Abstract
Skeletal muscle metastasis of pancreatic cancer is very rare and only 3 cases have been reported in Japanese literature. We reported a case of metastasis to the quadriceps femoris muscle after resection for pancreatic cancer 8 years earlier. A 66-year-old man underwent pancreaticoduodenectomy with portal vein excision in December 1993 due to pancreatic head cancer. In May 2002 he noticed a painful, 3×2cm tumor in the right femoral region. Based on a diagnosis of recurrent pancreatic cancer in the skeletal muscle because tumor markers such as CA19-9 and SPan1 had increased, we excised the tumor under local anesthesia. The tumor was well-differentiated tubular adenocarcinoma in the collagenous tissue. The man suffered lung metastasis 6 months later and died in February 2004, 11 years and 2 months after primary pancreatic tumor excision. Metastatic tumor must thus be considered when a skeletal muscle tumor is seen in a patient with a history with pancreatic carcinoma.
