Masi A, De Siena G M, Campolmi P, Bonan P, Vallecchi C, Ricupero L, Vanni L
Unità Operativa di Radiodiagnostica, Ospedale di Santa Maria Nuova, USL 10/A, Firenze.
Radiol Med. 1993 Jan-Feb;85(1-2):79-83.
Ultrasonography (US) was first used in dermatology in 1979. During the last few years, US has evolved thanks to technological progress and its use has been on the increase, in dermatology, to study both localized and diffuse skin diseases. In this paper, the authors review and compare the results obtained with a 20 MHz transducer with those obtained with 7.5 MHz and 10 MHz transducers in the study of skin alterations. Three parameters were considered: lesion identification, spatial evaluation and US structure. Fifty-eight cases of localized and 48 of diffuse skin diseases were examined. The localized forms were benign in nature in 18 patients (3 nevi, 2 seborrheic keratoses, 3 ulcus cruris cases, 6 sebaceous and 2 liquid cysts). The other 40 patients had malignant neoplastic lesions (16 epitheliomas, 13 primitive melanomas, 1 metastatic melanoma, 8 lymphomas and 2 Kaposi's sarcomas). The 48 cases of diffuse conditions included 27 systemic sclerosis, 18 psoriasis and 3 lichen planus cases. The comparative analysis of the results obtained using the different types of transducers in the study of localized dermatoses showed no differences in lesion identification and in the depiction of their US features. On the other hand, the 20 MHz transducer was much more accurate than the others as regards the spatial evaluation of the lesions measurable in millimeters, whereas it poorly demonstrated the lesions > 1.5 cm. However, only the 20 MHz transducer could demonstrate the US features of diffuse conditions.
超声检查（US）于1979年首次应用于皮肤科。在过去几年中，由于技术进步，超声检查得到了发展，其在皮肤科的应用也不断增加，用于研究局限性和弥漫性皮肤病。在本文中，作者回顾并比较了在皮肤病变研究中使用20MHz探头与7.5MHz和10MHz探头所获得的结果。考虑了三个参数：病变识别、空间评估和超声结构。检查了58例局限性皮肤病和48例弥漫性皮肤病。局限性皮肤病中，18例为良性病变（3例痣、2例脂溢性角化病、3例小腿溃疡、6例皮脂腺囊肿和2例液性囊肿）。另外40例患者患有恶性肿瘤性病变（16例上皮瘤、13例原发性黑色素瘤、1例转移性黑色素瘤、8例淋巴瘤和2例卡波西肉瘤）。48例弥漫性疾病包括27例系统性硬化症、18例银屑病和3例扁平苔藓。在局限性皮肤病研究中，使用不同类型探头获得的结果进行比较分析，在病变识别及其超声特征的描绘方面没有差异。另一方面，在对以毫米为单位可测量的病变进行空间评估时，20MHz探头比其他探头准确得多，而对于大于1.5cm的病变显示效果较差。然而，只有20MHz探头能够显示弥漫性疾病的超声特征。
