Perikardiyal mezotelyal inkluzyon kistleri, aberran yerlesimli olan ve colomik bosluktan koken alan genellikle benign toraks ici lezyonlardir. Asemptomatik olmalarina karsin, buyuk boyutlara ulasip komsu yapilari enfekte edebilir veya bu yapilara basi yapabilir. Tani siklikla gogus rontgeni ile tesadufen konur. Bu yazida, nefes darligi ve bacaklarda sislik yakinmasi ile basvuran ve cekilen gogus rontgeninde parakardiyak kitle tespit edilen 57 yasinda bir kadin hasta, literatur verileri esliginde sunuldu. Anah tar soz cuk ler: Inkluzyon kisti; parakardiyak kitle; torakotomi. Pericardial mesothelial inclusion cysts are usually benign intrathorasic lesions, which locate aberantly and originate from coelomic space. Despite asymptomatic nature, they may infect or compress to the adjacent structures in larger sizes. The diagnosis is usually made coincidentally by chest X-ray. In this article, we present a 57-year-old female case who was admitted with the complaints of dyspnea and swollen legs and in whom a paracardiac mass was detected by chest X-ray radiography in the light of literature data.