More on Untreated Maternal Hyperphenylalaninemia

Abstract

To the Editor: We share the conern of Buist et al. (July 5 issue)¹ that the statements of Levy and Waisbren (Nov. 24, 1983, issue)² are liable to be misinterpreted. In responding to the comments of Buist et al., Levy and Waisbren said,³ "The question whether there is any fetal effect at maternal phenylalanine levels between those designated as mild or moderate hyperphenylalaninemia and those consistent with classic phenylketonuria remains unanswered, as stated in our paper." The discrepancy between that statement and Figure 1 of Levy and Waisbren's own article² justifies an effort to see what their data can tell . . .