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[Postural changes in systemic sclerosis: preliminary results].

Systemic Sclerosis (SSc) is a generalized disease of unknown etiology which frequently presents neurological involvement of the central or peripheral nervous system. Besides various types of neuropathies, at times postural alterations of uncertain genesis can be found. Such alternations have never undergone organic study. The present work evaluates the static posture of subjects suffering from SSc without any subjective otoneurological symptoms. A total of 30 subjects-10 normal volunteers and 20 patients suffering from SSc-underwent full clinical examination, immunological testing (immunoglobulin; ANA; anti-ENA, anti-centromere, anti-SCL70, anti-DNA, anti-cardiolipin antibodies; C3, C4; circulating immunocomplexes) and capillaroscopy of the periunguis vallecula. The capillaroscopy data showed 2 distinct general pictures of sclerodermic microangiopathy: 1) a "slow pattern", not particularly aggressive, where capillarectasia and neoangiogenesis prevail; 2) an "active pattern", highly aggressive, where architectural disorder, capillary loss with the formation of avascular areas prevail. The 20 SSc subjects following the same therapy and free of any significant otoneurological, vasculo-metabolic or osteoarticular pathologies and the 10 healthy volunteers of compatible age and sex, underwent computerized Static Posturography (S.Ve.P-Amplaid). The immunological examinations showed that all patients were positive for ANA, 12 tested positive for anti-SCL70 antibodies and 7 for anti-centromere antibodies. The results of posturography showed a significant increase in parameter: "surface" and "standard deviation of velocity" with closed eyes. Spectra frequency analysis, processed using a personal method, showed a significant increase in panfrequency oscillations vs. the controls on both axes and both with eyes open and closed. The preliminary results of this study, which from reviewing the literature we believe to be the first of its kind performed, appear to indicate a subclinical suffering upon postural control in SSc: the alterations in the posturographic spectral frequency analysis indicate that all postural control mechanisms are extensively compromised, causing a pluriplanar, multifrequency destabilization both with and without the use of vision.