Fig. 1From: Multiple primary synchronous malignant tumors Top left panel Axial non-contrast CT scan shows no significant mediastinal, hilar and axillary lymphadenopathy. Bottom left panel Axial non-contrast lung window setting CT shows a solid nodule at the upper segment of right lower lobe. Right panel Coronal view whole-body PET scan shows focal uptake of at the upper segment of right lower lobe, sigmoid colon and prostate glandBack to article page