart from the Cushing's syndrome the endocrine activity of the tumor was demonstrated by the secretion of estradiol, estrone, alkaline phosphatase, and testosterone. This is, to our knowledge, the first description of a Cushing's syndrome not caused via ACTH production but directly induced by ectopic steroid production. While being resistent to chemotherapy and radiation, the tumor responded favorably to treatment with o,p′-DDD. The reduction of tumor size was accompanied by a continuous decrease of serum markers.
The etiology of the tumor is discussed in the light of the hormonal derangement caused by the genetic abnormality of Klinefelter's syndrome.
Zusammenfassung
Wir berichten über einen 39jährigen Patienten mit einem Klinefelter-Syndrom, bei dem sich die autonome Produktion von Cortisol durch einen metastasierenden Leydig-Zell-Tumor nachweisen ließ. Die endokrine Tumoraktivität zeigte sich — neben einem Cushing-Syndrom — in der abnormen Sekretion von Östradiol, Östron, alkalischer Phosphatase und Testosteron. Es handelt sich dabei unseres Wissens um den ersten beschriebenen Fall eines Cushing-Syndroms, das nicht über die Bildung von ACTH, sondern durch ektope Steroidproduktion verursacht wurde.
Bei fehlender Radio- und Chemotherapiesensibilität zeigte sich eine Tumorrückbildung während der Behandlung mit o,p′-DDD, die mit einem dauerhaften Abfall der biologischen Tumormarker verbunden ist. Die Ätiologie des Tumors im Zusammenhang mit dem Klinefelter-Syndrom wird besprochen.
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Knyrim, K., Higi, M., Hossfeld, D.K. et al. Autonomous cortisol secretion by a metastatic Leydig cell carcinoma associated with Klinefelter's syndrome. J Cancer Res Clin Oncol 100, 85–93 (1981). https://doi.org/10.1007/BF00405905
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DOI: https://doi.org/10.1007/BF00405905