Neoplasm true UMLS:C0027651 Epileptogenic tumors are, in the majority, biologically benign lesions that do not usually change over time. As a result, they do not require oncological surgery and surveillance, instead their management centres on control of seizures. Some tumors are highly associated with refractory epilepsy, and are amenable to epilepsy surgery due to their anatomic and imaging features, epilepsy surgery is therefore an important treatment option for this group of patients. Abnormal tissue mass Tumor Neoplasia UMLS:C0006826 HP:0003008 An organ or organ-system abnormality that consists of uncontrolled autonomous cell-proliferation which can occur in any part of the body as a benign or malignant neoplasm (tumour). NCIT:C3262 SNOMEDCT_US:363346000 The World Health Organization (WHO) classifies neoplasms into four main groups: (i) benign neoplasm, (ii) in situ neoplasm, (iii) malignant neoplasm, and (iv) neoplasm of uncertain or unknown behavior. A malignant neoplasm is also known as cancer. human_phenotype Oncology SNOMEDCT_US:108369006 MSH:D009369 Oncological abnormality HP:0002664 Cancer Tumour HP:0006741 structural etiology