The usefulness of ultrasound imaging in digital and extradigital glomus tumors.

Recent years have witnessed an increase in the use of ultrasound imaging of the skin in the field of dermatology, as the technique reveals details of vessels and other structures that cannot be detected on physical examination. Extradigital glomus tumors are rarely seen in clinical practice and can pose a diagnostic challenge for dermatologists. We report on 4 patients with a clinical suspicion of extradigital glomus tumor and on 1 patient with a clinical suspicion of subungual glomus tumor. All 5 patients underwent ultrasound examination in B mode and color and pulsed-wave Doppler prior to surgical excision of the tumor and histologic examination, which confirmed the diagnosis in each case. Ultrasound imaging of the skin, combined with clinical findings, provided a simple, noninvasive way of making a prompt diagnosis and identifying the exact location of the lesion for surgical removal.