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. 2021 Sep 1;41(5):1368–1386. doi: 10.1148/rg.2021200207

Figure 8.

Nonpancreatic pseudocyst in a 40-year-old woman with sudden onset of severe right upper abdominal pain, with pathologic correlation.(a, b) Sagittal US (a) and axial contrast-enhanced CT (b) images show a well-circumscribed complex cystic lesion centered in the left mesentery (arrow). There is a fluid-fluid level (*), with chylous fluid layering nondependently. (c) Photograph of the resected specimen shows thick yellow fluid oozing from the incised surface. (d) Low-power photomicrograph (H-E stain) shows the thick fibrous cyst wall containing cholesterol crystals (arrowhead) and lymphocytes (*), with no epithelium (arrow). Pseudocysts occur when a fibrous wall forms around fluid or a foreign body and lack a true lining.

Nonpancreatic pseudocyst in a 40-year-old woman with sudden onset of severe right upper abdominal pain, with pathologic correlation. (a, b) Sagittal US (a) and axial contrast-enhanced CT (b) images show a well-circumscribed complex cystic lesion centered in the left mesentery (arrow). There is a fluid-fluid level (*), with chylous fluid layering nondependently. (c) Photograph of the resected specimen shows thick yellow fluid oozing from the incised surface. (d) Low-power photomicrograph (H-E stain) shows the thick fibrous cyst wall containing cholesterol crystals (arrowhead) and lymphocytes (*), with no epithelium (arrow). Pseudocysts occur when a fibrous wall forms around fluid or a foreign body and lack a true lining.