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Computed tomography-guided retroperitoneal biopsies.

M Knelson1, J Haaga, H Lazarus

  • 1Department of Radiology, University Hospitals of Cleveland, OH 44106.

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|August 1, 1989
PubMed
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The 14-gauge Tru-Cut needle is more effective for retroperitoneal biopsies than the 20-gauge Chiba needle, offering higher diagnostic accuracy for metastatic disease and lymphoma. Complications were minimal with both needles.

Area of Science:

  • Medical procedures
  • Diagnostic imaging
  • Surgical pathology

Background:

  • Retroperitoneal masses require accurate diagnosis for effective treatment.
  • Computed tomography (CT)-guided biopsy is a common method for diagnosing retroperitoneal lesions.
  • Different needle types may yield varying diagnostic success rates and complication profiles.

Purpose of the Study:

  • To compare the diagnostic accuracy and complication rates of 20-gauge Chiba and 14-gauge Tru-Cut needles in CT-guided retroperitoneal biopsies.
  • To evaluate the effectiveness of each needle type in diagnosing metastatic disease, lymphoma, and benign disorders.

Main Methods:

  • Retrospective review of consecutive patients undergoing CT-guided retroperitoneal biopsy.
  • Biopsies performed using either a 20-gauge Chiba needle or a 14-gauge Tru-Cut needle.

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  • Diagnostic outcomes determined by chart review, surgical, and autopsy results.

    • Main Results:

    • The 14-gauge Tru-Cut needle achieved a correct diagnosis in all 13 cases of metastatic disease, 10 of 11 lymphoma cases, and 2 of 2 benign disorder cases.
    • The 20-gauge Chiba needle accurately suggested diagnoses in 20 of 22 metastatic disease cases and 10 of 15 lymphoma cases.
    • The 14-gauge needle enabled specific lymphoma subtyping in 10 of 11 cases, which was not possible with the 20-gauge needle.

    Conclusions:

    • The 14-gauge Tru-Cut needle demonstrates superior diagnostic performance for retroperitoneal masses compared to the 20-gauge Chiba needle.
    • Both needles are associated with low complication rates, with only a minor subcutaneous hematoma reported.
    • CT-guided biopsy with larger gauge needles like the Tru-Cut may be preferred for achieving specific diagnoses in retroperitoneal lesions.