Peritoneal<unk>  is a rare complication of ventriculoperitoneal shunt catheter placement. The time from the last shunting procedure to the development of an<unk><unk>  ranges from 3 weeks to 5 years. Cerebrospinal fluid<unk> s are seen as a thin-walled cystic mass around the shunt tip. The wall is composed of fibrous tissue without an epithelial lining and is filled with cerebrospinal fluid. Debris is identified in the majority of the fluid collections. The<unk>  can either move freely within the peritoneal cavity or adhere to small-bowel loops, the serosal surface of solid organs, the parietal peritoneum, or small-bowel loops. The latter would explain why some bowel loops may become engulfed when the<unk>  increases in size or why the<unk>  may be prone to torsion. Pediatric patients commonly present with symptoms of elevated intracranial pressure and<unk>  pain, whereas adults predominantly present with<unk>  signs only.
Abdominal CSF pseudocyst
Retroperitoneal abscess
Retroperitoneal hematoma
Adrenal hemorrhage
Intracerebral metastases
Subdural empyema
Brain abscess
Intra-axial hemorrhage