1) To learn the imaging spectrum of a wide variety of ectopic/accessory organs. 2) To learn the characteristic imaging features for differentiating these conditions from neoplastic conditions.

The contents of this exhibit Ⅰ. Introduction Ⅱ. Ectpic tissue in the abdomen 1. Ectopic pancreas 2. Accessory spleen / Wandering spleen / Splenosis / Polysplenia 3. Ectopic gallbladder 4. Ectopic liver / accessory lobe of the liver 5. Ectopic kidney / supernumerary kidney 6. Ectopic adrenal tissue 7. Cryptorchidism 8. Ectopic ovary 9. Ectopic prostate tissue 10. Ectopic uterus 11. Accessory breast tissue Ⅲ. Summary of the diagnostic procedures Ⅳ. Conclusion Ⅰ. Introduction Ectopic and/or accessory tissue of the abdominal organs is usually asymptomatic...

Ⅱ. Ectopic tissues in the abdomen 1. Ectopic pancreas Ectopic pancreas refers to pancreatic tissue without connection to the body of the pancreas. The most common location of the ectopic pancreas is the stomach, followed by the duodenum and jejunum, and these locations account for more than 70% of cases (1). In the stomach, the antrum is most commonly affected. Less common locations for ectopic pancreas include the ileum, Meckel’s diverticulum, gallbladder, bile ducts, splenic hilum, umbilicus, fallopian tubes, mediastinum, esophagus, lymph nodes, and omentum...

Ⅲ. Summary/Conclusion Most of ectopic tissues in the abdomen remain asymptomatic. However, some conditions may present with acute abdomen or be complicated with secondary malignancies. Although the clinical diagnosis of ectopic tissue is crucial for avoiding unnecessary surgery, itis oftenchallenging without knowledge of ectopic tissues, including their locations, associated clinical settings, imaging features, and diagnostic procedures of choice. US or CT would be commonly an initial modality of choice for incidentally found abdominal ectopic tissues. The radiologic suspicion of ectopic or accessory tissue usually depends...

1. Silva AC, Charles JC, Kimery BD, Wood JP, Liu PT. MR Cholangiopancreatography in the detection of symptomatic ectopic pancreatitis in the small-bowel mesentery. American Journal of Roentgenology. 2006;187(2):W195-W7. 2. Kim SH, Lee JM, Han JK, Lee JY, Kim KW, Cho KC, et al. Intrapancreatic accessory spleen: findings on MR Imaging, CT, US and scintigraphy, and the pathologic analysis. Korean Journal of Radiology. 2008;9(2):162-74. 3. Mortelé KJ, Mortelé B, Silverman SG. CT features of the accessory spleen. American Journal of Roentgenology. 2004;183(6):1653-7. 4. Yildiz AE,...