Malignant neoplasm of connective and other soft tissue of abdomen

This code signifies a primary cancerous tumor originating in the connective tissues (e.g., fat, muscle, fibrous tissue) or other soft tissues within the abdominal cavity. This includes various types of sarcomas, such as liposarcoma, leiomyosarcoma, or fibrosarcoma, when located in the abdomen.

Use this code when documentation clearly states a malignant neoplasm of the connective or soft tissues specifically located in the abdomen. This applies to primary tumors, not metastatic disease to the abdomen. Supporting documentation would include pathology reports confirming malignancy and imaging studies or operative reports specifying the abdominal location.

• Ensure the documentation specifies "malignant" and not benign or uncertain behavior.
• Verify the tumor's primary site is the abdomen; do not use for metastatic lesions.
• Distinguish from neoplasms of specific abdominal organs (e.g., stomach, liver), which have their own codes.