The arrangement of papules in prurigo nodularis Hyde along the cleavage lines of the skin, but not Blaschko's lines, supports the classification of prurigo nodularis Hyde as a traumatic chronic papulosis with cutaneous neural hyperplasia of xerodermal skin.
There is in photosensitive lupus erythematosus a strong association of high titers of anti-Ro(SS-A) antibodies in the serum of the patient with the development of special skin reactions depending on UV-light. The aim of our experiments was to detect a cytotoxic effect of anti-Ro(SS-A) antibodies and UVA-light on human endothelial cells in vitro (standard trypan blue exclusion test, SEM). After UVA-doses of 1 to 100 J/cm2, which were tested, and influence of serum containing anti-Ro(SS-A) antibodies (62 E, ELISA) membrane destructions of endothelial cells depending on the UVA-dose can be seen, irrespective of the fact whether the antibodies are present throughout the irradiation or added afterwards. This cytotoxic reaction depends on complement. A UVA-dose of 100 J/cm2 causes lethal damage of 40% of the cells. These results were confirmed by scanning electron microscopy.
Inpatients with progressive systemic scleroderma were submitted to ultrasound application several times every day. This type of ultrasonic therapy is practicable. Pain decreased in 18 of 24 patients. At the end of therapy, pain had not increased in any of the patients. The strength of the hands was significantly improved in all patients.
The UV-induced reaction of the epidermis is marked be extra- and intracellular edema and intraepidermal vesicles. Characteristical is the appearance of sunburn cells. In semithin section they can be differentiated in two cell types: "fried egg cells" prevail as early type in the exsudative phase (type I), "dark cells" as late type in the degenerative phase (type II) of the UV-reaction.
It is reported on a 41 years old man who suffered from dermatitis by contact with technical carbon and graphite products. In patch testing we found positive reactions to colophony, metallic copper and copper sulfate. By avoidance, of noxae the patient was free of symptoms.
Histochemical investigations were performed in normal and psoriatic epidermis to evaluate possible differences in the acrosyringial reactivity. Luminal (abundant in glycoconjugates, immunoreactive) and outer (almost nonreactive) epithelial cells could be distinguished. Psoriasis did not affect the staining pattern. The findings argue against a primary involvement of acrosyringial keratinocytes in the abnormal differentiation pathway of psoriatic epidermal cells. Moreover, they underline the relative independence of the acrosyringium from interfollicular epidermis.
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