This video tells us about a skin pathology known as Acantholysis Nigricans which are benign epithelial tumors and are thick lesions, velvety hyperpigmented plaque occurring in flexural areas and show basal hyperpigmentation. This video tells the causes, symptoms, associated risk factors and medical conditions of these tumours. TIMELINE: 0:01 Introduction 1:44 Associated risk factors 1:50 Population affected 2:10 Medical condition 3:18 Genetic condition 3:46 Medications 4:30 Mechanism of acanthosis nigricans 6:22 Treatment 8:07 End