Trichostasis Spinulosa of the Heel: Unique Presentation with Characteristic Morphology

Trichostasis Spinulosa is a peculiar lesion of the hair follicle that typically presents on the face. We present a case of a 59 years old Middle-Eastern male who presented with a dark lesion on his heel. Examination revealed a 1.7 cm well-circumscribed black necrotic plaque with surrounding overhanging border with a differential diagnosis of melanoma. Histologically, the lesion was formed by inflamed clusters of numerous small hair shafts, consistent with Trichostasis Spinulosa of the heel. We report this case because of its unusual location and unique presentation.