Unsuspected Second Malignancy Detection by FDG PET Scan

作者：Agrawal Archi^*; Nair Narendra; Agrawal Ramesh; Baghel Nawab S

来源：Clinical Nuclear Medicine, 2008, 33(12): 868-869.

DOI：10.1097/RLU.0b013e31818bf170

• FDG
• PET
• second malignancy
• focal uptake
• rectum

A whole body F-18 FDG PET scan was done on a 45-year-old man with a small cell carcinoma of the left lung for a metastatic survey. Imaging showed intense uptake in the left lung (maximum standardized uptake value (SUV(max)) of 8.32 corrected for body weight), at the site of the primary and in the hilar lymph nodes. Focal intense uptake was also seen in the rectum (SUV(max) of 21.73 corrected for body weight). No anatomic imaging for the pelvis was done, as the patient had no bowel symptoms. Posttreatment PET scan done 9 months after the first scan showed significant reduction in the primary mass in the lung (SUV(max) 4.45) but an increase in the rectal mass (SUV(max) 83.22). He now complained of bleeding per rectum. Colonoscopy and CT scan of the abdomen showed a mass in the rectum, which on biopsy revealed invasive adenocarcinoma.

• 出版日期2008-12