Basic Studies on Subepidermal Hypoechogenic Band in Ultrasonic Imaging.
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概要
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Subepidermal hypoechogenic band (SEHOEB) appearing in ultrasonic imaging is evidenced to be amyloid deposits or elastin degeneration. However, it is sometimes found in young healthy adults, and tends to be more hypoechogenic in the afternoon, although no significant changes are found in thickness. Thus, the presence of SEHOEB in young adults is considered to be caused by lymph stasis of the skin. An attempt to make it sure was done in seven apparently healthy young women. Intradermal injections of 0.02ml each of distilled water and physiological saline solution were carried out in three female volunteers. Those of 0.02ml each of eggwhite allergen, serum as is and 10 fold diluted aqueous serum which was taken from her child with atopic dermatitis were performed for Prausnitz-Kustner's test. Ultrasonic imaging with Dermascan C (Cortex Technology, Denmark), using B-type probe, were taken three times, before, immediately after injections and 30 minutes later at the injected sites in every case. SEHOEB was found 30 minutes after injections of distilled water, serum and positive reactions to eggwhite allergen, while no SEHOEB at injected sites of physiological saline solution and negative reactions to eggwhite allergen. In addition, ultrasonic imaging of urticaria revealed many hypoechogenic spots throughout the dermis in a patient with chronic urticaria.<BR>From these results obtained. It is concluded that SEHOEB seen in young adult must be lymph stasis of the dermis.
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