C76-C80: Malignant neoplasms of ill-defined, secondary and unspecified sites

C76: Malignant neoplasm of other and ill-defined sites

Malignant neoplasms of other and ill-defined sites refer to a group of conditions characterized by uncontrolled growth and spread of abnormal cells in places in the body that are not precisely identified or are unusual. This classification is typically used when diagnostic data is incomplete or when the cancer has spread to an area not commonly associated with the primary tumor. While the initial cause of the abnormal cell growth is not always known, it's often linked to environmental, lifestyle and genetic risk factors. Common symptoms vary but may include unexplained weight loss, fatigue, and pain at the affected site. Over time, these conditions can progress to affect normal bodily functions, disrupting the affected body systems. It’s important to note that the presentation and progression of these cancers may differ significantly depending on their specific type and location.