RESECTED SIGMOID CARCINOMA WITH 13-YEAR METASTASIS-FREE INTERVAL - STERNAL RECURRENCE DETECTED BY IMMUNOSCINTIGRAPHY

Colorectal cancers rarely present with bone metastases. Regular postop erative monitoring after resection by conventional imaging techniques and carcinoembryonic antigen levels aids physicians in identifying suc h tumor recurrences. However, some recurrences might elude detection b y bone scan, computed tomography, and magnetic resonance imaging, and newer tests such as immunoscintigraphy using radioimmune-tagged monocl onal antibodies may be more diagnostic. Here we report a case, present ing with delayed recurrence at a rare bony site, in which application of immunoscintigraphy helped in the definitive detection of the tumor recurrence.