en تومور Tumor surgery گزارش مورد Case Report <div style="text-align: justify;"><strong>Background</strong>: Extraskeletal Ewing&rsquo;s sarcoma (EES), described in 1969 by Tefft et al., is an extremely uncommon collection of highly malignant cells that typically manifests in pediatrics and adolescents, with most cases ranging between 10 and 20 years old. Patients usually present with swelling and localized pain associated with a rapidly growing mass.<br> <strong>Case Presentation</strong>: This study aimed to report a case of EES of the foot in a 4-year-old Iranian boy, who was admitted with pain and a wart-like lesion on the plantar surface of his left foot over the past 4 months. Magnetic resonance imaging (MRI) revealed a subcutaneous soft tissue mass in the area between the first and second toes, extending from the plantar surface to the dorsal aspect of the foot. The core-needle biopsy results were indicative of EES. A tourniquet was applied to the proximal part of the lower extremity during surgery. After the surgery and subsequent histology evaluation, EES was confirmed.<br> <strong>Conclusion</strong>: Although EES is an uncommon entity, it is important to consider this tumor in the differential diagnosis of skin subcutaneous lesions, especially in younger individuals and if there is a visible cutaneous lesion. These tumors are sometimes clinically misdiagnosed because they resemble other cutaneous cancers on examination. Given the rarity of EES, there is no standard and definite guideline for management, and EES requires multidisciplinary care in order to achieve the best outcomes in management.&nbsp;</div> Extraskeletal Ewing’s sarcoma (EES), Pediatrics, Bone tumor 91 96 http://jros.iums.ac.ir/browse.php?a_code=A-10-1606-3&slc_lang=en&sid=1 Khalil Kargar Shooroki khalilkargar63@gmail.com 10031947532846008566 10031947532846008566 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Sam Hajialiloo Sami saamhaji@gmail.com 10031947532846008567 10031947532846008567 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Amin HamidzadehKhiavi drahkh2000@gmail.com 10031947532846008568 10031947532846008568 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Behnam Sour sourbehnam1374@gmail.com 10031947532846008569 10031947532846008569 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Mohammad Saleh Movahedi msm139675@gmail.com 10031947532846008570 10031947532846008570 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Babak Roshanravan Babak.137595@yahoo.com 10031947532846008571 10031947532846008571 Yes Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.