Ectopic Sebaceous Glands in the Hair Follicle Matrix: Case Reports and Literature Review of This Embryogenic Anomaly

The document reports on the rare developmental anomaly of ectopic sebaceous glands within the hair follicle matrix, presenting two male case studies that exhibit this condition. It reviews the characteristics of individuals with this aberration and provides an overview of hair follicle anatomy and the embryologic aspects of hair development. The study highlights that while the presence of ectopic sebaceous glands in the hair follicle matrix is a subject of intellectual interest, the underlying causes and clinical significance of this phenomenon are still unclear.