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- W2019949703 abstract "The clinical course, histology, and steroid secretion observed in two patients with hilus cell tumors are presented. One patient had signs of virilism and the other had estrogenic signs only. Steroid secretion was examined by measuring peripheral and ovarian venous gradients and pre- and postoperative levels of hormones to explain the profound differences in the biological effects exerted by the neoplasms. In the patient with virilism, the tumor's major secretory product was testosterone (T), and the dominant biosynthetic pathway was pregnenolone (Pe) leads to 17-hydroxypregnenolone leads to 17-hydroxyprogesterone leads to androstenedione (delta) leads to T. In the patient with estrogenic signs, the major secretory product was delta, derived from a similar pathway of pregnenolone leads to 17-hydroxypregnenolone leads to 17-hydroxyprogesterone leads to delta. Circulating estrone and estradiol levels were elevated, but the tumor showed limited aromatase activity, as reflected by 60- to 1500-fold larger peripheral-ovarian venous gradients of delta and T than estrone and estradiol. The high circulating estrogen levels mainly arose from the peripheral aromatization of the increased secretion of delta by the tumor. It was concluded that a similar steroidogenic pathway was employed by both tumors. The predominant secretion by the neoplasm of either T of delta was determined by the presence and the oxidation reduction equilibrium of the 17 beta-dehydrogenase enzyme. The action of this enzyme resulted in profound differences in the biological effects exerted by these tumors." @default.
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- W2019949703 title "Steroid Secretion by Masculinizing and “Feminizing” Hilus Cell Tumors*" @default.
- W2019949703 doi "https://doi.org/10.1210/jcem-52-4-779" @default.
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