Verjans, Marcelien, Katrien Jansen, Frank Van Calenbergh, Philippe De Vloo, and Marijke Proesmans. “Benign Coccygeal Dimple or Dermal Sinus Tract: A Big Difference”. Belgian Journal of Paediatrics 23, no. 2 (July 11, 2021). Accessed April 14, 2026. http://belgjpaediatrics.com/index.php/bjp/article/view/150.