ICD-11 classes
02 Neoplasms
Malignant neoplasms, except primary neoplasms of lymphoid,...
Malignant neoplasms, stated or presumed to be primary, of...
Malignant neoplasms of retroperitoneum, peritoneum or...
2C50 — Malignant neoplasms of retroperitoneum

ICD-11 2C50 — Malignant neoplasms of retroperitoneum

A primary or metastatic malignant neoplasm involving the retroperitoneum. The vast majority of cases are carcinomas, lymphomas, or sarcomas.

The diagnosis includes nothing.

Diagnosis with code 2C50 contains 3 clarifying diagnoses:

1. 2C50.0 — Cystic, mucinous or serous carcinoma of retroperitoneum
2. 2C50.Y — Other specified malignant neoplasms of retroperitoneum
3. 2C50.Z — Malignant neoplasms of retroperitoneum, unspecified

The diagnosis is coded elsewhere:

• Neoplasms of peritoneum or retroperitoneum #14641
• Malignant neoplasms of retroperitoneum #14646