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Diagn Cytopathol. 2000 Mar;22(3):176-80.

Cytology of polypoid adenomyomas: a report of two cases.

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  • 1Department of Pathology, New York University Medical Center, New York, New York, USA.


Uterine polypoid adenomyomas, both typical and atypical variants, often arise in the lower uterine segment or endocervical canal as pedunculated polypoid masses that may be accessible for cytologic sampling. However, their cytologic findings have rarely been described in the literature. Two women in their reproductive age presented with abnormal vaginal bleeding. The cervicovaginal smear of the first patient contained sheets and strips of reactive endocervical cells in an inflammatory background. In addition, loose aggregates of spindle-shaped smooth muscle cells were also noted. The findings were consistent with those of a typical polypoid adenomyoma. The cervicovaginal smears of the second patient consisted of tightly packed, crowded clusters of glandular cells which were initially interpreted as atypical glandular cells, suspicious of adenocarcinoma. In retrospect, loose aggregates of smooth muscle stromal cells were noted. Subsequent curettage revealed an atypical polypoid adenomyoma. The cytologic findings of typical polypoid adenomyoma were nonspecific except for the presence of loose aggregates of smooth muscle cells. The cytologic features of an atypical polypoid adenomyoma may mimic that of a neoplastic glandular process. The findings of tightly packed clusters of glandular cells and loose aggregate of bland-appearing smooth muscle cells in premenopausal patients may suggest the diagnosis of atypical polypoid adenomyoma. Diagn. Cytopathol. 2000;22:176-180.

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