To dream of seeing canker on anything, is an omen of evil. It foretells death and treacherous companions for the young. Sorrow and loneliness to the aged. Cankerous growths in the flesh, denote future distinctions either as head of State or stage life.
The last definition is not consistent with other parts of this book, but I let it stand, as I find it among my automatic writings. ... Ten Thousand Dream Interpretation