Necrobiosis lipoidica. necrobiosis lipoidica slowly "growing" for several years. large, rather discrete scarring in the centre. yellow-brownish plaque at the edges.
Reticulosis, pagetoid (disseminated type Ketron and Goodman): For several years slowly migrating, partly anular, partly garland-shaped, little itchy, brown-red, only minimally elevated, broadly margined plaques with parchment-like surface.
Erythema chronicum migrans. large plaque, which has been growing steadily on the periphery for about 8 months, only slightly increased in consistency, homogeneously brownish in the centre, somewhat atrophic, marked by an increasingly consistent erythema zone at the edges. only occasionally "slight pricking" in the lesional skin.
Lichen planus. chronically active, multiple, increasing, disseminated standing, partly confluent, first appearing about 6 months ago, mainly localized at the inner edge and back of the foot, 0.3-0.6 cm large, itchy, red, smooth, shiny papules in a 46-year-old woman. similar papules appeared on both inner wrist sides. Furthermore, a whitish, net-like pattern of the buccal mucosa of the mouth appeared.
Bowen's disease with transition to Bowen's carcinoma: solitary, size-progressive plaque that has been present for several years, occasionally accompanied by itching, sharply and arc-shaped, border-emphasized plaque with increasing verrucous nodular formation (see following figure).
Vasculitis, leukocytoclastic (non-IgA-associated). multiple, acute, symmetric, localized on both lower legs for 1 week, irregularly distributed, 0.1-0.2 cm large, sharply defined, symptomless, red, smooth patches (non-compressible). Occurrence after flu-like infection and ingestion of a non-steroidal anti-inflammatory.
Dimorphic leprosy of the lepromatous type: borderline leprosy of the lepromatous type with multiple, large, plate-like, borderline inflammatory lesions (type I leprosy reaction).
Lichen planus verrucosus: Plaques on the left lower leg that have been unchanged for years and are very itchy (see scratching effects), with a red-violet seam in the marginal parts of the plaques.
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