Quiste perineural simulando masa anexial en estudio de paciente infértil

Abstract

Perineural or Tarlov cysts are usually detected as incidental findings during an imaging study and do not require treatment unless symptomatic. The incidence of perineural cysts in the general population is low. Because these cysts simulate other cystic lesions of the pelvis, their low incidence may be due to diagnostic error.We present the case of a 38-year-old woman who was under investigation for primary infertility. An ultrasound scan revealed a 4-cm pelvic cystic lesion, situated medially and apparently independently from the annexes and uterus. Subsequently, the embryos were vitrified and were sent to the internal medicine and neurosurgery services for examination.The abdominopelvic CT scan showed the presence of cystic formations in the intervertebral foramina of sacrum, which were confirmed by magnetic resonance imaging. These formations were compatible with a diagnosis of extradural meningeal cyst.Because the patient was asymptomatic, we decided to provide conservative treatment. The patient was referred back to the fertility unit to complete the fertility treatment.