Neoplasia

特許 係属中 Neoplasm (from Ancient Greek νεο- neo- "new" and πλάσμα plasma "formation, creation"), is an abnormal growth of tissue, and when also forming a mass is commonly referred to as a tumor or tumour,[1][2] This abnormal growth (neoplasia) usually but not always forms a mass.[3] The World Health Organization (WHO) classifies neoplasms into four main groups: benign neoplasms, in situ neoplasms, malignant neoplasms, and neoplasms of uncertain or unknown behavior.[4] Malignant neoplasms are also simply known as cancers.