Detection of recurrent colorectal carcinoma with In-111 CYT-103 scintigraphy in a patient with nondiagnostic MRI and CT.

Detection of recurrent colorectal carcinoma can be a diagnostic challenge. The authors report a case of a patient who, after resection of his primary colorectal carcinoma, had a recurrence that was not detected by MRI or serial CT examination, but was clearly demonstrated by In-111 labeled CYT-103 scintigraphy. This case demonstrates the use of CYT-103 scintigraphy in detecting recurrent colorectal cancer in a patient, despite results of nondiagnostic MRI or serial CT examinations.