Granulomas Associated with Tetanus Toxoid Immunization

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Abstract
Two patients developed localized nodular reactions at the site of prior tetanus toxoid injections. Histology of the lesions showed granuloma formation with central granular debris surrounded by a histiocytic mantle. Peripheral to this was a dense lymphoid infiltrate with eosinophils. Examination with energy dispersive x-ray microanalysis confirmed the presence of aluminium and phosphorus in the granular debris but not in the surrounding infiltrate.

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