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Hydrocephalus, which is caused by the accumulation of cerebrospinal fluid (CSF), is a common condition in children. It is known to be most likely treated by the insertion of a ventriculoperitoneal (VP) shunt. However, a VP shunt can lead to multiple complications. The upward migration of a VP shunt is considered rare.  A newborn male baby with a known case of Chiari malformation type 2 associated with myelomeningocele (MMC) and hydrocephalus had a VP shunt inserted for control of the hydrocephalus. He presented two months after the surgery with occipital swelling at the surgical site. Shunt series followed by Computerized tomography (CT) scan showed that the distal end of the catheter had migrated upward and coiled around the valve. Urgent revision of the VP shunt was performed.  Reabsorption of subgaleal fluid, increased abdominal pressure, repeated abdominal wall contraction, and repeated head motion of the child are the previously suggested theories of upward migration of distal catheter to the site of the valve. However, the combination of multiple theories can be the logical explanation, as they do not oppose each other.

Upward Migration and Coiling of the Distal Catheter Toward the Valve Site