{Reference Type}: Case Reports {Title}: Post-traumatic Bullous Pilomatrixoma Exploring the Pathogenesis. {Author}: Martínez-Ortega JI;Ortega-Valerio G;Ramirez-Cibrian AG; {Journal}: Am J Dermatopathol {Volume}: 46 {Issue}: 7 {Year}: 2024 Jul 1 {Factor}: 1.319 {DOI}: 10.1097/DAD.0000000000002681 {Abstract}: UNASSIGNED: This report demonstrates the rare variant of bullous pilomatrixoma in a 10-year-old boy who presented with a rapidly growing, red-colored, bullous nodule on his neck after trauma. The exact etiology of this subtype of pilomatrixoma is unclear, but previous studies have suggested that mechanical trauma may trigger its development.