Renal function should be carefully followed during the treatment of AN patients with a long duration of illness, especially those with long-term laxative abuse.
The effectiveness of commercially available, chemically generated, topical exothermic pads that elevate skin surface temperature from 42 to 43 degrees C was stressed in 22 patients with psoriasis. Control sites were treated with conventional modalities such as Goeckerman's regimen, as well as with occlusion with nonexothermic pads. Skin lesions in 19 patients disappeared after the use of hyperthermia. The average time required for complete regression in the treated areas was 27 days with hyperthermia, compared with 44 days with Goeckerman's regimen. There were no hyperthermic side effects. Seventeen patients whose skin lesions disappeared with the use of both hyperthermia and Goeckerman's regimen were subsequently reexamined. The hyperthermia produced an equal or longer duration of remission than did Goeckerman's regimen.
Surface morphology of pericytes of the subepidermal capillary network of rat skin was studied by scanning electron microscopy. Pericytes showed considerable variation in shape, one end of the spectrum representing a fusiform cell body and lateral projections, the other end a club-like, undulated appearance. Most cells of whatever form were disposed parallel to the capillary course and aligned on the dermal side of the vessels. The pericytic processes encompassed up to half of the endothelial circumference, and were not tapered but spatulated at the ends; the cells adhered to the vessel wall only in certain areas. These findings, together with our previous observation that the subepidermal capillaries exhibit fenestrations mainly at the epidermal side of the endothelial lining, suggest a possible functional role of the pericyte in control of material exchange through the vessel wall. The lateral processes of the fusiform pericytes may, by contraction, cause thinning of the capillary endothelium and the formation of fenestrae, while the club-like pericytes may straighten and push the capillary towards the epidermis, if pericytes are indeed contractile cells, as recent studies indicate.
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