Persistent low back pain as the only clinical symptom of hematocolpos

Low back pain is common in children and adolescents. Most of those cases have a benign, transitory and mechanical origin. We present the case of a 12-year-old patient with persistent low back pain as the only symptom of hematocolpos due to imperforate hymen. The hymenectomy completely resolved the low back pain. Due to its rarity, pediatricians do not usually think about this possibility, so we propose that in a case of an adolescent with an adolescent with persistent low back pain and apparent primary amenorrhea, it is necessary to think about the diagnosis of hematocolpos due to imperforate hymen.