Multiple primary malignancies in a single patient are relatively rare but have increase in frequency in recent decades. This may be a result of medical advancements in diagnostic and therapeutic strategies, a possible...Multiple primary malignancies in a single patient are relatively rare but have increase in frequency in recent decades. This may be a result of medical advancements in diagnostic and therapeutic strategies, a possible effect of new carcinogens in the industrial environment, and longer life span allowing another primary cancer to develop. Among those with multiple primary malignancies, double cancer is commonly seen, while triple cancers occur in 0.5% of patients, and quadruple or quintuple cancers occur in only less than 0.1% of the population.展开更多
文摘Multiple primary malignancies in a single patient are relatively rare but have increase in frequency in recent decades. This may be a result of medical advancements in diagnostic and therapeutic strategies, a possible effect of new carcinogens in the industrial environment, and longer life span allowing another primary cancer to develop. Among those with multiple primary malignancies, double cancer is commonly seen, while triple cancers occur in 0.5% of patients, and quadruple or quintuple cancers occur in only less than 0.1% of the population.
