Linea fusca. sharply defined, linear, brown, smooth, non-pruritic hyperpigmentation in a 28-year-old pregnant woman in 24th week of pregnancy. the line runs from the symphysis pubica upwards to the epigastrium. the clinical picture is diagnostically conclusive.
Striae cutis distensae: Fresh (red), symmetrical striae after many years of internal and local (steroid inhalation) therapy with glucocorticoids for bronchial asthma.
Urticaria pigmentosa: general view: about 0.5-1.0cm large, disseminated, oval or round, brownish-red spots. only when rubbed, increased redness of the spots with accompanying itching. also in warm showers or baths increased redness and clearly palpable elevation of the lesions.
Addison's disease: homogeneous hyperpigmentation of the back in a 35-year-old man; especially accentuated on the lateral parts of the back and in the lumbar region. The patient made a statement typical for Addison's disease: "Last summer's suntan did not recede as usual" The transverse light stripes of the lumbar region correspond in appearance to striae cutis distensae.
Lentigo maligna: a slow-growing, completely symptom-free spot that has been known for years; histologically, no invasiveness (transition to lentigo maligna melanoma) could be detected even in cut series.
Urticaria pigmentosa (overview): Adult form of Urticaira pigmentosa (erythroderma), with a history of many years, continuous increase in the density of spots, course over 7 years.
Pityriasis versicolor alba. 17-year-old female patient who noticed these white patches after a summer vacation, which became more pronounced as the tan increased. Disseminately distributed (non-symmetrical), 0.2-0.4 cm large, roundish white patches confluent to larger areas (right side of the thorax). The spatter-like distribution pattern is typical for pityriasis versicolor.
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