Peñafiel-Pallares, Wilson Sebastian, Camila Brito-Balanzategui, Juan Velez-Posada, and Jonathan Velasco. “Reconstruction of a Large Lumbar Carcinoma Defect Using a Subtype III Keystone Flap: Case Report”. International Journal of Medical Students 13 (December 31, 2025): S221. Accessed March 2, 2026. https://ijms.info/IJMS/article/view/3909.