Ultrasound-guided percutaneous needle biopsy excellent for small pleural lesions diagnosis

Ultrasound-guided percutaneous needle biopsy excellent for small pleural lesions diagnosis
Enhanced axial CT (A) shows diffuse pleural thickening (arrow) with a maximum thickness of 3.17 mm. US image for the corresponding lesion on CT (B) shows diffuse pleural thickening (arrowheads) with a maximum thickness of 3.25 mm. The needle pathway length, measured as the needle length through the pleural lesion, was 6.54 mm (asterisk). Pleural puncture angle (exact value not indicated) is depicted as the angle between the outer line of the pleura and the biopsy needle (thin arrow). Credit: American Roentgen Ray Society (ARRS), American Journal of Roentgenology (AJR)

According to an open-access article in ARRS' American Journal of Roentgenology (AJR), ultrasound (US)-guided percutaneous pleural needle biopsy (PCPNB) has excellent diagnostic accuracy for small pleural lesions.

"US-guided PCPNB is highly likely to be diagnostic for small pleural with nodular morphology on CT or US, or with pleural thickness—4.5 mm," explained Jongmin Park and colleagues from South Korea's Kyungpook National University.

To determine the diagnostic yield of US-guided PCPNB for small (? 2 cm) pleural lesions and the impact of CT and US morphologic and technical factors, Park's team retrospectively studied 103 patients (73 men, 30 women; mean age, 60.8) who underwent US-guided PCPNB of a small pleural lesion by a single experienced operator from July 2013 to December 2019. Histopathological results established final diagnosis, including from repeat US-guided and CT-guided biopsies, as well as imaging and clinical follow-up. CT and US assessed pleural morphology and thickness, while US measured needle pathway length throughout the pleura.

Summarizing their results, Park et al. noted: "[US-guided PCPNB] of small pleural lesions had a diagnostic accuracy of 85.4%. The yield was 96.4% for nodular CT lesions, 95.0% for diffuse CT lesions with thickness ?4.5 mm, 55.6% for diffuse CT lesions with thickness."

In this AJR Podcast, Yoon-Jin Kim, MD discusses a study evaluating the diagnostic yield of ultrasound-guided percutaneous biopsy of small pleural lesions. Important findings include that the technique is safe and fairly high yield for lesions 20 mm or less and that features such as nodular. Credit: American Roentgen Ray Society (ARRS), American Journal of Roentgenology (AJR)

Repeating their assessments on both CT and US 2 weeks later yielded the following representative measurements:

  • 82-Year-Old Man Diagnosed With Tuberculous Pleurisy on US-Guided PCPNB (see image)
  • 84-Year-Old Man Diagnosed with Pleural Metastasis From Lung Adenocarcinoma on US-Guided PCPNB (see image)

"In multivariable analysis," the authors of this AJR article concluded, "pleural morphology on US and needle pathway length through the pleura independently predicted diagnostic yield," adding that if the pleura is nodular or thicker than 4.5 mm on CT, US-guided PCPNB is justifiable as an initial or repeat .

Ultrasound-guided percutaneous needle biopsy excellent for small pleural lesions diagnosis
Enhanced axial CT (C) shows nodular pleural thickening (arrows). US image for the corresponding lesion on CT (D) shows nodular pleural morphology (arrowheads). Distance from skin to pleura, measured as the perpendicular distance between the skin and the pleural puncture site, was 14.04 mm. Credit: American Roentgen Ray Society (ARRS), American Journal of Roentgenology (AJR)

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More information: Jongmin Park et al, Ultrasound-guided Percutaneous Needle Biopsy for Small Pleural Lesions: Diagnostic Yield and Impact of CT and Ultrasound Characteristics, American Journal of Roentgenology (2020). DOI: 10.2214/AJR.20.24120
Citation: Ultrasound-guided percutaneous needle biopsy excellent for small pleural lesions diagnosis (2020, November 6) retrieved 4 December 2020 from https://medicalxpress.com/news/2020-11-ultrasound-guided-percutaneous-needle-biopsy-excellent.html
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