High-Frequency Ultrasound in Eccrine Poroma Diagnosis: A Retrospective Analysis of Distinctive Imaging Characteristics.

OBJECTIVES

This study aims to delineate the ultrasonographic characteristics of eccrine poroma (EP), using high-frequency ultrasound (HFUS) to facilitate non-invasive diagnosis and differentiation from other cutaneous lesions.

METHODS

Retrospective analysis of 15 patients with histopathologically confirmed EP who underwent preoperative HFUS examination (5-18 MHz) between January 2017 and May 2025. Systematic evaluation included morphological assessment, echogenicity characterization, compositional analysis, and vascular assessment using standardized Doppler grading.

RESULTS

This study enrolled 15 patients (mean age 56.60 ± 16.90 years) with solitary lesions ranging from 5.5 to 30.2 mm in diameter. Morphologically, 66.7% presented elliptical configurations, with 86.7% demonstrating well-defined margins. Ultrasonographically, 86.7% exhibited heterogeneous hypoechoic patterns with mixed solid-cystic architecture (cystic component <50%), while smaller lesions (13.3%) showed homogeneous hypoechoic characteristics. All cases demonstrated detectable vascular flow: Grade 3 vascularity in 60.0% and Grade 2 in 40.0%.

CONCLUSIONS

EP demonstrates consistent ultrasonographic features including heterogeneous hypoechoic architecture, well-defined margins, predominantly solid-cystic composition, and robust vascular perfusion. These findings provide the first comprehensive characterization of EP's imaging features, establishing a foundation for integrating HFUS into diagnostic algorithms and enhancing pre-operative assessment accuracy.