<unk>  is a condition where the thymus is underdeveloped or involuted. Calcium levels can be used to distinguish between the following two conditions associated with<unk> : * 22q11.2 deletion syndrome: hypocalcemia * Ataxia telangiectasia: normal levels of calcium
Thymic hypoplasia
Abscess of thymus
Reticular dysgenesis
T cell deficiency
Salivary gland hypoplasia
Salivary gland aplasia
Ectopic thymus
IgG deficiency