小儿肿瘤与免疫研究的若干困惑与希望蔡志明小儿肿瘤与免疫的关系是一个既十分有趣又令人头痛的问题，至今仍有诸多困惑，但也充满希望。兹简述如下。１．肿瘤的存在抑制了免疫系统，还是免疫系统的破坏导致肿瘤的发生？两者均能找到一些支持的依据，但仍不足以说明“谁为... Puzzles and Hopes in Pediatric Oncology and Immunology Research CAI Zhi-ming The relationship between pediatric oncology and immune system is a very interesting and troubling issue. There are still many puzzles but there are still plenty of hopes. Here is a brief description 1. The existence of tumor suppress the immune system, or the destruction of the immune system led to the occurrence of tumors? Both can find some support, but still not enough to say "who ...