Use of Non-contact Dermatoscopy in the Diagnosis of Scabies
摘要
From the Department of Dermatology, Cathay General Hospital Accepted for publication: February 17, 2008 Reprint requests: Che-Hao Hsu, Department of Dermatology, Cathay General Hospital, 280 Jen-Ai Rd. Sec. 4, Taipei, Taiwan TEL: 886-2-27082121 ext. 5078 FAX: 886-2-27074949 E-mail: bill045@ms4.hinet.net CASE REPORT A 15-year-old girl came to our outpatient clinic due to many itchy vesicles and papules on her bilateral palms for several years. She visited other hospital and was treated as hand eczema prior to this visit. Physical examination showed multiple, 0.3 to 0.5 cm, mild scaly, erythematous papules and deepseated vesicles on her bilateral palms (Fig. 1). There was also one serpiginous, whitish to grayish, threadlike elevated line ( burrow) 2.5 cm in length on her left palm. Under handheld dermatoscope (Dermlite® II PRO HR) (Fig. 2), there was one grayish triangular shaped lesion with a black dot in the apex (resembling circumflex accent, eg. in French letter “O” ) seen at the top of the whitish, threadlike elevation (Fig. 3). Skin scraping was then obtained over the triangular area with a sterile surgical blade and examined in potassium hydroxide solution at 100X magnification, in order to confirm the diagnosis of scabies. Mite and eggs were noted (Fig. 4).