[Platelet serotonin absorption in Turner's syndrome]

Functional activity of platelets was studied in 20 patients with Shereshevsky-Turner's syndrome. There was revealed a significant rise of platelet serotonin (5-hydroxytryptamine) content and also a reduction of exogenous serotonin absorption by platelets. The noted disturbances pointed to dysfunction of these cells, this serving as an auxiliary factor pointing out that the ageing process involved the blood elements. Reduction of platelet functional activity in patients with monosomia X was apparently due to chromosomic unbalance and with the associated hormonal control disturbances.