Melanonychia striata longitudinalis. solitary, chronically stationary, approx. 1.2 cm long, acral accentuated, linear, sharply defined, brown longitudinal stripe on the right thumb of a 6-year-old boy. No nail fold alteration so far.
Melanonychia striata longitudinalis (detailed picture): approx. 0.4 cm wide, dark brown strip of the nail; nail fold with distinct paraungual rim; especially malignant melanoma of the nail root.
Dennie-Morgan infraorbital fold: Double eyelid crease on the lower lid as well as a rarefication of the lateral eyebrows (Hertoghe's sign: positive) in a 4-year-old boy with atopic eczema.
keratoakanthoma, classic type. short term, grown within 4 weeks, approx. 1.5 cm in diameter, hard, reddish, centrally dented, strongly keratinized lump. no symptoms. diagnosed as "pimples".
DD. acrolentiginous malignant melanoma: in this case nail hematoma . 6 weeks old (trauma recall), sharp blue-black discoloration of the big toe nail (marked by arrows and line) with discoloration of the epinychium (circle). arrow (right) indicates a streaky (still red) apparently fresh bleeding.
Cheilitis actinica chronica: extensive veil-like leukoplakia of the red of the lip; on the left third of the lower lip development of a squamous cell carcinoma.
Chronic light damage: poikiloderma after years of excessive UV exposure, including hyperpigmentation, depigmentation and numerous precanceroses of the actinic keratosis type.
Kaposi's sarcoma epidemic (overview): HIV-associated Kaposi's sarcoma with disseminated, bizarrely configured, reddish-brown plaques, sometimes in a striped arrangement.
Melanoma, malignant, lentigo-maligna melanoma. deep black, irregularly limited, asymmetrical plaque in the facial region. on the right medial side an almost skin-coloured verruca seborrhoica.
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