Is breast specimen shrinkage really a problem in breast-conserving surgery?

Area of Science:

• Oncology
• Pathology
• Surgical Science

Background:

• Breast-conserving surgery outcomes depend on margin clearance and excision volume.
• Accurate assessment of these parameters is crucial for oncological and cosmetic results.

Purpose of the Study:

• To quantitatively evaluate discrepancies in surgical and pathological estimates of breast specimen sizes.
• To assess the influence of formalin fixation on specimen dimensions.

Main Methods:

• Prospective multicentre study of 68 breast specimens from breast-conserving surgery.
• Specimen weight and volume (calculated and by displacement) measured immediately post-excision and post-fixation.
• Comparison of pre- and post-fixation tumor-free margin distances.

Main Results:

• Specimen weights remained consistent from surgery to pathology.
• Calculated specimen volumes significantly differed from actual volumes measured by displacement.
• Formalin fixation did not alter the distance to the closest tumor-free margin.

Conclusions:

• No significant shrinkage of surgical breast specimens occurs between surgery and pathology or after formalin fixation.
• Pathological appraisal of margins and volumes is not affected by changes in specimen size.
• Accurate volume measurement requires water displacement or specimen weight; pathologists should record specimen weight.