There Is A Normal Sized Non-gravid Anteverted Uterus Measuring 68.8mm

There is a normal sized non-gravid anteverted uterus measuring 68.8mm x30.5mm X5o.2mm with uniform myometrium and normal midline echo.there are no adnexal masses but there is significant pelvic fluid collection.both ovaries are unremarkable.conclusion _pelvic inflammaTory disease.what did it mean