Malignant neoplasms of retroperitoneum

Definition

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

Exclusions

• Malignant mesenchymal neoplasms
• Malignant neoplasm metastasis in retroperitoneum (2D90)
• Malignant neoplasms of omentum (2C52)
• Malignant neoplasms of peritoneum (2C51)

3 subordinate codes

• 2C50.0Cystic, mucinous or serous carcinoma of retroperitoneum
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Malignant neoplasms of retroperitoneum, peritoneum or omentum

• 2C51Malignant neoplasms of peritoneum
• 2C52Malignant neoplasms of omentum
• 2C53Malignant neoplasm involving overlapping sites of retroperitoneum, peritoneum or omentum