Neuroendocrine tumors of the ovary tumors are little known and infrequent. They are made up of cells appearing in the endocrine and nervous systems. These tumors are rare, but most of them are very aggressive, especially when they are diagnosed beyond FIGO Stage I. The distinction among the different subtypes is difficult and requires efficient techniques. Symptoms of neuroendocrine tumors are often nonspecific (redness in the face, diarrhea, asthma, abdominal pain and etc.,) and confused with more common diseases. Misdiagnosis is often asked: menopause or irritable bowel syndrome. Often the correct diagnosis is not made until years after the onset of symptoms. The relative rarity of these diseases and the lack of specificity of the symptoms make them often be diagnosed several years after onset. Fortunately, science has made significant advances in the diagnosis and treatment of neuroendocrine tumors. We report the case of a woman of 54 years, with abdominopelvic mass, in whom abdominal ultrasound revealed a mass avascular tissue Doppler taking the screen. The abdominopelvic CT showed a large cystic mass solido—abdominopelvic whose origin is difficult to determine. The patient underwent an exploratory laparotomy. Anapath the results of the right ovary were in favor of a well-differentiated neuroendocrine lesion.