TY - JOUR TI - Primary Paraspinal Hydatid Cyst in a Patient Presenting with Low Back Pain: A Case Report AU - Raoulis, V. AU - Mitrousias, V. AU - Malahias, M.-A. AU - Stofas, A. AU - Fyllos, A. AU - Malizos, K.N. JO - JBJS Case Connector PY - 2021 VL - 11 TODO - 1 SP - e20.00581 PB - NLM (Medline) SN - 2160-3251 TODO - 10.2106/JBJS.CC.20.00581 TODO - null TODO - CASE: A 54-year-old man presented with low back pain and low-grade fever. Palpation revealed a focal mass of the lumbar region. Radiographs were normal, but magnetic resonance imaging demonstrated a multicystic mass at the level of L2-L4. The initial diagnosis of a hydatid cyst was confirmed after surgical excision. CONCLUSION: Although primary paraspinal hydatidosis is rare, physicians should be aware of it when dealing with patients suffering from low back pain combined with red-flag symptoms. Especially in rural regions or areas where populations live in close proximity to host animals, primary paraspinal hydatidosis should be included in the differential diagnosis. Copyright © 2021 by The Journal of Bone and Joint Surgery, Incorporated. ER -