Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 21 01 2026 05 19 125 129 Kadir Çorbacı Osmaneli Mustafa Selahattin Çetintaş State Hospital Cebrail Akyuz Haydarpasa Numune Training and Research Hospital 2025 07 11 Purpose: Cystic echinococcus (CE) is an important health problem affecting societies living especially in rural areas. Case Presentation:  Our patient is a 64-year-old male who received PAIR treatment and albendazole treatment due to CE. The patient was first operated on for lung cancer. After treatment, the patient continues to live asymptomatically in the 36-month follow-up. Conclusion: In this case, we observed and followed up that the paxlitaxel and carboplatin treatments received by our patient caused regression in the CE lesions.  We think that the effectiveness of this situation should be evaluated first with experimental studies. https://ijpa.tums.ac.ir/index.php/ijpa/article/view/4677 https://ijpa.tums.ac.ir/index.php/ijpa/article/download/4677/1486