Secondary syphillitic ulcers on other portions of the external skin:

-JAHR Georg Heinrich Gottlieb

Among these we mention, as first in rank, the syphilitic rhagades between the toes, which are almost always overlooked, although they are scarcely ever unaccompanied by other secondary syphilitic phenomena, principally affections of the throat. Always in a state of ulceration, they resemble pretty accurately the rhagades at the anus; they are somewhat raised, oblong, deep, and of a violet-red; at the same time they incline to spread towards the balls of the feet, and may render walking very troublesome and painful. They may likewise show themselves in the shape of cracks around the rounded borders of the nails, where they secrete, like the former rhagades, a purulent, ichorous, very fetid serum.
On the mammæ, on the contrary, truly secondary ulcers are very rare; most of these ulcers, which are principally seen on the mammæ of nursing women in the shape of mucous tubercles are undoubtedly caused by infection communicated by syphilitic infants; they do, however, exist on the mammæ of other women, in which case they are always accompanied by syphilitic phenomena on the skin, or mucous membranes.
Such chancres have likewise been perceived on the umbilicus, where they generally commence with a more or less livid redness, deep in the tissues of the umbilicus. This redness is succeeded by an ulceration that very soon assumes all the characteristic appearances of chancre. In most cases, these ulcers are likewise attended with other symptoms of constitutional syphilis.

Syphillitic ulcers on knee

Ulcers breaking out on the eyelids (where figwarts may likewise become located) are sometimes perhaps of a primary nature, and are caused by contract with the fingers, to which some of the syphilitic matter was adhering; nevertheless they are more frequently secondary than primary ulcers. If secondary, they generally break out on the free margin of the eyelids, very soon spreading over their outer or inner surface, if not over both at one and the same time; they are most generally accompanied by violent inflammation, in which the conjunctiva becomes involved. After healing, they generally leave irregular cicatrices behind, resembling those after burns; and not unfrequently they cause a falling out of the eyelashes, which, in such a case, never grow again.

Such ulcers may likewise break out on the ears, where they usually become seated on the posterior or anterior surface of the concha, or even in the outer meatus auditorius. If seated between the ear and the mastoid process, they generally resemble oblong rhagades; whereas, if located on other parts, they look more like slimy tubercles and hepatic excoriations, but are always of difficult recognition, unless other syphilitic signs are simultaneously present. Some of these ulcers likewise assume the form of deep phagedænic ulcers, with abrupt edges a lardaceous and uneven base, occasionally exhibiting red and bleeding spots, or covering themselves with a scurf. If phagedænic, they may penetrate deep into the internal meatus, destroy the ossicula, and in this manner, cause an incurable deafness. In most cases of such deeply-penetrating ulcers, nothing, fortunately, remains but a buzzing in the ears, which will, however, bid defiance to all the remedial agents that are employed against it.