International Journal of Case Reports and Images (IJCRI) is an international, peer reviewed, monthly, open access, online journal, publishing high-quality, articles in all areas of basic medical sciences and clinical specialties.Aim of IJCRI is to encourage the publication of new information by providing a platform for reporting of unique, unusual and rare cases which enhance understanding of disease process, its diagnosis, management and clinico-pathologic correlations. Case Report: A 40-year-old female referred to us suffering from painful spastic weakness of lower limbs, her condition started six months earlier to admission and she became paraplegic for last four months with loss of bladder and bowel control. She had L4, L5 lumbar laminectomy four months earlier as she was diagnosed as lumbar prolapsed intervertebral disc. After a thorough diagnostic workup, it was provisionally found that she has a malignant posterior mediastinal mass, but surprisingly only intraoperatively we discovered that she had only a posterior mediastinal hydatid cyst, which had been treated accordingly.
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Conclusion:Hydatid cyst may speculate all types of thoracic tumors so high index of suspension should be considered in treating thoracic tumors in an endemic area.