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Fig 1. “Digitus Coeruleus” - “Blue finger”. Analogous to “club finger”, or clubbing of the fingernails, which often ends up with a blue tint at the end of the fingers. Many times clubbing develops in response to inadequate oxygenation of the blood, where there is either a problem in the heart or in the lungs (including the formerly ubiquitous TB), so the blue tint is not unexpected.
Fig 2. Onychomycosis - Fungal nail infection, often characterized by thickened, yellow, crumbly nails.
Fig 3. Onychia maligna - Severe inflammation and ulceration of the matrix and soft parts of the nail bed, accompanied by oozing lymph, purple-red hue surrounding ulcer, nail loss, and pain. Caused by mild trauma in debilitated or immunocompromised patients. Finger becomes bulbous and deformed if not treated. Was known to be caused by strumous or cachetic habits of the insane.
Fig 4. Onychia maligna - Similar to above, longer duration. Bulbous deformation of finger evident.
Fig 5. Arthritis urica Gichtknoten an Finger und Ellenbogen - Gouty arthritis, with gouty deposits in the fingers and elbow. Wow, is that ever some gout.
Die Chiurgischen Krankheiten der Oberen Extremitatan. Paul Vogt, 1881.
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Fig 1. Dactylitis syphilitica - Look, just don’t get syphilis, ok? It hates your entire body, not just your genitals.
Fig 2. Digitale angiome - A benign tumor of the blood vessels or lymphatic system (most likely of the blood vessels), found on the finger.
Fig 3. Digitale angiome - Same as above, with multiple growths forming nearby one another.
Fig 4. Congenitale diffuse Angiektasie der oberen Extremitaten - Diffuse congenital dilation of the blood vessels of the upper extremities. This is often caused by poor valves within the veins that keep the blood flowing back toward the heart, leading to pooling of blood and expansion of the vessels. It’s the same as secondary varicose veins, but is present from birth, and is often more extensive.
Die Chiurgischen Krankheiten der Oberen Extremitatan. Paul Vogt, 1881.
