HIPEC for Peritoneal Cancer: Procedure Steps, Risks, and Recovery

HIPEC for peritoneal cancer is a specialized treatment that combines cytoreductive surgery with heated chemotherapy placed directly inside the abdomen. It may be considered for selected patients when cancer has spread to the peritoneum, and careful evaluation helps determine whether the potential benefits outweigh the risks.

Overview: What Is HIPEC for Peritoneal Cancer?

HIPEC for peritoneal cancer is a treatment approach used for selected people whose cancer involves the peritoneum, the thin lining that covers the inside of the abdomen and many abdominal organs. HIPEC stands for hyperthermic intraperitoneal chemotherapy. During the procedure, chemotherapy medicine is warmed and circulated inside the abdominal cavity, where it can directly contact microscopic cancer cells that may remain after surgery.

HIPEC is most often performed together with cytoreductive surgery. Cytoreductive surgery is an operation designed to remove visible cancer deposits from the peritoneal surfaces and, when necessary, affected organs or tissues. The goal is to reduce the amount of tumor as much as safely possible before the heated chemotherapy is delivered.

This treatment may be considered for peritoneal spread from several cancers, including certain colorectal, appendix, ovarian, gastric, and primary peritoneal cancers, as well as peritoneal mesothelioma and pseudomyxoma peritonei. It is a major procedure, so the decision is individualized. Doctors consider the cancer type, how widely it has spread, whether visible disease can be removed, and the patient’s overall health.

How Peritoneal Cancer Is Evaluated Before HIPEC

Before HIPEC is recommended, the care team needs a detailed understanding of the cancer and the patient’s general condition. Evaluation usually includes imaging tests such as CT, MRI, or PET-CT when appropriate. Blood tests, tumor markers, pathology review, and assessment of heart, lung, kidney, and nutritional status may also be needed.

Doctors often assess the extent of peritoneal disease using a structured surgical or imaging-based scoring approach. This helps estimate whether cytoreductive surgery can remove all or nearly all visible cancer. If disease is too widespread, or if it involves areas that cannot be safely removed, other treatments may be safer and more helpful.

A multidisciplinary tumor board is commonly involved. This may include surgical oncologists, medical oncologists, radiologists, pathologists, anesthesiologists, intensive care specialists, dietitians, and rehabilitation professionals. Their combined review helps ensure that HIPEC is chosen only when it is medically reasonable and aligned with the patient’s goals.

Who May Be a Candidate for HIPEC?

Candidacy for HIPEC depends on both the cancer and the person. Patients are more likely to be considered when the cancer is mainly confined to the abdominal lining and when the surgical team believes complete or near-complete removal of visible disease is possible. Some cancer types respond better to regional treatment than others, so the exact diagnosis is important.

General health is also essential. Because cytoreductive surgery with HIPEC can be long and complex, patients need enough physical reserve to tolerate anesthesia, surgery, and recovery. Doctors consider age in context, but functional status, nutrition, organ function, previous surgeries, and other medical conditions often matter more than age alone.

HIPEC may not be recommended if cancer has spread extensively outside the abdomen, if major organs cannot be safely protected, or if serious heart, lung, liver, or kidney disease makes the operation too risky. In these situations, systemic chemotherapy, targeted therapy, immunotherapy, palliative procedures, or symptom-focused care may be more appropriate. A careful discussion with the oncology team can clarify the safest options.

Procedure Steps: What Happens During HIPEC?

HIPEC is performed in an operating room under general anesthesia. The first and often longest part is cytoreductive surgery. The surgeon examines the abdomen and removes visible tumor deposits from peritoneal surfaces. Depending on the location of disease, this may include removing the omentum, parts of the peritoneal lining, or sections of affected organs such as bowel, spleen, gallbladder, uterus, ovaries, or appendix when medically necessary.

After visible tumor removal is completed, the HIPEC phase begins. Catheters are placed in the abdomen, and warmed chemotherapy solution is circulated for a set period under controlled conditions. The heat may help chemotherapy penetrate tissues more effectively and can make some cancer cells more sensitive to treatment. The medicines and timing vary by cancer type and hospital protocol.

During the HIPEC phase, the surgical and anesthesia teams closely monitor body temperature, fluid balance, blood pressure, urine output, and other safety measures. After the chemotherapy solution is drained, the abdomen is rinsed as needed, surgical repairs are completed, and incisions are closed. Some patients may need temporary drains, a urinary catheter, or nutrition support after surgery.

The total time in the operating room can vary widely because it depends on the extent of surgery required. For patients and families, it is helpful to understand that the HIPEC infusion is only one part of a broader surgical cancer treatment plan. The quality and completeness of cytoreduction are key factors in treatment planning and expected outcomes.

Possible Risks and Side Effects

HIPEC with cytoreductive surgery is a major treatment, and the care team will explain the risks in relation to the patient’s specific situation. General surgical risks include bleeding, infection, delayed wound healing, blood clots, pneumonia, and reactions to anesthesia. Bowel surgery can sometimes lead to leakage, blockage, slow bowel recovery, or the need for a temporary or permanent stoma.

Because chemotherapy is delivered mainly inside the abdomen, overall body exposure may be lower than with some intravenous treatments, but side effects can still occur. These may include nausea, fatigue, changes in blood counts, kidney strain, electrolyte changes, or temporary effects on the liver or digestive system. The team monitors blood tests and organ function closely during and after treatment.

Some patients experience pain, abdominal bloating, reduced appetite, early fullness, or changes in bowel habits during recovery. Emotional stress is also common after a complex cancer operation. Supportive care, including pain control, anti-nausea medicines, breathing exercises, nutrition planning, physiotherapy, and psychological support, can help make recovery safer and more manageable.

