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The name "familial anhidrosis" is synonymous with Ross syndrome and refers to a very rare (< than 100 cases have been reported since Ross first described it in 1958) neurological-dermatological disorder characterized by the simultaneous occurrence of areflexia and tonic pupil, decreased or absent segmental sweat secretion (hypohidrosis), and other functional disorders . For further details see below. Ross syndrome.
Prof. Dr. med. Peter Altmeyer