Lamberti, A., Filippou, G., Adinolfi, A., Fimiani, M., & Rubegni, P. (2015). Infantile perianal pyramidal protrusion: a case report with dermoscopy and ultrasound findings. Dermatology Practical & Conceptual, 125-128. https://doi.org/10.5826/dpc.0502a25