Congenital extracranial meningioma

Hydrocele of the canal of Nuck as a result of a rare ventriculoperitoneal shunt complication

Patients with ventriculoperitoneal (VP) shunts may have multiple complications. Migration of the peritoneal catheter into some anatomical or congenitally open cavities can cause inguinal or genitourinary manifestations such as hernia, hydrocele or acute scrotum, and these are common in male infants. We report a very rare complication of VP shunt encountered in a female infant, manifesting as hydrocele of the canal of Nuck, the female counterpart of hydrocele of the spermatic cord. It is emphasized that VP shunts may also cause clinical inguinal manifestations in female infants, and groin or external genital organ swelling in these patients may be an important sign of shunt malfunction.

The incidence of inguinal complications after ventriculoperitoneal shunt for hydrocephalus

AIM

This study outlines the incidence of acquired clinical inguinal manifestations (CIM) in infants undergoing ventriculoperitoneal (VP) shunt procedures, and the possible underlying mechanisms in the development of these pathologies.

MATERIAL AND METHODS

The charts of children who had undergone VP shunt procedures for hydrocephalus between 1992 and 2002 were reviewed. All patients were contacted by a telephone interview, and they were invited to be examined in the outpatient clinic of paediatric surgery for the development of groin manifestation.

RESULTS

Eighty-eight patients responded to the inquiry. Twenty-one (23.8%) patients developed a CIM. Three of them were premature infants. The mean interval between the shunt procedure and the diagnosis of CIM was 5.3 months (20 days to 48 months). Nineteen of the patients who developed a CIM were in the 0- to 12-month age group when the VP shunt procedures were initially performed. Ten CIM occurred on the right (47%), 7 on the left (33%) and 4 were bilateral (20%). The rate of bilateral patency as an operative finding was 76%. There was one recurrence (4.8%).

CONCLUSION

The younger the age at which the VP shunt was performed, the higher the incidence of CIM. Bilateral manifestations were higher than in the normal population. Increased intra-abdominal pressure by accumulation of fluid in combination with the high patency rate of processus vaginalis possibly plays a role in the development of CIM in VP shunt patients. Bilateral repair should be considered even when CIM is unilateral. Special care should be given to repair procedures since the recurrence rate is relatively high.

Peritoneal Shunt Tube Migration Into the Stomach-Case Report-

A 47-year-old man presented with repeated headache and feverishness 3.5 years after undergoing ventriculoperitoneal shunt surgery for normal pressure hydrocephalus secondary to subarachnoid hemorrhage. Abdominal computed tomography revealed that the peritoneal catheter was encased by fibrous tissue and the distal end of the catheter had migrated into the stomach. The diagnosis was spontaneous gastric perforation by the ventriculoperitoneal shunt. The fibrous tissue was expected to seal the very small gastric perforation, so the catheter was successfully extracted through a scalp incision without abdominal surgical intervention.