Pachyonychia congenita: congenital nail dystrophy affecting all finger and toe nails with palmoplantar keratoses: shown here are claw-shaped, thickened and bent toenails.
Onychodystrophia psoriatica. moderate onychodystrophy of the index finger nail of a 30-year-old man. the nail matrix is distally crumbly and chipped off. isolated splinter hemorrhages are visible. almost centrally a small yellowish oil stain shimmers through. hyperkeratotic nail fold.
Keratosis palmoplantaris papulosa seu maculosa. since childhood persistent, chronically stationary, strong keratinization of the planta pedum with multiple, few millimeters large, wart-like horny cones with rough, scaly surface. central rejection with funnel-shaped defect.
xanthelasma: the skin lesions developed gradually over the past 3-4 years. several, soft, yellow, fielded elevations with a smooth surface. no subjective symptoms. no hypertriglyceridemia detectable (E78.1)
Lichen nitidus. chronic stationary, partly grouped, also linearly arranged (Koebner phenomenon), non-itching, non follicular, 0.1 cm large, white, smooth, round papules in a 32-year-old male.
Pseudoxanthoma elasticum: Unusual infestation of the lip mucosa with symptomless, yellowish-white deposits, which correspond to the elastotic collagen changes of the mucosa.
Keratosis palmoplantaris diffusa circumscripta: Thick, waxy, yellowish, plate-like corneal layer, which is sharply separated from the field skin by a red stripe; in the lower right part of the picture the waxy corneal plate had detached a few days ago.
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