Bowen's disease: chronically stationary, slowly increasing in area and thickness, sharply defined, now clearly (knot formation), symptom-free, red, rough, sometimes scaly and crusty plaque on the palm of the hand.
Dyskeratosis follicularis: Infestation of the palms of the hands; in central areas of the palm flat, common keratoses, at the ball of the thumb about 0.1-0.2 cm large, glassy papules.
Acrodermatitis continua suppurativa: for years a chronic recurrent clinical picture with painful pustules, nail destruction with formation of erosive areas
Congenital melanocytic nevus. brown, soft, papillomatous plaque sharply demarcated from the surrounding normal skin. no change in colour or shape has been detected so far apart from the "physiological" size growth.
Pigmented spindle cell tumor, nevus reed: dark brown to black pigmented plaque, preferably located on the lower leg. The lesion is usually excised under the suspected diagnosis of melanoma. Illustration from the collection of Dr. Michael Hambardzumyan.
Erythema anulare centrifugum: characteristic (fresh) lesions with peripherally progressive plaques, which are peripherally palpable as well limited (like a wet wolfaden) Histological clarification necessary.
Keratosis palmoplantaris diffusa circumscripta: Thick, waxy, yellowish, plate-like horny layer that covers the entire palm of the hand and also the sole of the foot; the mobility of the hands is restricted.
Infant hemangioma. scrotal and perineal hemangioma and aggregated papules in a 2-month-old boy. From day 6-7 after birth red spots appeared at first on the scrotum, which then increased in size and spread to the anus.
Parapsorisis en petites plaques: completely symptom-free red (hardly palpable), slightly scaly plaques; recurrent course for years; improvement in the summer months or under UV therapy.
lupus erythematosus acute-cutaneous: clinical picture known for several years, occurring within 14 days, at the time of admission still with intermittent course. anular pattern. in the current intermittent phase fatigue and exhaustion. ANA 1:160; anti-Ro/SSA antibodies positive. DIF: LE - typical.
Leprosy. leprosy lepromatosa (-LL-): disease pattern with papules and nodules in diffuse distribution that has been continuously developing for many years; loss of eyebrows, partial loss of eyelashes (Alopecia lepromatosa)
psoriasis guttata. small, exanthematic form of psoriasis after streptococcal infection. only slight scaling (due to pre-treatment). note the indicated linear patterns (koebner phenomenon). the auspitz phenomenon (finest punctiform bleeding after removal of the uppermost scaly layer with a wooden spatula) can still be triggered even in these pre-treated lesions and is therefore an excellent diagnostic sign (best triggered in the small papules).
psoriasis seborrhoeic type: recurrent, location-constant and therapy-resistant "seborrhiasis" for several years. no evidence of atopic diseases. circumscript infestation of eyebrows, eyelids and cheeks.
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