Usefulness of high‐frequency ultrasonography in the assessment of cutaneous lesions in children with hematologic malignancies

: High-frequency ultrasonography is a bedside tool increasingly used for the assessment of skin lesions, but there have been few reports about its importance in children with skin signs of hematologic disease. We present three cases to highlight the usefulness of high-frequency ultrasonography in assisting with the diagnosis of these skin lesions.