High-frequency ultrasonography a new quantitative method in evaluation of skin lymphomas-First comparative study in relation to histopathology.

Abstract

High-frequency ultrasonography (HF-USG) is a noninvasive method used in evaluation of depth and width of skin neoplasms. Recent data suggest that this method may also supplement objective clinical assessment in skin lymphomas, especially in mycosis fungoides, where subepidermal low echogenic band (SLEB) can be observed. The aim of the study was to present characteristic ultrasonic picture of MF in relation to histopathologic findings. Ten patients diagnosed as MF were included in the study. The USG examination was performed with the use of 20MHz transducer within representative plaque. From the scanning lesion, the skin biopsy was taken. The relationship between histopathologic infiltrate with clonal T cells and USG image was investigated. In all analyzed sonograms obtained from lesional skin of early-stage MF, we could detect the presence of subepidermal low echogenic band (SLEB). We detected strong correlations between SLEB thickness and the thickness of subepidermal infiltration (0.994, P<0.05). Subepidermal low echogenic band is a typical sign of infiltrative stage of MF, and its thickness may depend on the type of skin lesion. HF-USG may be a reliable noninvasive method of quantitive assessments in MF, which corresponds to the thickness on T-cell infiltration in histopathology.