Fig. 1

CK levels after the first cycle of nelarabine administration in our patient. Nelarabine was administered on days 1, 3, and 5. Arrows show the days of nelarabine administration. The CK level was 48 IU/L before nelarabine administration, reached 18,620 IU/L on day 8, and returned to baseline on day 38. ALT, alanine transaminase; AST, aspartate transaminase; CK, creatine kinase; LDH, lactate dehydrogenase. K, potassium; P, phosphorus; Cre, creatinine