Quality Assurance in Histopathology Laboratory: A Comparative Study of Tissue Processing Techniques

Background: Quality assurance in histopathology laboratories is essential for maintaining diagnostic accuracy, reproducibility, and timely reporting. Tissue processing is a critical pre-analytical step that directly influences tissue morphology and staining quality. Rapid tissue processing techniques have been introduced to reduce turnaround time while maintaining acceptable histological quality. The objective is to compare conventional and rapid tissue processing techniques with respect to tissue morphology, staining quality, diagnostic adequacy, processing artifacts, and turnaround time as part of quality assurance in a histopathology laboratory. Material and Methods: A prospective comparative observational study was conducted on 200 formalin-fixed tissue specimens. Each specimen was processed using conventional and rapid tissue processing techniques. Histological sections were evaluated for nuclear detail, cytoplasmic staining, tissue architecture preservation, sectioning quality, staining uniformity, processing artifacts, diagnostic adequacy, and overall quality score. Processing time and reporting turnaround time were also compared. Statistical analysis was performed using SPSS version 25.0, with a p-value <0.05 considered statistically significant. Results: Conventional tissue processing demonstrated slightly superior nuclear and cytoplasmic preservation and higher overall quality scores. However, rapid tissue processing achieved 97% diagnostic adequacy, with comparable tissue architecture preservation and minimal processing artifacts. The rapid technique significantly reduced mean tissue processing time (5.2 ± 0.8 hours) compared with conventional processing (14.6 ± 1.2 hours) and markedly shortened reporting turnaround time (15.8 ± 1.9 hours vs. 26.4 ± 2.5 hours, p<0.001). Most histological quality parameters showed no statistically significant differences between the two techniques. Conclusion: Rapid tissue processing yields tissue of histological quality and is adequate for diagnosis with a much shorter turnaround time in the laboratory. The use of proven rapid tissue processing methods in a quality assurance scheme can enhance the efficiency of the laboratory without compromising diagnostic quality.

Keywords: Used are Quality assurance, histopathology, tissue processing, rapid tissue processing, laboratory quality management, diagnostic adequacy and turnaround time.