There is a definition which all medical students memorize by their second year, which is an oft-asked question, especially in viva, commonly known as Willis definition of tumour. It states :   A neoplasm is an abnormal mass of tissue, the growth of which exceeds and is uncoordinated with that of the normal tissues, and persists in the same excessive manner after cessation of the stimulus which evoked the change. I feel everyone needs to be aware of this definition. In simple layman terms, any extra lump that grows excessively and rapidly should be checked out by a medical professional as early as possible. Most of them might be a simple…