Four cases of intramuscular metastasis of carcinoma are reported. The
preoperative clinical diagnosis of all four cases was soft-tissue sarc
oma. Definitive diagnoses, made by open biopsy, were uterine carcinoma
, gastric carcinoma, lung carcinoma, and hypopharyngeal carcinoma. All
patients died from lung, liver, or brain metastasis several months af
ter open biopsy despite surgery, chemotherapy, or radiation therapy. C
ase reports of macroscopic metastases to muscle are rare, and the auth
ors report four such cases experienced during a 15-year period.