Skeletal muscle metastases of carcinoma: A clinicopathological study of 12 cases

Yilihamu Tuoheti, Kyoji Okada, Toshihisa Osanai, Jun Nishida, Shigeru Ehara, Manabu Hashimoto, Eiji Itoi

Research output: Contribution to journalArticlepeer-review

118 Citations (Scopus)


Objective: To clarify the clinical and magnetic resonance (MR) imaging features of a rare condition of metastasis of carcinoma to skeletal muscle. Method: Clinicopathological findings for 12 patients (10 male, two female, age range 48-89 years, mean age 68 years) with skeletal muscle metastases of carcinomas were reviewed retrospectively. Results: In nine of the 12 patients the skeletal muscle metastasis was presented as 'painful mass'. The lung was found to be the most common primary source, accounting for 33% of the cases, and the lower extremity was the most common metastatic site, accounting for 67% of the current series. Diagnosis was made by biopsy in all cases. Overall, MR images were not specific, but on the gadolinium-DTPA enhanced MR images, extensive peritumoral enhancement associated with central necrosis was found in 11 of the 12 patients (92%). Seven patients died within 2-19 months (average: 9 months) after the detection of the skeletal muscle metastasis, among whom only one patient was continuously disease free for 92 months after wide excision of the metastatic lesion. Conclusion: Skeletal muscle metastasis is often presented as a painful mass in patients with known primary carcinoma. For diagnosis, needle biopsy is mandatory. However, a painful mass with an extensive peritumoral enhancement should be highly suspected to represent carcinoma metastasis to skeletal muscles. In selected patients, wide excision with combined chemotherapy could yield unexpectedly good results.

Original languageEnglish
Pages (from-to)210-214
Number of pages5
JournalJapanese journal of clinical oncology
Issue number4
Publication statusPublished - 2004 Apr 1
Externally publishedYes


  • Cancer
  • Magnetic resonance
  • Muscles
  • Neoplasms
  • Soft tissues

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research


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