Purpura pigmentosa progressiva. acute episode with dense distribution of punctiform, red, non-push-off spots (bleeding). in addition, extensive brown coloration (hemosiderin deposition) in the area of the lower legs.
Melanoma, malignant, nodular, solitary, solid, sharply defined, surface smooth, non-hairy, black speckled, symptomless lump, growing for more than a year, foundduring routine examination (lump has always been there). Incident light microscopy revealed strong grey-blue streaks and massive pigment network break-ups.
Nevus melanocytic congenital differential diagnosis: Becker nevus: During puberty and postpubertal increasing hairiness of a nevus previously only visible as a brown spot. No symptoms. Typical for the Becker nevus is the "frayed" demarcation to normal skin.
Verruca seborrhoica. detail magnification: 10 x 7 mm, non-itching, greyish-brown, broad-based plaque with a verrucous, fissured surface. above the tumour there is an artificially caused erythema.
Paget, M., extramammary. detail magnification: Sharply defined, large-area, eroded, macerated, focal ulcerated, livid-reddish, non-itching, non-painful infiltrated erythema of vulva, perineum and perianal region of a 90-year-old female patient.
Myxoedema pretiabiales: circumscribed, blurred, yellowish-reddish, firm, hardly compressible, otherwise symptomless swellings; here a partial symptom of Graves' disease; typical is the orange peel-like surface of the swelling.
Dyskeratosis follicularis: Papules and dirty-brownish crusts of a zosteriform-striary dyskeratosis follicularis in the course of the blaschkolines in the upper abdomen and flanks in a 5-year-old girl.
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