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Imaging features and biopsy yield of soft tissue metastatic lesions: 10-year single tertiary center experience

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Abstract

Objective

To evaluate imaging features of soft tissue metastases, technical factors associated with diagnostic yield of image-guided biopsy, and clinical impact of biopsy results on patient outcomes.

Materials and methods

A total of 1605 image-guided soft tissue biopsies were retrospectively identified from December 2010 to December 2020. Included lesions were histologically proven musculoskeletal soft tissue metastases. Lesions were excluded if intraabdominal, intrathoracic, retroperitoneal, associated with osseous lesions or surgical scar implants or arising from skin or lymph nodes. Image guidance modality, needle size, number of cores, and lesion location, size, and depth from skin were recorded. Patient demographics, malignancy history, biopsy-driven changes in management, and survival rate after biopsy were collected.

Results

Forty-six patients met the inclusion criteria with a biopsy diagnostic yield of 44/46 (95.7%). Metastases were most commonly located truncal (82.6%, p < 0.001) and intramuscular (78.3%, p < 0.001). A total of 37/46 (80.4%) biopsies were US-guided. And 9/46 (19.6%) were CT-guided. There was no significant difference in the number of cores or mean needle gauge between diagnostic and nondiagnostic biopsies. At time of review, 23 (50%) patients were deceased, with a mean survival of 13.5 months after biopsy. The majority (71.7%) of patients had a known primary malignancy at time of biopsy, most commonly lung (24.2%) and breast (24.2%). Overall survival showed no association with anatomic location (p > 0.83) or tissue type (p > 0.34). The most common biopsy-driven outcome was initiation of chemotherapy, immunotherapy, and/or radiotherapy (52.2%).

Conclusion

Image-guided biopsy for soft tissue metastases has high diagnostic yield and commonly influences clinical management. Metastases were most commonly intramuscular in the trunk and are associated with poor prognosis.

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Authors and Affiliations

  1. Department of Radiology, NYU Langone Medical Center, New York University, 550 1st Ave, New York, NY, 10016, USA

    Marisa Ilag, Christopher Burke, William R. Walter & Mohammad Samim

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  1. Marisa Ilag
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  2. Christopher Burke
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Correspondence to Marisa Ilag.

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Ilag, M., Burke, C., Walter, W.R. et al. Imaging features and biopsy yield of soft tissue metastatic lesions: 10-year single tertiary center experience. Skeletal Radiol 52, 705–714 (2023). https://doi.org/10.1007/s00256-022-04197-0

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