2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Malignant Neoplasm Of Digestive Organs And Peritoneum 150-159 > Malignant Neoplasm Of Retroperitoneum And Peritoneum 158.* > 2008 ICD-9-CM Diagnosis 158.0 Malignant neoplasm of retroperitoneum  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 158.0 can be accessed here. A primary or metastatic malignant neoplasm involving the retroperitoneum. The vast majority of cases are carcinomas, lymphomas, or sarcomas.--2004 158.0 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 158.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 158.0 also known as: Periadrenal tissue Perinephric tissue Perirenal tissue Retrocecal tissue