[Paraneoplastic syndromes].
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Biomedical subjects
Publications and source records attributed to J Lefebvre.
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Plasma renin activity (P.R.A.) and plasma aldosterone were measured in twelve patients having hypopituitarism. Both mean values of this group were significantly lower than in normal subjects (P.R.A. recumbent: p less than 0.001, upright: p less than 0.001, plasma aldosterone: recumbent: p less than 0.02, upright: p less than 0.005). Hyporeninism is a controversed feature in hypopituitarism. Our preliminary data suggest that it is not directly correlated to ACTH or cortisol deficiency. Nevertheless it may explain the hypoaldosteronism prior reported in such patients.
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Plasmatic concentrations of thyroxine (T4-D-) and triiodothyronine (T3 RI) were evaluated in 32 Graves' diseases on treatment by carbimazol. Among 131 measures, T4 and T3 were dissociated in 56%, with T3 more elevated than T4 in 89%. Compensated hypothyroidism was frequently seen (35%).