Relationship between cobalt and nickel sensitization in females

Abstract

The frequent occurrence of concomitant Ni and Co sensitivity is considered to be due to simultaneous sensitization from suspenders or jewelry. In a study population consisting of 168 unselected female twins, representing a random sample of the general population, only a few were found with concomitant Ni and Co sensitivity, and then mainly among those with hand dermatitis. Similar concomitant Co and Ni were found only in dermatological female patients with hand dermatitis. Concomitant Ni and Co sensitization from metal alloys worn in direct contact with the skin is apparently rare. Co sensitization is probably a phenomenon secondary to an already existing hand dermatitis.