Nazarian RS, Vyas N, Scheinfeld N, Phelps RG. Bilateral Porokeratosis Ptychotropica on the Gluteal Cleft: A Case Report and Review of the Literature. J of Skin [Internet]. 2019Dec.2 [cited 2025Jan.10];3(6):427-30. Available from: https://skin.dermsquared.com/skin/article/view/593