Tehran University of Medical Sciences Basic & Clinical Cancer Research 2228-6527 7 4 2016 06 11 Advanced Giant cell tumor of Right Antero-lateral Chest wall, at Pregnancy 24 28 EN Farhad Samiei Department of Radiotherapy, Cancer Institute of Tehran, Tehran, Iran Afsaneh Alikhassi Department of Radiology, Cancer Institute of Tehran, Tehran, Iran Zahra Sedighi Cancer Research Center, Cancer Institute of Tehran, Tehran, Iran Alireza Ghannadan Department of Pathology, Cancer Institute of Tehran, Tehran, Iran Mohammad-Ali Mohagheghi Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran 2016 03 24 2016 05 29 We report occurrence of a rare case of Giant Cell Tumor (GCT), in a 28-year old woman, arising from anterior arc of right 6th rib during pregnancy. It progressed rapidly during breast-feeding period, mimicking malignant bone tumor at delayed presentation.    https://bccr.tums.ac.ir/index.php/bccrj/article/view/188 https://bccr.tums.ac.ir/index.php/bccrj/article/download/188/01