A novel safe approach to laparoscopic colorectal cancer resection in patients with ventriculoperitoneal shunt: report of two cases and literature review

Resection of solitary abdominal wall metastasis of ascending colon cancer along the ventriculoperitoneal shunt: A case report

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Colorectal cancer could metastasize to the VP shunt, although it is rare.

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Careful intraoperative manipulation would prevent metastasis to the VP shunt.

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Resection may be effective for VP shunt-related skin metastases.

Introduction

Ventriculoperitoneal (VP) shunt is often placed as a treatment for hydrocephalus. Additionally, it is also not uncommon to perform laparoscopic surgery for colon cancer with a VP shunt in place. It is very rare for colorectal cancer to metastasize to an implanted VP shunt. We report a case of VP shunt-related metastasis of the ascending colon that was successfully resected.

Presentation of case

A 79-year-old man who had a VP shunt for hydrocephalus two years earlier underwent laparoscopic right colectomy for ascending colon cancer. Six months after the colectomy, imaging examinations showed mass formation in the subcutaneous tissue of the abdominal wall along the VP shunt. Because of the possible metastasis of colorectal cancer and the fact that it was a solitary lesion, a tumor resection with replacement of the VP shunt was performed. Histopathological examination revealed that the mass was a metastasis of colon cancer.

Discussion

This case involves the metastasis of colorectal cancer in the subcutaneous tissue of the abdominal wall after laparoscopic surgery, and since the tumor had reached the serosa, the possibility of metastasis by pneumoperitoneum was considered. Careful intraoperative manipulation is considered to be important for prevention.

Conclusion

Metastasis of colorectal cancer to the VP shunt is extremely rare, but possible. In such cases, intraoperative prevention and careful postoperative follow-up are required.

Laparoscopic bowel resection in the presence of a lumbo-peritoneal shunt: a rare case

The presence of a cerebrospinal fluid (CSF) shunt was previously considered a contra-indication to laparoscopic surgery, however, case reports appeared that describe laparoscopic surgery proceeding with no adverse outcomes in such patients. The majority of these reports relate to laparoscopic cholecystectomy. Here we present what we believe to be only the second report of a patient undergoing laparoscopic bowel resection in the presence of a lumbo-peritoneal shunt. With this case we aim to add to the evidence that more major laparoscopic procedures can be performed safely in the presence of CSF shunts and with a brief review of the current evidence, have suggested appropriate monitoring and precautionary measures for approaching these procedures.

Laparoscopic Resection of Advanced Colorectal Cancer in a Patient with Lumboperitoneal Shunt

A 78-year-old woman with lumboperitoneal (LP) shunt was diagnosed with advanced cancer of the ascending colon. Laparoscopic right hemicolectomy was performed without manipulating the catheter. The patient's postoperative course was uneventful, with no shunt-related complications or neurological deficit. The number of patients with cerebrospinal fluid (CSF) shunt who require abdominal surgery has been increasing. There are only few studies on laparoscopic surgery for patients with LP shunt, and the safety of pneumoperitoneum in the CSF shunt remains controversial. Consistent with other studies, we considered that pneumoperitoneum with a pressure of 10 mmHg has few negative effects. Our recommendations are as follows: (1) during colorectal resection, laparoscopic surgery can be performed without routine manipulation of the shunt catheter; (2) altering the location of the port is necessary to prevent both damage to the shunt tube during surgery and wound infection postoperatively; and (3) laparoscopic surgery is superior to laparotomy because it is associated with reduced surgical site infections and postoperative adhesions. However, laparoscopy should be performed at least 3 months after the construction of CSF shunt.