Risk is not the same for every person. It depends on the cancer type, disease extent, length of surgery, organs involved, previous treatments, and overall health. Patients are encouraged to ask their team to explain both the potential benefits and the likely risks in plain language before making a decision.

Recovery After HIPEC: Hospital Stay and Home Care

After HIPEC, patients are usually cared for in a high-dependency or intensive monitoring area at first, then moved to a surgical ward as they stabilize. The early recovery period focuses on pain control, safe breathing, circulation, kidney function, wound care, and gradual return of bowel activity. Walking short distances with assistance often begins as soon as it is safe.

Nutrition is an important part of recovery. Some patients start with liquids and slowly progress to soft or regular foods as bowel function returns. Others may need temporary intravenous or tube-based nutrition, especially after extensive abdominal surgery. A dietitian can help plan meals that support healing while reducing nausea, bloating, or diarrhea.

At home, recovery is usually gradual. Fatigue can last for weeks, and daily activities should be increased step by step. Patients are commonly advised to avoid heavy lifting until cleared by the surgical team, keep wounds clean and dry as instructed, take medications as prescribed, and attend all follow-up appointments.

The care team should be contacted promptly if there is fever, worsening abdominal pain, persistent vomiting, increasing redness or drainage from the wound, chest pain, shortness of breath, calf swelling, inability to pass stool or gas, or signs of dehydration. These symptoms do not always mean a serious complication, but they should be assessed quickly.

Follow-Up, Additional Treatment, and Long-Term Outlook

Follow-up after HIPEC is planned according to the cancer type, pathology results, completeness of surgery, and overall recovery. Visits may include physical examination, blood tests, tumor markers when relevant, and scheduled imaging. The goal is to monitor healing, detect possible recurrence, and decide whether any further treatment is needed.

Some patients may receive systemic chemotherapy before or after HIPEC. Others may be observed with regular follow-up if the tumor biology and surgical findings support that approach. The decision depends on many factors, including the original cancer, microscopic findings, lymph node involvement, prior treatments, and response to therapy.

Long-term outlook varies. HIPEC is not a single standard solution for all peritoneal cancers, but for carefully selected patients it may provide meaningful disease control as part of a comprehensive treatment plan. The most realistic expectations come from a direct discussion with the treating oncologist and surgeon, who can interpret the patient’s exact diagnosis and operative findings.

Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat complex peritoneal cancers for international patients, including evaluation for cytoreductive surgery and HIPEC when appropriate. Patients considering this treatment should seek care at centers experienced in peritoneal surface malignancies and complex abdominal oncology surgery.

Questions to Ask Before Choosing HIPEC

Patients and families often feel more confident when they understand the treatment plan before surgery. It can help to bring a written list of questions to appointments and, if possible, have a family member or trusted friend present. Clear communication supports shared decision-making.

Useful questions include: What type of peritoneal cancer is present? Is the cancer limited enough for complete cytoreduction? What organs might need to be removed? What chemotherapy medicine will be used for HIPEC? What are the main risks in this specific case? How long might the hospital stay be? Will additional chemotherapy be needed afterward?

It is also reasonable to ask about the surgical team’s experience, intensive care support, nutrition and rehabilitation services, and how complications are managed. Patients may ask whether a second opinion is appropriate, especially if the diagnosis is rare or the proposed operation is extensive. A well-informed patient is better prepared for both treatment and recovery.

Frequently asked questions

What does HIPEC mean?

HIPEC means hyperthermic intraperitoneal chemotherapy. It is heated chemotherapy delivered directly into the abdominal cavity, usually after surgery removes visible peritoneal tumors. The aim is to treat microscopic cancer cells that may remain on abdominal surfaces.

Is HIPEC the same as regular chemotherapy?

No. Regular systemic chemotherapy travels through the bloodstream, while HIPEC is circulated inside the abdomen during surgery. Some patients may still need systemic chemotherapy before or after HIPEC, depending on the cancer type and treatment plan.

Is HIPEC used for all peritoneal cancers?

HIPEC is not suitable for every patient or every cancer type. It is considered when the cancer pattern, overall health, and likelihood of complete cytoreductive surgery make the approach reasonable. A specialist team should review each case individually.

How long does recovery after HIPEC take?

Recovery varies depending on the extent of surgery and the patient’s health before treatment. Many people need a hospital stay followed by several weeks to months of gradual recovery at home. Fatigue, appetite changes, and bowel changes may improve slowly over time.

What are the main risks of HIPEC?

The main risks are related to both major abdominal surgery and chemotherapy exposure. They can include bleeding, infection, blood clots, bowel leakage or blockage, kidney strain, low blood counts, nausea, and prolonged fatigue. The care team monitors patients closely to reduce and manage these risks.

Will HIPEC cure peritoneal cancer?

HIPEC may help control disease in selected patients, but outcomes depend on the cancer type, extent of spread, completeness of tumor removal, and tumor biology. It should not be viewed as a guaranteed cure. The treating oncology team can provide the most realistic expectations for an individual case.

How should a patient prepare for HIPEC surgery?

Preparation may include imaging, blood tests, anesthesia evaluation, nutrition support, medication review, and planning for help after discharge. Stopping smoking, improving protein intake if advised, staying active within safe limits, and managing other medical conditions can support recovery. Patients should follow the specific instructions from their surgical and oncology teams.

References

• National Cancer Institute
• American Society of Clinical Oncology
• European Society for Medical Oncology
• Society of Surgical Oncology
• National Comprehensive Cancer Network

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.