Carcinoma Colon- Synchronous Lesions

Carcinoma Colon- Synchronous Lesions

Definition : Occurrence of two or  more primary tumors identified in the same patient and at the same time.

   The most voluminous synchronous cancer is called "index" cancer.

   Synchronous Lesions are caused by 
                                  common genetic and environmental factors.

   Overall incidence of synchronous colorectal cancers 
                                   varies between 2% to 10%.

   Hence a complete colonoscopic work up is indicated in every case.