[Ross syndrome in a 38-year-old male].

Ross syndrome is a rare partial dysautonomic syndrome defined by the classic triad of segmental anhidrosis, Adie's tonic pupil and arreflexia. In addition to a secretory and protective function, the sweating is responsible for thermoregulation, which is necessary for maintaining body homeostasis, therefore hypohidrosis may compromise the ability of the person to work or exercise in any environmental conditions. We present a case of Ross Syndrome in a 38-year-old male with heat intolerance, which interfered with his daily work practice.