A Case of Pyocolpos in a Postmenopausal Woman With a History of Lichen Sclerosus and Postmenopausal Bleeding.

Pyocolpos refers to the buildup of pus within the vaginal cavity. Pyocolpos in the background of lichen sclerosis and postmenopausal bleeding (PMB) has not been previously described. A 69-year-old para 3 patient presented with a history of PMB with a long-standing history of lichen sclerosis. The vaginal examination was impossible due to vaginal adhesions. Vulval appearances revealed the loss of the clitoral architecture. Further imaging revealed an endometrial thickness of 4-5 mm, a focal abnormality within the posterior ectocervix compatible with a hemorrhagic cystic lesion distending the posterior fornix, and some free fluid within the pelvis. A hysteroscopy was abandoned as the vagina was completely obliterated. After a multidisciplinary assessment, the patient had a total abdominal hysterectomy, and the presence of a pyocolpos was noticed at the opening into the vault. We could not find any previous case reports of pyocolpos that are associated with lichen sclerosus. The long-standing history of lichen sclerosus may have caused an obstruction of the outflow tract, which was secondarily infected and slowly progressed into the formation of pyocolpos. Other management options could have been explored if the diagnosis of pyocolpos had been made preoperatively. Pyocolpos should be considered in patients with a history of a long-standing lichen sclerosus who present with abdominal pain and a pelvic mass on imaging.