The effect of processing on liver biopsy core size.

Area of Science:

• Histopathology
• Gastroenterology
• Surgical Pathology

Background:

• Liver biopsy is essential for diagnosing liver diseases.
• Accurate interpretation relies on obtaining adequate tissue core size.
• Processing steps can alter the original biopsy dimensions.

Purpose of the Study:

• To quantify changes in liver biopsy core size during processing.
• To assess the impact of the biopsy cartridge and formalin fixation on specimen dimensions.
• To inform clinicians about potential size discrepancies.

Main Methods:

• 61 percutaneous liver biopsies using a 16-gauge automatic tru-cut needle were analyzed.
• Biopsy core dimensions were measured in the cartridge, on a tray, and after formalin fixation.
• Statistical analysis was performed to compare mean sizes at each stage.

Main Results:

• The mean biopsy core size was 15 mm in the cartridge, 19.6 mm on the tray, and 18.3 mm after fixation.
• The cartridge caused a 23% compression, and formalin fixation resulted in 7% shrinkage.
• All size measurements showed statistically significant differences.

Conclusions:

• Liver biopsy core size undergoes significant alterations throughout processing.
• Awareness of these dimensional changes is vital for procedural decision-making.
• Underestimation of size in the cartridge may lead to redundant biopsies.