The activity of adenosine deaminase (ADA) in cerebrospinal fluid was determined in 7cases center neverous system leukernia (CNSL ), 14 cases acute lymphocytic leukemia(ALL) without CNSL and 15 cases control children with colorirntric analysis.

• 为了探讨脑脊液腺苷脱氨酶（ADA）对中枢神经系统白血病（CNSL）的诊断价值，用比色法对7例急性淋巴细胞性白血病（ALL）伴CNSL和14例无CNSL的ALL患儿进行了脑脊液ADA活性的测定并与15例对照儿的测定值比较。