Apparent monoclonal origin of lymphocytes and plasma cells infiltrating ocular adnexal amyloid deposits: report of 2 cases.

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Abstract
Two cases [human] of primary amyloidosis involving the orbit and lid, respectively, are described. Immunoperoxidase staining of the associated infiltrate of lymphocytes and plasma cells showed a clear preponderance of cells carrying .lambda. L chains in 1 case and .kappa. in the other. The predominant H chains were IgA and IgG, respectively. Apparently, these cases are burnt out local plasmacytomas.

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