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).
melanoma malignes amelanotic: since early childhood a pigment mark is known at this site. continuous growth for several years. for half a year extensive ulceration of the node. no significant symptoms.
Erythema nodosum. red plaques and deep nodular formation, which have been present for several days and are highly painful and have a blurred border; this was preceded by an unclassified, highly febrile viral bronchial infection and the intake of ibuprofen as an analgesic.
Dermatofibrosarcoma protuberans: Solitary, continuously growing for 4-5 years, difficult to delimit to the side and depth, woody solid, smooth, bumpy, red knot.
Collagenosis, reactive perforating. 12-month-old female patient: Red, solitary, partly confluent, itchy, coarse papules with hyperkeratotic clot on the right lower leg of an 80-year-old female patient.
Carcinoma cuniculatum: Advanced verrucous carcinoma of the sole of the foot (here heel region), which has existed in its early stages for >2 years. No significant pain symptoms. No regional lymph node metastases detectable.
Ulcerated squamous cell carcinoma: cauliflower-like, firm, less pain-sensitive, eroded and ulcerated, weeping nodule, which has been present for > 1 year and is constantly enlarging.
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