Resumen: The clavicle is an infrequent location for primary tumors in general, and aneurysmal bone cyst (ABC) of the clavicle is particularly rare. The challenge of the functional and esthetic result in the treatment of these lesions in the pediatric population is high when considering the reconstruction of critical bone defects. In this article, we present the case of a seven -year -old boy with an ABC in the middle third of the clavicle, treated by resection and reconstruction with free autograft of the fibula stabilized by using an intramedullary titanium nail. We offer a description of the used technique, considerations about treatment options in children, and a follow-up of more than two -and -a -half years. Idioma: Inglés DOI: 10.5606/ehc.2020.74184 Año: 2020 Publicado en: Joint diseases and related surgery 31, 2 (2020), 367-371 ISSN: 2687-4784 Factor impacto JCR: 0.0 (2020) Categ. JCR: SURGERY rank: 211 / 212 = 0.995 (2020) - Q4 - T3 Categ. JCR: ORTHOPEDICS rank: 82 / 82 = 1.0 (2020) - Q4 - T3 Factor impacto SCIMAGO: 0.0 - Orthopedics and Sports Medicine - Surgery - Rehabilitation