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Box lots of the Cho/Cr ratio and the Cho/NAA ratio of all the PCNSLs, atypical PCNSLs, and TDLs. All of the PCNSLs as well as atypical PCNSLs reveal a higher Cho/Cr ratio (A) and higher Cho/NAA ratio (B) than TDLs. Some very high Cho/Cr and Cho/NAA ratios are observed exclusively in PCNSLs (circles).
