PT - JOURNAL ARTICLE AU - AlRashed, Fahad M. AU - AlShahrani, Dayel A. TI - Infected pulmonary hydatid cyst AID - 10.15537/smj.2024.45.4.20230078 DP - 2024 Apr 01 TA - Saudi Medical Journal PG - 433--436 VI - 45 IP - 4 4099 - http://smj.org.sa/content/45/4/433.short 4100 - http://smj.org.sa/content/45/4/433.full SO - Saudi Med J2024 Apr 01; 45 AB - Echinococcosis is a parasitic infection that is distributed worldwide. Its clinical presentation depends on the size and location of the cyst. A 7-year-old was found with a superimposed infected pulmonary hydatid cyst that was initially misdiagnosed as complicated pneumonia. Our case underscores the challenges of diagnosing and managing echinococcosis, emphasizes the need for a high index of suspicion, and describes the disease’s ability to mimic other clinical entities.