Defining the Cervical Transformation Zone and Squamocolumnar Junction: Can We Reach a Common Colposcopic and...

Area of Science:

• Gynecologic pathology
• Colposcopy
• Cervical cancer screening

Background:

• Standardized terminology and reporting are essential for quality assurance in colposcopy and cervical pathology.
• Current clinical and histologic definitions of the cervical transformation zone (TZ) and squamocolumnar junction (SCJ) exhibit considerable variation.

Purpose of the Study:

• To identify areas of agreement and disagreement in the definitions of the TZ and SCJ among experts.
• To guide future efforts in standardizing colposcopic and histologic terminology.

Main Methods:

• A survey was conducted among board members of the European Federation of Colposcopy and members of the International Society of Gynecological Pathologists.
• Responses were collected from 22 expert colposcopists and 34 gynecologic pathologists.

Main Results:

• Broad agreement was reached that the TZ is the area of squamous metaplasia.
• Consensus was established that the original SCJ can be histologically identified by the last cervical gland, and the new SCJ is the border between metaplastic squamous epithelium and surface columnar epithelium.
• Areas requiring further work include the classification of cervical crypts within the TZ and the definition of the new SCJ at the microscopic level of glandular crypts.

Conclusions:

• This study represents a significant step towards standardizing definitions of the TZ and SCJ.
• Further research and consensus-building are needed to address specific ambiguities in current definitions.
• Standardization will enhance the reliability of colposcopy and cervical pathology reporting.