Point-of-Care Ultrasound Use to Differentiate Hematoma and Sarcoma of the Thigh in the Pediatric Emergency DepartmentLe, Cathie-Kim; Harvey, Gregory FRCPC; McLean, Lianne FRCPC; Fischer, Jason FACEPSection Editor(s): Marin, Jennifer R. MD, MSc Pediatric Emergency Care: February 2017 - Volume 33 - Issue 2 - p 135–136 doi: 10.1097/PEC.0000000000001025 Ultrasound Case Reviews Buy Abstract Author InformationAuthors Article MetricsMetrics Hematomas and soft tissue sarcomas can be difficult to differentiate clinically, even with the addition of traditional imaging modalities. There are several case reports of sarcomas being misdiagnosed as hematomas, most commonly with a history of mild trauma. In this case report, we described a sarcoma initially misinterpreted as a hematoma on ultrasound. Key clinical features and sonographic findings that may assist clinicians using point-of-care ultrasound to correctly differentiate sarcomas from hematomas are reviewed. A soft tissue mass larger than 5 cm, with internal vascular Doppler flow, presenting without a clear mechanism of injury or with constitutional symptoms should be considered as suspicious for malignancy. From the *McGill University Medical School, Montreal; and †Division of Pediatric Emergency Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada. Disclosure: The authors declare no conflict of interest. Reprints: Gregory Harvey, FRCPC, Division of Pediatric Emergency Medicine, The Hospital for Sick Children, 12th floor, 525 University Ave, M5G 2L3, Toronto, Ontario, Canada (e-mail: email@example.com). Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.