The results showed that the expression of CD33, CD123, CLL‐1, CD38, CD7, FLT‐3, B7‐H3, TIM‐3, CD44V6, CD93 and CD99 was significantly higher than that of normal tissues in tumour tissues, and the expression of CD70 and Le Y in tumour tissues was not significantly different from that of normal tissues (Figure 5). The gene discussed is CD99; the disease is neoplasm.