[D-penicillamine-induced IgA deficiency in the therapy of Wilson's disease].

Serum IgA deficiency was first noted in a 10 year old boy 8 months after the onset of D-penicillamine therapy. Special immunological examinations revealed a deficiency of the secretory component of IgA while cellular functions of T- and B-lymphocytes were normal. The patient showed discrete clinical signs compatible with IgA deficiency. Regular control of patients with Morbus Wilson and D-penicillamine treatment should include measurement of serum immunoglobulin levels.