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Unsuspected metastases presenting as solitary soft tissue lesions: a fourteen-year review

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Skeletal Radiology Aims and scope Submit manuscript


Objective. To describe a series of patients with no known primary malignancy who presented with a solitary unsuspected soft tissue metastasis masquerading as a soft tissue sarcoma, and secondarily to describe the imaging appearance of these lesions.

Design. Records of two academic hospitals with active orthopedic oncology services were reviewed for patients meeting the above criteria. Clinical charts were examined, and the imaging appearance of the soft tissue lesions retrospectively reviewed.

Patients. Of 1421 patients examined for soft tissue lesions, 11 were found who met the above criteria.

Results. Of the 11 patients whose initial presentation was a solitary soft tissue metastasis, eight were found to have a primary lung cancer, two were diagnosed with adenocarcinoma of unknown primary, and adenocarcinoma of the colon was discovered in the remaining patient.

Conclusions. The clinical presentation of a solitary soft tissue metastasis without a known primary malignancy is a rare occurrence, with an incidence of approximately 0.8%. Lung cancer is the primary neoplasm in a high percentage of these cases.

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Received: 13 Oktober 1999 Revision requested: December 1999 Revision received: 25 January 2000 Accepted: 28 January 2000

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Glockner, J., White, L., Sundaram, M. et al. Unsuspected metastases presenting as solitary soft tissue lesions: a fourteen-year review. Skeletal Radiol 29, 270–274 (2000).

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