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To the Editor.—
As printed, I must agree with Dr. Voron that the Test Your Knowledge question in the Archives (110:252, 1974) does not provide an incorrect choice. The question as originally submitted to the Archives stated "decreased or absent levels of IgM" (not "undetermined," which makes no sense). Although one would expect to find, as Dr. Voron states, decreased levels of serum IgM, absence of IgM would not be expected, and the original inclusion of "absent" in choice D would render it not completely true. I must apologize for what may have been an editorial error and thank Dr. Voron for his vigilance and interest in this feature of the Archives.
Goldyne ME. Test Your Knowledge Quiz-Reply. Arch Dermatol. 1975;111(5):659. doi:10.1001/archderm.1975.01630170117031
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