SNOMEDCT: 84027009; ICD10CM: D51.0; ICD9CM: 281.0; DO: 13381;
In the relatives of 34 pernicious anemia probands, McIntyre et al. (1959) tested the ability to absorb orally given doses of cobalt-60 labeled vitamin B12 (Schilling test). The relatives of pernicious anemia patients showed a negative correlation with age; control subjects did not. The relatives showed a tendency to bimodality. Forty-eight percent of sibs and 32% of offspring had abnormal absorption. The authors suggested autosomal dominant inheritance. Wangel et al. (1968) suggested that the tendency to form autoantibodies against gastric parietal cells may be inherited as a dominant with incomplete penetrance. Later studies (McIntyre, 1968) yielded results that make a simple genetic hypothesis difficult to support. As pointed out by Twomey (1975), pernicious anemia shows a 10-fold increase in patients with multiple myeloma and a 250-fold increase in adults with immunoglobulin deficiency.
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McIntyre, P. A. Genetic and auto-immune features of pernicious anemia. I. Unreliability of the Schilling test in detecting genetic predisposition to the disease. Johns Hopkins Med. J. 122: 181-183, 1968. [PubMed: 5648177]
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Wangel, A. G., Callender, S. T., Spray, G. H., Wright, R. A family study of pernicious anaemia. I. Autoantibodies, achlorhydria, serum pepsinogen and vitamin B12. Brit. J. Haemat. 14: 161-181, 1968. [PubMed: 4865547] [Full Text: https://doi.org/10.1111/j.1365-2141.1968.tb01485.x]
Wangel, A. G., Callender, S. T., Spray, G. H., Wright, R. A family study of pernicious anaemia. II. Intrinsic factor secretion, vitamin B12 absorption and genetic aspects of gastric autoimmunity. Brit. J. Haemat. 14: 183-204, 1968. [PubMed: 5635601] [Full Text: https://doi.org/10.1111/j.1365-2141.1968.tb01486.x]