The article presents a case study of a 29-year old male patient with a lesion over the abdomen. It provides the patient's medical information, including his family history, cutaneous examination, and skin biopsy. The patient was diagnosed with nevus comedonicus, an abnormality of the skin comprising numerous keratin-filled pits and a result of a defect in the development of the hair follicle. Complications and treatments of the abnormality are offered.