Abstract
Early detection of endocervical adenocarcinoma is especially important for cancers that are human papillomavirus (HPV) negative. We investigated the clinicopathologic significance of yellow gastric-type mucin observed on Papanicolaou smears. We described "atypical endocervical cells with gastric-type mucin" (AEC-GAM) when yellow mucin was observed in endocervical cells. We retrieved AEC-GAM samples from 58,752 cervical smears performed at Yamanashi University Hospital during our study period and reviewed clinical, cytologic, and pathologic features. We detected AEC-GAM in 172 (0.29 %) smears from 65 patients, and 41 of these 65 patients were histologically diagnosed with lobular endocervical glandular hyperplasia (LEGH) (43%) or pyloric gland metaplasia (20%). The prevalence of adenocarcinoma was 25% (7/28) in LEGH cases and 11% (7/65) in AEC-GAM smears. Yellow mucin is a diagnostic clue for endocervical glandular lesions with gastric differentiation. We recommend describing AEC-GAM on cytologic reports to improve cytologic screening for HPV-negative cervical cancers.
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