Hydatid cyst disease is caused by the larval form of Echinococcus granulosus, and this parasitic infestation is an important health problem in endemic areas (Turkey, Middle Eastern countries, and South America). The lung and the liver are the most common sites of hydatidosis, but the parasite can be found in any part of the body except hair, teeth, and fingernails. Pulmonary hydatid cyst is sometimes mistaken for other pathologic processes according to location. We report the case of a surgically treated pulmonary hydatid cyst that clinically and radiologically mimicked Pancoast tumor.

ÖzetOtoimmün hastalıklar grubunda değerlendirilen, kronik, erozif ve inflamatuvar bir poliartrit olan romatoid artrit en sık görülen poliartrittir. Akciğer tutulumunun da eşlik ettiği bu inflamatuvar hastalık akciğer parankiminde metastazı taklit eden nodüllere yol açmakta ve tanıda zorluğa neden olmaktadır. Bu yazıda, bilinen romatoid artrit tanılı ve 15 yıldır tedavi gören 63 yaşında kadın olgu, akciğerindeki metastazı taklit eden romatoid nodülleri nedeniyle sunuldu. Tanı zorluğu olan bu olgularda tanısal amaçlı yapılan akciğer rezeksiyonu değerlendirildi.Anahtar Sözcükler: Romatoid artrit, metastaz, nodül. AbstractRheumatoid arthritis, classified in the autoimmune disease group, is a chronic, erosive, inflammatory, and the most frequently seen form of polyarthritis. This inflammatory disease, which is often accompanied by pulmonary involvement, can cause nodules to form in the pulmonary parenchyma that mimic metastasis, leading to difficulty in diagnosis. In this article, the case of a 63-year-old female patient with rheumatoid arthritis for 15 years and pulmonary rheumatoid nodules mimicking pulmonary metastasis is described. Diagnostic pulmonary resection is criticized for those patients who are difficult to diagnose.