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Gilly peritoneal carcinomatosis staging.
| Stage | Peritoneal carcinomatosis description |
| Stage 0 | No macroscopic disease |
| Stage 1 | Malignant implants less than 5 mm in diameter Localized in one part of the abdomen |
| Stage 2 | Diffuse to the whole abdomen |
| Stage 3 | Malignant implants 5 mm to 2 cm |
| Stage 4 | Large malignant nodules (more than 2 cm) |
