A Rare Case and Atypical Metastatic Regions, Pulmonary Giant Cell Carcinoma/Nadir Olgu ve Atipik Metastatik Bolgeler, Pulmoner Dev Hucreli Karsinom

Sixty two years old man referred to our clinic due to suspicion of thymic mass. The hypermetabolic nodular lesion in the right lung upper lobe was seen in [.sup.18]F-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography (PET/CT) in addition to the mass in the anterior mediastinum which was found to without malignancy. The patient underwent wedge resection and final diagnosis was pulmonary giant cell carcinoma. In follow-up [.sup.18]F-FDG PET/CT multiple lesions with pathological activity were observed in the cerebrum, right postauricular region, bilateral adrenal, stomach, pancreas, pelvic soft tissue, mesenteric, left femur and bilateral lung parenchyma 6 months after. The pathology results of the right frontal, pelvic mass and the postauricular region were metastasis. Keywords: Primary pulmonary giant cell carcinoma, [.sup.18]F-FDG PET/CT, atypical metastasis Altmis iki yasinda hasta timik kitle nedeniyle klinigimize basvurdu. Yapilan [.sup.18]F-florodeoksiglukoz (FDG)-pozitron emisyon tomografi/bilgisayarli tomografide (PET/BT) anterior mediasten yumusak doku kitlesine ek olarak sag akcigerde hipermetabolik noduler lezyon izlendi. Akciger rezeksiyon sonrasinda pulmoner dev hucreli karsinom tanisi aldi. Takip [.sup.18]F-FDG PET/BT'sinde beyin, sag postaurikuler, bilateral adrenal, mide, pankreas, pelvik yumusak doku, mezenterik, sol femur ve bilateral akciger parankiminde multipl patolojik aktiviteli lezyon gozlendi. Bunlardan sag frontal, pelvik kitle ve postaurikuler yerlesimli lezyonlarin histopatolojisi metastatik olarak sonuclandi. Anahtar kelimeler: Primer pulmoner dev hucreli karsinom, [.sup.18]F-FDG PET/BT, atipik metastaz