56 research outputs found
Une hyperandrogénie chez la femme ménopausée : origine ovarienne ou origine surrénalienne ?
International audiencePostmenopausal hyperandrogenism is an androgen excess originating from either the adrenals and/or the ovaries. Clinically, symptoms can be moderate (increase in terminal hair growth, acnea) or severe with signs of virilization (alopecia, clitoridomegaly). In either setting, physicians need to exclude relatively rare but potentially life-threatening underlying tumorous causes, such as adrenal androgen-secreting tumors. The objectives of this review are to evaluate which hormonal measurements (T, delta 4 androstenedione, 17 OH progesterone, SDHEA, FSH, LH) and/or imaging (pelvic ultrasound, MRI or adrenal CT-scan) could be useful identifying the origin of the androgen excess. Our review illustrates that the rate of progression of hirsutism and/or alopecia, and serum testosterone levels are in favor of tumors. Pelvic MRI and adrenal CT-scan are useful tools for identifying the different causes of androgen excess.LâhyperandrogĂ©nie est dĂ©finie par un excĂšs dâandrogĂšnes. Chez les femmes, avant et aprĂšs la mĂ©nopause, les 2 sources dâandrogĂšnes sont les ovaires et les surrĂ©nales. Cliniquement, les patientes ayant une hyperandrogĂ©nie, avant et aprĂšs la mĂ©nopause, peuvent prĂ©senter des signes cliniques modĂ©rĂ©s tels que lâhirsutisme/lâacnĂ© et/ou des signes de virilisation (alopĂ©cie, raucitĂ© de la voix, hypertrophie clitoridienne). Cette variation est en partie liĂ©e Ă la sĂ©vĂ©ritĂ© de lâexcĂšs. Une des difficultĂ©s principales de la prise en charge de lâhyperandrogĂ©nie aprĂšs la mĂ©nopause est de distinguer les Ă©tiologies ovariennes des Ă©tiologies surrĂ©naliennes. Il est important dâĂ©liminer les causes tumorales qui sont rares, mais potentiellement menaçantes, telles que le corticosurrĂ©nalome malin. Lâobjectif de cette revue est dâĂ©valuer la pertinence des diffĂ©rents dosages hormonaux (T, 17 OH progestĂ©rone, SDHEA, LH, FSH) et des imageries (Ă©chographies, scanner, IRM) pour identifier lâorigine de la sĂ©crĂ©tion androgĂ©nique en sâappuyant sur un cas clinique dâhyperandrogĂ©nie sĂ©vĂšre chez une femme mĂ©nopausĂ©e. Dans la littĂ©rature, la rapiditĂ© dâĂ©volution de lâhyperandrogĂ©nie et les valeurs seuils de testostĂ©rone sont les principaux marqueurs dâune origine tumorale. Le SDHEA nâest pas discriminant. Le cathĂ©tĂ©risme des veines ovariennes est peu informatif. Lâimagerie, en particulier le scanner surrĂ©nalien ou lâIRM pelvienne, reprĂ©sente lâoutil le plus appropriĂ© afin de faciliter la distinction entre les diffĂ©rents diagnostics et permettre lâidentification de lâĂ©tiologie
Measurement of the Z 0 line shape parameters and the electroweak couplings of charged leptons
Contains fulltext :
125119.pdf (preprint version ) (Open Access
A test of higher-order electroweak theory in z0 decays to 2 leptons with an associated pair of charged-particles
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124397.pdf (publisher's version ) (Open Access
Measurement of three-jet distributions sensitive to the gluon spin ine + e â annihilations at sâ=91 GeV
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124457.pdf (publisher's version ) (Open Access
A search for doubly charged higgs production in z0 decays
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124394.pdf (preprint version ) (Open Access
A measurement of electron production in hadronic Z0 decays and a determination of GAMMA (Z0 --> b anti-b)
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124390.pdf (postprint version ) (Open Access
First measurement of the left-right cross-section asymmetry in Z boson production by e+ e- collisions
We present the first measurement of the left-right cross section asymmetry (A(LR)) for Z boson production by e+e- collisions. The measurement was performed at a center-of-mass energy of 91.55 GeV with the SLD detector at the SLAC Linear Collider which utilized a longitudinally polarized electron beam. The average beam polarization was (22.4 +/- 0.6)%. Using a sample of 10224 Z decays, we measure A(LR) to be 0.100 +/- 0.044(stat) +/- 0.004(syst), which determines the effective weak mixing angle to be sin2theta(W)eff=0.2378 +/- 0.0056(stat) +/- 0.0005(syst)
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