Malignant melanoma is a common cancer of skin and it is one of the most debilitating, aggressive form. This is due to the fact that it is usually detected towards the terminal stage. An early diagnosis of malignant melanoma will help to subvert and reduce the incidence of severity . The Ugly Duckling sign is a useful sign for an early detection of malignant melanoma. This sign is of great utility as it can be used by both physicians and the general public to identify early signs of melanoma and thereby improve the prognosis of the disease.