When HIPEC Is Suggested for Cancer That Has Spread to the Peritoneum — Understanding Cytoreductive Surgery, Recovery, and Follow-Up

The peritoneum is a thin membrane that lines the inside of the abdomen. When cancer from organs such as the stomach, colon, or ovaries spreads along this membrane, it is called peritoneal metastasis. In the past, spread to the peritoneum was often considered inoperable, but today selected patients may be offered cytoreductive surgery (CRS) combined with heated intraperitoneal chemotherapy (HIPEC).

HIPEC is a treatment in which the surgeon first removes as much visible tumor as possible, then circulates warmed chemotherapy directly inside the abdominal cavity to reduce microscopic cancer cells that may remain. The medication is heated because warmth can enhance the drug's effect and deliver it more directly to the peritoneal surface than an intravenous route. It is not suitable for every case of peritoneal spread; doctors carefully weigh how widely the tumor has spread, the patient's overall condition, and whether other organs are involved.

Because the operation can be long and extensive, recovery takes time. Pain, reduced appetite, changes in bowel habits, and fatigue are common afterward, and healing may be slower when a large area has been removed. During the chemotherapy that often follows, low blood counts such as white blood cells may delay sessions or require dose adjustments — this is not unusual. It is safest to increase activity gradually, following the recovery plan your care team provides.

After surgery, progress is monitored with tumor markers (such as CEA) and imaging. However, a single result does not tell the whole story. Small changes can look different depending on when they are measured or who reads the scan, so when a result might significantly change your treatment direction, it helps to ask your care team thoroughly and, if needed, request a re-read or further explanation. Patients and families who make an effort to understand their own results build a solid foundation for shared decision-making.

This article is for general information only and does not replace individual medical care. Because treatment choices and the interpretation of test results vary from person to person, please discuss any decisions with your own healthcare team.