Melanoma, malignant, acrolentiginous. 6 years of persistent, size progressive, approx. 1.8 x 1.6 cm large, darkly pigmented, flat plaque on the palmar side of the distal phalanx of the index finger in a 73-year-old man. Focal central ulceration with scabbed overlay. The borderline is blurred, an irregular and blurred demarcation to the surrounding skin tissue is visible.
erythema induratum. solitary, chronically stationary, 4.0 x 3.0 cm in size, only imperceptibly growing, firm, moderately painful, reddish-brown, flatly raised, rough, scaly nodules with a deep-seated part (iceberg phenomenon). intermediate painful ulcer formation (Fig). no evidence of mycobacteriosis.
Chronic sun damage of the skin: Dry, coarse-fielded, atrophic skin with solar lentigines and non-pigmented precancerous lesions of the actinic keratosis type.
Granuloma anulare disseminatum: Partial manifestation on the back of the right hand. Non-painful, non-itching, disseminated, extensive plaques that appeared on the trunk and extremities of a 65-year-old patient. No diabetes mellitus. No other systemic diseases known.
Dyskeratosis follicularis: General view: chronically dynamic, on the back localized, partly disseminated, but mostly flat arranged, dirty brown, flatly elevated, very itchy papules and plaques in a 43-year-old patient.
Lipogranulomatosis subcutanea: Pressure pain-sensitive, subcutaneously situated, walnut-sized nodules with livid discoloration and superficial skin peeling on the inner side of the lower leg in a 59-year-old woman.
Leishmaniasis, cutaneous. solitary, chronically dynamic, since 6 months slowly growing, 1.5 x 2.0 cm in size, firm, slightly scaly, brown, rough, flatly elevated lump with central ulceration. anamnestic journey to an endemic area (vacation in Mexico).
Usual melanocytic nevus. Brownish, roundish, 0.3 cm in diameter, sharply defined, soft, asymptomatic, smooth papule in the region of the right areola of a 26-year-old woman. No size growth in recent years.
Lichen planus actinicus: anular smaller lesions and merged into larger map-like borderline plaques; in the prominent borderline area the violet shade of Lichen ruber is found.
Nevus, melanocytic type: Dysplastic melanoytic nevus, growth in the last 6 months, asymmetry of the tumor and the different coloration should in this case lead to an excision and histopathological examination to exclude malignancy (malignant melanoma).
Syphilis Early syphilis: papular , in places psoriasiform scaling, chronic exanthema. Fading erythema is also found in places. Generalized lymphadenopathy.
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