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  • Title: Systemic amyloidosis associated with factor X deficiency.
    Author: Shibuya H, Azumi N, Abe F, Deno M, Sakurama S.
    Journal: Acta Pathol Jpn; 1984 May; 34(3):639-47. PubMed ID: 6464754.
    Abstract:
    An autopsy case of amyloidosis associated with factor X deficiency is reported. The patient showed a markedly decreased level of factor X (9% normal) and an extremely shortened half-life of intravenously infused factor X. Amyloid deposition was present in most of the visceral organs with special involvement of the liver and spleen. The amyloid in this case was thought to be AL protein, since it was potassium-permanganate-resistant and a small amount of Bence Jones protein was detected after dimethyl sulfoxide therapy. Electron microscopic study revealed a typical appearance of amyloid fibrils radiating from invaginated cell membrane of Kupffer cells, which may indicate rather rapid turnover of the amyloid. Rapidity and severity of amyloid deposition, especially in the liver and spleen, may play an important role in the development of the factor X deficiency associated with systemic amyloidosis.
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