title: Pancreatic accessory spleen. False positive with99mTc-Octreotide.
abstract: The case is presented on a patient with abdominal pain and suspicion of neuroendocrine tumor in the tail of the pancreas shown in the abdominal CT and MRI. Whole-body scintigraphy and abdominal SPECT/CT with99mTc-octreotide were performed that showed a nodular lesion partially on the posterior side of the pancreas tail. This nodule showed faint tracer uptake, and was reported as probable neuroendocrine tumor. Partial pancreatectomy and splenectomy were performed, and the histological study identified the lesion as an ectopic spleen. There are similar cases in the literature that match these findings, but this lesion is still frequently diagnosed after performing unnecessary surgery. When an asymptomatic intrapancreatic mass is detected, an accessory spleen should be considered and specific diagnostic techniques should be performed, such as labeled and denatured red blood cell SPECT/CT.
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain. Electronic address: titoserrano@gmail.com.
authors.forename: J
authors.initials: J
authors.lastname: Serrano-Vicente
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain.
authors.forename: J R
authors.initials: JR
authors.lastname: Infante-Torre
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain.
authors.forename: L
authors.initials: L
authors.lastname: García-Bernardo
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Moreno-Caballero
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Martínez-Esteve
authors.affiliation: Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain.
authors.forename: J I
authors.initials: JI
authors.lastname: Rayo-Madrid
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000368:Aged; D002828:Choristoma / Q000000981:diagnostic imaging* / Q000601:surgery; D003951:Diagnostic Errors; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018358:Neuroendocrine Tumors / Q000175:diagnosis; D015282:Octreotide / Q000031:analogs & derivatives; D015609:Organotechnetium Compounds; D010180:Pancreatectomy; D010182:Pancreatic Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000175:diagnosis; D019275:Radiopharmaceuticals; D000072098:Single Photon Emission Computed Tomography Computed Tomography; D013154:Spleen / Q000000981:diagnostic imaging* / Q000601:surgery; D013156:Splenectomy; D013667:Technetium; D014057:Tomography, X-Ray Computed; D019564:Unnecessary Procedures; D051598:Whole Body Imaging
chemical_list: C493098:99mTc-octreotide; D015609:Organotechnetium Compounds; D019275:Radiopharmaceuticals; C000615519:Technetium-99; D013667:Technetium; D015282:Octreotide
keywords: Accessory spleen; Bazo accesorio; Cola de páncreas; False positive: Pancreatic tail; Falso positivo; Neuroendocrine tumor; Octreotide; SPECT/CT; SPECT/TC; Tumor neuroendocrino