Hindgut gastropancreatic neuroendocrine carcinoma mimicking hydatid disease.
Primary neuroendocrine tumors of the colon are usually very rare and difficult to spot on a nonfunctional imaging. Metastatic lesions are mostly hypervascular, with only a small percentage appearing as cystic or hypovascular lesions. We present a case of a 34-year-old Hispanic female with a history of dull aching upper abdominal pain lasting for a few months. Initial abdominal ultrasound revealed multiple cystic lesions replacing the hepatic parenchyma concerning for a hydatid disease. Liver biopsy was obtained due to negative serology for hydatid disease, which surprisingly revealed a metastatic neuroendocrine tumor of unknown etiology. The primary disease was depicted within the sigmoid colon on a whole-body Octreotide single-photon emission computed tomography-computed tomography done following the biopsy.
['Elgendy|Azza A|AA|', 'MacDonald|William|W|', 'Whitnah|Joseph|J|', 'Malone|Daniel|D|', 'Johnson|Brandon|B|', 'Huq|Nadia|N|']
CE1-CE4 Ki-67 Octreotide—synaptophysin