[Compensatory hyperhidrosis on one side in a patient with Ross syndrome].

Ross syndrome involves three clinical signs: tonic pupil, hyporeflexia and segmental hypohidrosis. Sometimes the clinical picture also includes autonomic dysfunction. To our knowledge only 24 cases have been described in the literature, indicating that the syndrome is rare. We present a new case in which contralateral hemicorporal hyperhidrosis was, as usual, the key complementary feature leading to diagnosis.