Dermatofibrosarcoma protuberans: Solitary, continuously growing for 4-5 years, difficult to delimit to the side and depth, woody solid, smooth, bumpy, red knot.
Pyoderma gangraenosum. chronic progressive, painful, large-area, blue-reddish, slightly raised, approx. 5 x 4 cm large, ulcerated plaque with painful marginal zone and dark red-livid rim on the lower leg of a 36-year-old female patient with ulcerative colitis. on pressure emptying of pus and blood.
Ulcus cruris arteriosum: very painful ulcer that has existed for about 1 year, is extremely resistant to therapy, sharply defined, as if punched out, and is known to have a history of smoking with PAVK.
Myxoedema pretiabiales: circumscribed, blurred, yellowish-reddish, firm, hardly compressible, otherwise symptomless swellings; here a partial symptom of Graves' disease; typical is the orange peel-like surface of the swelling.
eczema, dyshidrotic: detailed picture with inensively itching intraepithelial vesicles, circumscribed scaling and brownish felts (healed efflorescences). no signs of atopy. no contact allergy.
Knotig polypoides collagenoma, (solitary, nodular non-pigmented lesion). Dermatoscopy: Radially arranged, tortuous and partially branched vessels with white structureless area and white plaques. DD: Knotig basalioma, pilomatrixoma, sebaceous gland hyperplasia.
Lichen simplex chronicus: approx. 18x12cm large, itchy plaque with rough surface left lower leg of a 25-year-old female patient. in the loosened marginal area the primary papular structure of the lesion is visible. DD: Lichen amyloidosus.
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