The seventh reported case of achlorhydric juvenile pernicious anemia occurred in a 19-year-old man, who in addition, had a selective IgA deficiency. Family studies reveal pernicious anemia in three consecutive generations, but no other cases of IgA deficiency.
(JAMA 228:334-336, 1974)
Spector JI. Juvenile Achlorhydric Pernicious Anemia With IgA Deficiency: A Family Study. JAMA. 1974;228(3):334–336. doi:10.1001/jama.1974.03230280036029
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