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.