Combined ulnar nerve palsy in Guyon's canal and distal median nerve irritation following excessive canoeing

Background: Compression in Guyon's canal is a rare cause of ulnar nerve palsy and is in many cases associated with certain occupations (i.e. prolonged bicycling, known as „cyclist's palsy“). Dependent on the location of the compression, three types of lesions with different patterns of sensory and motor disturbances can be distinguished. The combination of ulnar and median nerve palsy has been described in long-distance cyclists, but not in other sports. We report a patient with a distal ulnar lesion in Guyon's canal type III combined with a transient irritation of the median nerve following strenuous canoeing.…