Cytologic Diagnosis: Numerous benign glandular cells present consistent with vesico-vaginal fistula. The glandular cells are arising from cystitis glandularis.
Cytologic Features: The pap test shows numerous columnar cells, with basally located bland nuclei (Figures 1-5). The nuclear to cytoplasmic ratio is low. There is no nuclear hyperchromasia. Inconspicuous nucleoli are observed. The cytoplasm is delicate, fluffy and rare vacuoles are observed, indicating glandular origin. There are no cilia or terminal bars present in any of the columnar cells. Metaplastic and atrophic squamous cells are observed in the otherwise clean background.
Discussion: The presence of benign glandular cells on a Pap smear from women after undergoing a total hysterectomy can range from 1% to 13%. The most common and well known reasons for this are: a wrong history (supra-cervical hysterectomy or no hysterectomy), vaginal adenosis, metaplasia, endometriosis, fallopian tube prolapse, primary or metastatic adenocarcinoma and fistulas. Glandular cells that cytologically don't resemble endocervical cells can be present as a result of fistulas. The patient's clinical history and correlation with radiologic findings are important in determining the exact origin of such glandular cells. In a case of vesico-vaginal fistula benign urothelial cells, umbrella cells or columnar shaped glandular cells (i.e. cystitis glandularis or other metaplastic changes of the urothelium) can be seen on Pap smears, whereas in recto-vaginal fistula columnar appearing cells are noted forming rosette-like glands or sheets with goblet cells associated with a dirty background.
n this particular patient a PET scan obtained 2 years following completion of radiation therapy showed a crescent shaped fluid collection within the vaginal cuff with absence of tracer filling in the bladder, consistent with a widely patent vesicovaginal fistula. The patient also complained of urinary leakage. We concluded that the origin of the benign glandular cells on this Pap test are from the urinary bladder. The abundance of columnar cells in this case are most likely arising from cystitis glandularis, a benign metaplastic change observed in the urinary bladder. These cells are distributed singly, rather than in a honeycomb or picket fence arrangement, which would be more characteristic of endocervical cells. In view of the patient's clinical history of having undergone a total hysterectomy, it would be unusual to encounter a vaginal cuff smear with a predominance of endocervical cells.
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Acknowledgement: Krisztina Z. Hanley M.D., and Talaat S. Tadros M.D.
Emory University Hospital and Grady Memorial Hospital , Atlanta , GA