Colon adenocarcinoma metastasis to soft tissue of the wrist with heterotopic bone formation: a case study

It is uncommon in clinical practice to discover cancer as either a metastasis within soft tissue or containing heterotopic bone formation. These rarities are documented primarily through case reports in the literature. This report describes a patient with colon cancer whose painful wrist lesion was proven to exhibit both of these unusual features. It is important to recognize soft tissue metastases, as these are managed differently than a carcinosarcoma, for instance. In addition, although heterotopic bone formation does not alter the prognosis or management of colon cancer, it can prove a valuable starting point for understanding carcinogenesis.