Considering the chronic irritation caused by collars, cancer of the neck is rare, although a few instances do occur. The neoplasms arising in this locality usually spring from moles, then forming nevocarcinomata, in the sense of Unna, or from congenital fibro-epithelial outgrowths, then forming typical rodent ulcers, more rarely squamous-celled neoplasms. Treatment is along the lines already indicated.