Pitfalls and Caveats in Applying Chromogenic Immunostaining to Histopathological Diagnosis

Area of Science:

• Histopathology and Diagnostic Pathology
• Molecular Pathology and Biomarker Analysis

Background:

• Chromogenic immunohistochemistry (IHC) is a cornerstone technique in histopathology for disease analysis and diagnosis.
• IHC is crucial in evaluating neoplastic lesions, providing insights into histogenesis, behavior, therapeutic targets, and prognostic biomarkers.
• Advancements in IHC technology, antibody availability, and molecular targeted therapy necessitate refined and reproducible immunostaining methods.

Purpose of the Study:

• To review essential devices, technical strategies, and troubleshooting guidance for performing reliable chromogenic immunohistochemistry.
• To address common pitfalls and caveats in immunostaining, including false positivity and false negativity, to enhance diagnostic accuracy.

Main Methods:

• Review of current literature and best practices in chromogenic immunohistochemistry.
• Description of relevant instrumentation and reagents used in immunostaining.
• Analysis of common technical challenges and strategies for mitigation.

Main Results:

• Immunohistochemistry is indispensable for detailed analysis of neoplastic lesions, aiding in diagnosis and treatment planning.
• Consistent and accurate immunostaining requires adherence to optimized protocols and awareness of potential technical issues.
• Understanding and avoiding false-positive and false-negative results are critical for reliable histopathological interpretation.

Conclusions:

• This review provides practical insights and troubleshooting advice for pathologists to optimize chromogenic immunohistochemistry.
• Adoption of recommended techniques and careful attention to detail can improve the reproducibility and diagnostic utility of immunostaining.
• Continuous learning from errors and refining protocols are essential for advancing histopathological diagnosis.