Clinical usefulness of variable-frequency ultrasound in localized lesions of the skin.
BACKGROUND
High variable-frequency ultrasound is a recently available technique capable of clearly defining skin layers and deeper structures that also provides local perfusion patterns obtained in real time.


OBJECTIVE
The aim of the study was to assess the performance of variable-frequency ultrasound in the evaluation of skin lesions.


METHODS
We performed a retrospective study of 4338 skin ultrasound examinations in predominantly localized skin lesions, and in a group of 130 healthy controls. We determined ultrasound sensitivity, specificity, and statistical level of certainty, and compared ultrasound diagnoses with clinical diagnoses.


RESULTS
Referring diagnosis was correct in 73% of the lesions, and addition of ultrasound increased correctness to 97% (P < .001 for the difference). Ultrasound overall sensitivity was 99%, specificity was 100%, and statistical diagnostic certainty was 99%


CONCLUSIONS
Ultrasound in its current version cannot detect lesions that are epidermal only or that measure less than 0.1 mm in depth.


CONCLUSIONS
Ultrasound is a reliable adjuvant for the accurate and precise diagnosis of skin lesions.
Wortsman
Ximena
X
Department of Radiology, Clinica Servet, Santiago, Chile. xwo@tie.cl
Wortsman
Jacobo
J
D000328:Adult; D002280:Basal Cell Carcinoma / Q000000981:diagnostic imaging; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D005547:Foreign Bodies / Q000000981:diagnostic imaging; D006391:Hemangioma / Q000000981:diagnostic imaging; D018219:Histiocytoma, Benign Fibrous / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008545:Melanoma / Q000000981:diagnostic imaging; D008875:Middle Aged; D009262:Nails / Q000000981:diagnostic imaging; D010864:Pilonidal Sinus / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D012867:Skin / Q000000981:diagnostic imaging* / Q000473:pathology; D012871:Skin Diseases / Q000000981:diagnostic imaging*; D012878:Skin Neoplasms / Q000000981:diagnostic imaging; D018615:Ultrasonography, Doppler, Color; D014860:Warts / Q000000981:diagnostic imaging