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In this case of periodic paralysis and thyrotoxicosis, investigation of the patient's family revealed other members similarly affected. To the best of the authors' knowledge, it represents the first reported instance of this familial association in the case of a black woman.

No quantitative changes in serum IgG subclass concentrations could be correlated clinically with periodontal disease, despite evidence of restrictive IgG sublcass antibody responses in inflamed gingiva. Serum from periodontal patients also lacked circulating immune complexes.