Written and medically reviewed by: Assoc. Prof. Cengiz Dibekoğlu, MD, General SurgeryLast updated:
What CRS and HIPEC Are
Cytoreductive surgery and HIPEC are related but separate — plus how PCI and CC scores are used in plain language.
Peritoneal metastases seed the abdominal lining. Cytoreductive surgery (CRS) aims to remove visible implants; HIPEC may add heated intraperitoneal chemotherapy afterward in selected cases — not automatically. Decision talk often includes disease burden (PCI) and how completely disease was cleared after surgery (CC score). In colorectal peritoneal disease, PRODIGE-7 found no overall-survival gain for oxaliplatin HIPEC atop complete CRS plus systemic therapy.
Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Figure summary
Labeled on this figure: PCI · CC score · CRS · HIPEC.
Figure labels (English)
- PCI
- CC score
- CRS
- HIPEC
Who may be a candidate?
- International patients preparing a structured second-opinion visit
- Patients comparing observation, medical care, and procedural options
Possible advantages
- Supports informed consent with alternatives and recovery themes
- Highlights red flags that should trigger urgent contact
Limits & realistic expectations
- Cannot replace examination, imaging, or pathology
- Local protocols and tumor-board decisions may refine timing
- Outcomes vary with anatomy, stage, and comorbidity
Step-by-step overview
- 1
Clarify the clinical question
What diagnosis is being confirmed and what decision follows?
- 2
Choose first-line tests
Start with the test that answers the leading question safely.
- 3
Stage if needed
Add imaging or endoscopy when results would change management.
- 4
Name limitations
No test replaces exam; false reassurance is a risk.
- 5
Link to next step
Diagnosis should point to observation, medical care, or procedure.
Key points
What is PCI (peritoneal cancer index)?
PCI is a numeric estimate of peritoneal disease burden. Imaging may suggest a range before surgery; the score is often clarified during the operation or at staging laparoscopy. It is a shared language for extent — not a magic formula used alone.
How is PCI calculated?
The abdomen is divided into regions (commonly 13 regions, numbered 0–12 in the classic Sugarbaker map). Each region is scored 0–3 by lesion size. Scores are added for a total of about 0–39. Higher totals suggest greater burden, but fixed cut-offs are not identical for every histology or center. Do not self-calculate a definitive PCI from a website — ask your surgical team what your imaging and operative findings imply.
- 0 = no disease in that region
- 1 = small foci (usually <0.5 cm)
- 2 = moderate lesions (about 0.5–5 cm)
- 3 = large or confluent disease (usually >5 cm)
- Key note inside
CC score after surgery
The completeness of cytoreduction (CC) score describes residual visible disease once CRS is finished. Most pathways aim for CC-0 or CC-1. When substantial disease remains (CC-2/CC-3), the benefit of maximal surgery is often limited — and HIPEC does not compensate for incomplete clearance.
- CC-0: no visible residual disease
- CC-1: only tiny residual deposits (often millimetric)
- CC-2 / CC-3: macroscopic disease remains
- Key note inside
CRS first, HIPEC second
Completeness of cytoreduction is usually the dominant factor discussed; HIPEC is not automatically added to every CRS.
Staging laparoscopy
CT and MRI can miss small peritoneal implants. In selected patients, laparoscopy helps refine PCI, assess small-bowel surfaces, and judge whether complete cytoreduction is realistic before a large laparotomy.
- Key note inside
Important
This page is for education. It is not medical advice and does not replace a visit with your physician.
Frequently asked questions
Are CRS and HIPEC the same thing?
No. CRS removes visible peritoneal disease; HIPEC is heated intraperitoneal chemotherapy that may be added in selected cases.
What is the PCI score?
The peritoneal cancer index estimates disease burden across abdominal regions (each scored 0–3; total about 0–39). Imaging gives an estimate; surgery or staging laparoscopy often refines it. Patients should not self-calculate a final number.
What is the CC score?
Completeness of cytoreduction describes how much visible disease remains after CRS. CC-0/CC-1 (complete or near-complete clearance) is usually the goal; HIPEC does not “rescue” incomplete clearance.
Who should review my case?
A multidisciplinary team experienced in peritoneal disease.
More chapters in this hub
Appointment / info
This page is for education. It is not medical advice and does not replace a visit with your physician.
Medical editor: Assoc. Prof. Cengiz Dibekoğlu, MD · Last medically reviewed: August 2026 · English patient-education chapter.