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Treatment consists in administration of moderate to large doses of potassium iodide, and in the employment of antiseptic and parasiticide applications; usually, however, radical treatment, such as employed in lupus vulgaris, may be necessary.

The commonest form of lupus—lupus vulgaris—usually commences in childhood or youth, and is most often met with on the nose or cheek.

It is more than probable, moreover, that the cutaneous disease so long described as lupus vulgaris is simply a tubercular ulcer of the skin, and not a special disease of unknown causation.

It is to be distinguished from the tubercular syphiloderm and lupus vulgaris, diseases to which it may bear rough resemblance.

Upon what region is lupus vulgaris usually observed?