|Neuroendocrine tumors are also referred to as neoplasms; these are abnormal growth of tissues that arise from endocrine (hormonal) cells and nervous systems. Many are harmless in the long run (benign), while some become progressively worse (malignant). These neuroendocrine tumors are often called carcinoid tumors which most commonly occur in the intestine. High-impact journals are those considered to be highly influential in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.