Papillomatosis confluens et reticularis. confluent, brownish hyperpigmented papules in the neck region of a 31-year-old patient, existing for several years, blurred, flatly elevated, consistency-multiplied papules. velvety sensation on palpation. histologically there is acanthosis with distinct papillomatosis and strong plexus-like orthohyperkeratosis. PAS staining negative.
Papillomatosis confluens et reticularis: Patchy and flat, velvety yellow-brown plaques (harmless finding) in the sternoclavicular region and in the region of the upper abdomen.
Lupus erythematosus, subacute-cutaneous. detail magnification: Multiple, solitary or confluent, small spots to large areas, sharply defined, anular and gyrated erythema of neck and face of a 68-year-old female patient, partly covered with yellowish crusts.
Mycosis fungoides, detail enlargement: Coin-sized oval plaques with atrophic surface and parchment-like folding on the lower leg of a 70-year-old female patient.
Dyshidrotic dermatitis: chronic recurrent hyperkeratotic dermatitis of the hands and feet. recurrent episodes with itchy blisters. no signs of atopy. no contact allergy
Bowen's disease: solitary, chronically dynamic, slowly and continuously growing for 14 months, asymptomatic, sharply defined, approx. 1.5 x 1.0 cm large, scaly, rough plaque on the prepuce of a 71-year-old man
tinea faciei. itchy and moderately painful, livid-reddish, rough, scaly plaque with intact or burst pustules on the surface. on pressure discharge of pus. patient has received 15mg methotrexate p.o. for several years because of polyarthritis. the present finding can also be called granuloma trichophyticum (majocchi).
Psorisis, plaque type: chronic relapsing-active psoriasis with larger, in places confluent plaques, as well as smaller fresh papules and plaques. Largely symmetrical infestation pattern.
Microsphere. 2 weeks of persistent, size progressive, itchy plaques measuring 2.5 x 2.5 cm as well as 1.5 x 1 cm with distinct scaling, edge accentuation and central pallor in an 11-year-old boy. The skin lesions developed from 2 small papules which appeared for the first time about 2 weeks before.
Naevus verrucosus Chronic stationary (existing since birth), 0.1-0.3 cm in size, arranged in a line pattern, firm, brown, rough papules, which are aggregated in the centre to a linear plaque Typical example of a linear cutaneous mosaic!
Lichen sclerosus of the penis: several discrete, veil-like, little sharply defined, whitish spots and plaques; dysesthetic discomfort during sexual intercourse.
Lichen planus. chronic progressive form (present in this form for about 1 year). plaque-shaped hyperkeratosis in LP palmoplantaris. the flat, yellowish hyperkeratotic plaque is lined by reddish-livid papules. the diagnosis LP is only possible at the roundish papules in the marginal area.
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