Ataxia telangiectasia is chracterised by all of the following except :
Answer is B (Decreased levels of a fetoproteins) Persistance of very high levels of oncofetal proteins, including alpha fetoproteins and carcinoembryonic antigens is of diagnostic value - Harrison All other features mentioned as options are characteristics of Ataxia-telengiectasia
Chronic sinopulmonary disease
Decreased level of a-fetoprotein
Chromosomal breakage
IgA deficiency