An adult case of a retroperitoneal isolated enteric duplication cyst with the imaging changes over time

Abstract

Background Adult cases of retroperitoneal isolated enteric duplication cyst (IEDC) are rare, with only 17 case reports in the relevant literature. We herein present a case, which was characterized by changes in intra-cystic density on computed tomography (CT), which was safely resected by laparoscopic surgery. Case presentation The patient was a 60-year-old male who received abdominal CT to investigate the cause of increased serum CA19-9 levels. CT revealed a unilocular cystic mass located in the lower right retroperitoneum. The size increased from 5 to 10 cm in three and a half years and the CT value decreased from 101 Hounsfield Units (HU) to 20 HU. We performed laparoscopic surgical resection, because the possibility that the enlargement of the lesion represented malignant transformation could not be denied. The large cystic mass firmly adhered to the appendix and its mesentery via the retroperitoneum, the appendix was resected en bloc with the cystic lesion. Microscopically, it had no communication with the appendix, and had an intestinal wall structure of muscularis mucosae and muscularis propria. The final pathological diagnosis was IEDC in the retroperitoneal space. There was no histological evidence of malignancy. Conclusion When we encounter a retroperitoneal cystic lesion, we should consider the possibility of malignancy to determine the treatment strategy and perform a careful operation without breaking the cyst wall, irrespective of the preoperative diagnosis.

Uncommon Presentation of Gastric Duplication Cyst with Left-Sided Portal Hypertension: A Case Report and Literature Review

“…In asymptomatic cases, GDCs may be discovered in screening endoscopy, and the aspect of gastric duplication cysts may be described as submucosal masses compressing the gastric cavity, but with a normal aspect of the gastric mucosa, without signs of infiltration. Endoscopically, this type of gastric malformation may be difficult to distinguish from other submucosal lesions, such as a leiomyoma or a gastrointestinal stromal tumor (GIST), due to the normal aspect of the overlying mucosa and the compressive pattern, which are representative of all these pathologies [9,10]. The current advances in imaging enable an improved ability to make the correct diagnosis and ensure better case management.…”

Retroperitoneal Foregut Duplication Cyst Containing Gastric, Respiratory, and Pancreatic Tissue Misinterpreted as an Adrenal Mass on Imaging: A Case Report and Review of the Literature

“…Herein, we report the 10 th case of foregut duplication cyst containing ectopic pancreatic tissue, and the first one with the three types of epithelia: gastric, respiratory, and pancreatic in a very unusual location (retroperitoneum) 2,11 and perform a systematic literature review in the English literature.…”