Allergic contact dermatitis to multiple sawdust allergens

A 73-year-old man presented with an 8-year history of a dermatitis affecting his face, dorsum of hands, and forearms. He was a retired cabinet maker but still carried out some timber work at home. He was patch tested and found to be positive to colophony and saw-dust samples from four different timbers: Silky Oak, Queensland Hoop Pine, Radiata Pine and Australian red cedar.