A case report on pulmonary metastasis of giant cell tumor mimicking arteriovenous malformation oleh Niloofar Ayoobi Yazdi, MD, Sara Parviz, MD, Sina Delazar, MD, Sina Azadnajafabad, MD, MPH, Samira Aleseidi, MD, Hana Saffar, MD, Nahid Sadighi, MD