Contact dermatitis toxic: exogenous, toxic, acute reddening of the hairy scalp, limited to the site of exposure of the applied "hair growth agent"; secondary findings are alopecia androgenetica.
Keratosis actinica, keratotic type: extensive "field carcinization" of the scalp, beginning transformation into an invasive, spinocellular carcinoma (here detailed picture).
Psoriasis capitis: diffuse reddening of the entire capillitium with coarse lamellar scaling. Here in a 42-year-old patient with extensive psoriasis of the entire integument. Typically, the changes exceed the forehead-hairline.
Tufted hairs:Folliculitis decalvans: Scar plate with wicklike tufts of hair in the centre, also in the marginal area of the scarring (see also under Folliculitis decalvans).
Basal cell carcinoma, nodular. centrally ulcerated, nonpainful ulcerated nodule in the region of the temple. ulcer not painful. characteristic for the diagnosis "basal cell carcinoma" is the raised, reflecting wall of the "ulcer" and the bizarre vessels.
psoriasis capitis: chronically inpatient red plaques extending over the entire hairy scalp. no significant scaling (caused by pre-treatment). occasional itching. apparently diffuse hair loss
Squamous cell carcinoma of the skin: approx. 3 cm in diameter, coarse, crusty, exuding tumour with an inflammatory reddening of the edges in the area of the neck of a 95-year-old female patient, which empties purulent secretion under pressure.
Atheroma Solitary, chronically stationary, sharply defined, approx. 3.0 x 1.5 cm, bulging elastic, largely hairless tumor in the area of the capillitium; no detectable central porus.
Culicosis. disseminated, irregularly configured, intensely itchy, intensely red, urticarial papules and papulo vesicles, appeared about 3-4 hours after an insect bite. the skin symptoms can persist for "weeks", itching!
Keratosis actinica erythematous type: multiple red, rough, slightly painful papules and plaques on the bald head when stroking over them, continuously existing for years.
Tinea capitis profunda: Inflammatory, moderately itchy, slightly painful, fluctuating nodule in the area of the capillitium in children with extensive loss of hair.
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