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Atlas Interpretation:
Interpreted image
Type of Preparation:


NILM: Tubal metaplasia

Cytomorphologic Criteria:
Columnar endocervical cells derived from tubal metaplasia may occur in small groups or as pseudostratified, often crowded groups. Nuclei are round to oval and may be enlarged, pleomorphic and hyperchromatic. Chromatin is evenly distributed and nucleoli are usually not seen. The N/C ratio can be high.

Explanatory Notes:
It is important to recognize that enlarged and/or crowded nuclei and nuclear stratification may lead to an interpretation of atypical endocervical cells. The identification of terminal bars and cilia is important in correctly classifying this pattern of endocervical cells as NILM and not as atypical endocervical cells.

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