Syphilis of the larynx is the local manifestation in the larynx of constitutional lues. It is observed in all its different stages and may be either hereditary or acquired. It is classed as ( a ) the primary lesion, ( b ) the secondary, including the erythema, mucous patch and superficial ulcer, and ( c ) the tertiary, including the gumma, deep ulceration, perichondritis and stenosis. It is fortunately quite a rare manifestation in this disease, occurring in 2.9 per cent. of cases as observed by Lewin, 2.4 per cent. by Schrotter, 3.4 per cent. by McKenzie, 2.8 per cent. by Engelsted. These observations are not altogether unanimous, however, as some authors put the per cent. as high as 15. Its occurrence in the pharynx is given by these authors as 10 per cent., and in the nose as 2.8 per cent. The London Throat Hospital reports out of 10,000 cases of this disease, 308 affections