A child with a traumatic uriniferous perirenal pseudocyst was presented. The diagnosis was not made by routine radiological studies, but ultrasound examination demonstrated a perirenal fluid accumulation clearly. The usefulness of the ultrasound examination in the diagnosis of this condition was emphasized. The characteristic finding in ultrasonogram consists of a hydronephrotic kidney and its invagination into the echolucent mass. When perirenal cystic lesions are demonstrated by ultrasound, the junctional zone between the cyst and kidney should be carefully checked for signs of invagination of the kidney into the cyst.

The radiographic and computed tomographic findings of a gastric duplication cyst contiguous to the stomach first diagnose in a 13-year-old-woman are presented. She revealed pyloric stenosis and chronic relapsing pancreatitis. In the smooth muscle wall and the connective tissue of the cyst lay aberrant pancreatic tissue and large neural bands.

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