Dermatosis, acute febrile neutrophils (Sweet Syndrome): suddenly appearing inflammatory, succulent, livid red papules that have conflued into larger and plaques, combined with fever and feeling of illness.
Amyloidosis cutis nodularis atrophicans: Solitary, soft, brownish-yellowish nodule on the nostril (histologically confirmed as amyloidosis cutis) in a 27-year-old man without clinically detectable systemic amyloidosis.
Psoriasis palmaris et plantaris: dry keratotic plaque type. Pretreated psoriasis plantaris: typical pattern of infection with flat, sharply defined red plaques with and without scaly deposits.
Glomus tumor. reflected light microscopy: Livid striped vascular drawing below the nail plate in the area of the lunula and the eponychium. in this area a punctual, strong pressure pain can be induced.
Squamous cell carcinoma of the skin: 1.5 cm large, spherical, red node (tumor) with ulcerated surface and hemorrhagic crust on the forehead of a 67-year-old female patient.
Hand-foot-mouth disease: numerous, acute, painful, polygonal vesicles with a red courtyard; unspecific flu-like prodromas lasting about 2 weeks before.
Dermatitis perioralis. periorally localized, large red spots, smallest follicular vesicles and papules. perioral dermatitis is characterized by an inflammation-free zone immediately adjacent to the red of the lips. 21-year-old woman with several months of therapy with an extemporaneous formulation containing glucorticoids.
Erythema gyratum repens. chronic dynamic (changeable course for several months), linear, symptom-free, red, rough, slightly elevated linear plaques due to confluence and peripheral growth, which convey a grained overall aspect.
Cutaneous mosaic dermatosis: In a 7-year-old girl erythematosquamous, hyperkeratotic papules and plaques exist in a linear and planar arrangement since birth.
Eczema, atopic. 18-year-old female patient with recurrent retroauricular, strongly itchy, reddish, scaly patches, plaques and rhagades for several years. Multiple immediate type sensitizations exist in case of a positive family history.
tinea pedis "moccasin type": little inflammatory mycosis of the foot. arrows indicate the proximal extensions of the mycosis on the back of the foot. the encircled scaling is also induced by mycosis.
Erythromelalgia. seizure-like, very painful, hyperemic, reddened and swollen skin of the hands and feet with increased sensitivity to heat. improvement of symptoms by cooling under running water.
Adnexal carcinoma, microcystic. skin colour to yellowish, rough plaque, difficult to delimit, with superficial telangiectasia and atrophic, shiny surface.
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