Acanthosis nigricans (benigna): generalized clinical picture with pigmented, blurred, symptomless plaques in the axillae, genital area and inguinal regions.
Pityriasis lichenoides chronica: a clinical picture with multiple, inflammatory, scaly, excoriated papules that has been present for months and is accompanied by considerable itching; cause unknown.
Interstitial granulomatous dermatitis with plaques. 10 months ago, erythematous plaques, initially europiece-sized, appeared for the first time, later on size progressive and confluent skin lesions on the left mamma in a 38-year-old female patient. In the lower outer as well as in the upper outer quadrant of the mamma discrete, bizarrely configured, reddish-brown plaques and multiple telangiectasias are visible.
Angiokeratoma corporis diffusum, reflected light microscopy (focus in the navel region of a 41-year-old woman): Subepidermal, irregularly configured, finger-shaped branched red lacunae.
Several acquired melanocytic nevi in a 65 years old man. Especially the two conspicuous large melanocytic nevi did not show any changes in the last years. There is no need for surgical removal. Annual clinical controls are necessary.
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