患儿，男，6岁。送检组织绝大部分为出血坏死组织，肿瘤组织形态学和免疫组化结果如图：
病理诊断：请教各位老师，还需要做哪些工作？
讨论：ALK阳性肿瘤较多，非上皮性良性或恶性肿瘤的临床病理学特征归纳如下：
参考文献
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