Twenty‐eight years old female who was presented with fewer and abdominal pain was admitted to ourhospital's emergency department (ED). The patient was hospitalized   with diagnosis of pneumoniabased on the tests performed at ED. She has been having shoulder and abdomen pain for one weekwithout a known history of the disease earlier in the story. Her body temparature was 38.9º C andpulmonary examination was normal. There was no abnormal findings  in her laboaratuary tests exceptthat; CRP was 9.1 mg/dl and HGB was 9.82 g/dL. Chest x‐ray revealed  almost homogeneous density inall zones, especially in the left lung field, but cardiac contour was protected. She did not have cough orsputum, and based on  her chest x‐ray findings, we decided to examine CT scan of the lungs, suspectinglung mass. CT report demonstrated   17x9x8 cm thick walled cystic lesion in the left lung and 20 cmcystic lesion covering the liver . The patient consulted with a thoracic surgeon with a preliminarydiagnosis of hydatic cyst. The patient underwent surgery by by the Thoracic Surgery Clinic. This casewas presented because of the late diagnosis, despite the precence of large cysts in the lung and liver.