ICD-11 classes
13 Diseases of the digestive system
Diseases of peritoneum
Neoplasms of peritoneum or retroperitoneum

ICD-11 Neoplasms of peritoneum or retroperitoneum

Neoplasms of peritoneum and retroperitoneum are the tumour originated from the peritoneum and the structure of the retroperitoneum. The tumour cells are derived from the mesothelium cells, nerve cells, or other soft tissue cells.

The diagnosis includes nothing.

The diagnosis excludes nothing.

Diagnosis contains 4 clarifying diagnoses:

1. Malignant neoplasm metastasis in retroperitoneum or peritoneum
   It contains 2 clarifying diagnoses.
2. 2E85.1 — Benign fibrohistiocytic tumour of retroperitoneum or peritoneum
3. 2C50 — Malignant neoplasms of retroperitoneum
   It contains 3 clarifying diagnoses.
4. 2C51 — Malignant neoplasms of peritoneum
   It contains 5 clarifying diagnoses.