Malignant neoplasms of mesothelial and soft tissue (C45-C49)

ICD-10 codes C45-C49 cover malignant neoplasms arising from mesothelial tissue, soft tissues, peripheral nerves, and connective tissues. These codes specifically identify different types of cancers such as mesothelioma, Kaposi's sarcoma, malignant peripheral nerve tumors, retroperitoneal cancers, and various soft tissue sarcomas.

The range includes mesothelioma (C45), with detailed codes for pleura (C45.0), peritoneum (C45.1), pericardium (C45.2), and other less common sites, providing precise classification for tumors of the mesothelial lining. Kaposi's sarcoma (C46) is categorized by affected body regions like skin, soft tissue, lung, and gastrointestinal sites, helping in identifying this vascular tumor associated with immunodeficiency. Malignant neoplasms of peripheral nerves and the autonomic nervous system (C47) are further divided by anatomical location (head, limbs, thorax, abdomen, pelvis, and trunk) and specify right, left, or unspecified limbs for accuracy. The codes also include malignant retroperitoneal and peritoneal tumors (C48), distinguishing specific peritoneal sites and retroperitoneal regions. Additionally, malignant neoplasms of other connective and soft tissues (C49) focus on tumors involving soft tissue and connective tissue across body regions such as head, limbs, trunk, and pelvis. This section also includes gastrointestinal stromal tumors (C49.A), which are important in identifying primary tumors of the digestive tract's connective tissues. These codes assist coders and clinicians in precisely documenting distinct malignant soft tissue tumors for proper diagnosis, treatment planning, and research.