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Peritoneal Carcinomatosis Index (PCI)
Clinical Context & Background
The Peritoneal Cancer Index (PCI) quantifies the extent of peritoneal carcinomatosis. It is calculated by summing the lesion size scores (0-3) in 13 abdomino-pelvic regions. It is a critical prognostic factor for colorectal, appendiceal, and ovarian cancers and helps determine candidacy for Cytoreductive Surgery (CRS) and HIPEC.
Formula Logic
Sum of scores (0-3) for 13 regions. Max Score = 39.Reference Data
| Lesion Size Score | Definition |
|---|---|
| LS 0 | No tumor seen |
| LS 1 | Tumor nodules < 0.5 cm |
| LS 2 | Tumor nodules 0.5 cm - 5.0 cm |
| LS 3 | Tumor nodules > 5.0 cm or confluent |
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Evidence-based oncology decision support. Verify with clinical guidelines.