Endometrial plasma cells: do they indicate subclinical pelvic inflammatory disease?

Subclinical pelvic inflammatory disease (PID) is a common condition among women with lower genital tract infection and is believed to be responsible for a greater proportion of PID-related sequelae than acute PID. Subclinical PID is diagnosed histologically after endometrial biopsy. In the literature, many different histologic criteria have been used to define subclinical PID.

To determine if endometrial plasma cells are commonly found in women at low likelihood of PID.

A cross-sectional study of 33 women undergoing tubal ligation and at low likelihood of PID was performed. At the time of tubal ligation, study participants underwent visualization of pelvic organs and an endometrial biopsy, which was analyzed for the presence of neutrophils and plasma cells. Demographic, clinical, and microbiologic data were compared among women with and without endometrial plasma cells.

Endometrial plasma cells were identified in one third (33%) of the asymptomatic, fertile, healthy women in our cohort. The presence of plasma cells was not associated with lower genital tract infection, including bacterial vaginosis. Laparoscopic evidence of fallopian tube damage was similar in patients with and without endometrial plasma cells (22% in each group).

Plasma cells are commonly found in the endometria of healthy women and may not represent upper genital tract inflammation.