Erqiong Leng

Introduction Calcifying aponeurotic fibroma (CAF) is a rare, benign but locally aggressive fibroblastic tumour first described by Keasbey in 1953.1 It typically occurs on the palms and soles of children and adolescents, with pathogenesis hypothesised to involve repetitive microtrauma to aponeurotic tissues.1 However, CAF can exceptionally arise in atypical locations such as the trunk, head and neck, and proximal extremities.2–4 Gluteal involvement remains exceedingly rare, with only one...