Genital tract bleeding in prepubertal girls is a rare clinical condition, which can occur for multiple reasons. It frequently generates anxiety in the family and in health care professionals. A thorough anamnesis and careful genital inspection can give important diagnostic hints; however, there are cases in which the cause remains doubtful and a complete gynecological evaluation (including cultures and vaginoscopy) is necessary. Therefore, the attending physician should always consider less frequent diagnoses in order to perform the necessary studies in a sequential and rational manner. We present the case of a preschool girl with vaginal bleeding due to pinworm endometritis, which, to our knowledge, has never been reported before as a cause of genital bleeding in prepubertal girls.

青春期前女孩的生殖道出血是一种罕见的临床疾病，可能由于多种原因而发生。它经常在家庭和医疗保健专业人员中引起焦虑。彻底的记忆检查和仔细的生殖器检查可以提供重要的诊断提示；但是，在某些情况下，原因仍然值得怀疑，因此有必要对妇科进行全面评估（包括培养和阴道镜检查）。因此，主治医师应始终考虑较不频繁的诊断，以便以顺序和合理的方式进行必要的研究。我们介绍了一个由于pin虫子宫内膜炎而阴道流血的学龄前女孩的病例，据我们所知，以前从未报道过这种疾病是青春期前女孩生殖器出血的原因。