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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Pancreatic accessory spleen. False positive with 99mTc-Octreotide
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Vol. 36. Issue 1.
Pages 53-55 (January - February 2017)
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Vol. 36. Issue 1.
Pages 53-55 (January - February 2017)
Clinical note
Pancreatic accessory spleen. False positive with 99mTc-Octreotide
Bazo accesorio intrapancreático. Falso positivo con 99mTc-Octreotide
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7
J. Serrano-Vicente
Corresponding author
titoserrano@gmail.com

Corresponding author.
, J.R. Infante-Torre, L. García-Bernardo, M. Moreno-Caballero, A. Martínez-Esteve, J.I. Rayo-Madrid
Nuclear Medicine Department, Infanta Cristina Hospital, Badajoz, Spain
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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 with 99mTc-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.

Keywords:
Accessory spleen
False positive: Pancreatic tail
Octreotide
Neuroendocrine tumor
SPECT/CT
Resumen

Presentamos un paciente con dolor abdominal y sospecha de tumor neuroendocrino por medio de TC y RM abdominales. Se realizaron imágenes de cuerpo entero y SPECT/TCcon 99mTc-Octreotide que mostraron una lesión captadora en la cara posterior del páncreas que fue interpretada como un tumor neuroendocrino. Se realizó una pancreatectomía y esplenectomía cuyo resultado anatomopatológico identificó la lesión como un bazo ectópico. Existen datos en la bibliografía que coinciden con estos hallazgos pero todavía se diagnostica con frecuencia tras la realización de una intervención quirúrgica innecesaria. Cuando se aprecia una masa intrapancreática asintomática, debe incluirse en el diagnóstico diferencial un bazo accesorio y realizar técnicas diagnósticas más específicas, como el SPECT/TC con hematíes marcados y desnaturalizados.

Palabras clave:
Bazo accesorio
Falso positivo
Cola de páncreas
Octreotide
Tumor neuroendocrino
SPECT/TC

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