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  • Title: [Electron microscopic cytochemistry of pseudo-Chediak-Higashi granules in 5 cases of AML].
    Author: Mizushima W, Eguchi M, Sakakibara H, Sugita K, Furukawa T, Kanagawa M, Suda T, Yoshida M, Miura Y, Matsui J.
    Journal: Rinsho Ketsueki; 1990 Jun; 31(6):799-806. PubMed ID: 2214171.
    Abstract:
    Blasts from 5 cases of AML with pseudo-Chediak-Higashi granules were examined ultrastructurally and histocytochemically using peroxidase, acid phosphatase, high iron diamine (HID) and periodic acid-thiocarbohydrazide-silver proteinate (PA-TCH-SP) stainings. Pseudo-Chediak-Higashi granules, which appeared as vacuole-like inclusions by light microscopy, generally contained electron-lucent materials. All pseudo-Chediak-Higashi granules were, positive for peroxidase but some were negative for acid phosphatase. Pseudo-Chediak-Higashi granules were HID positive, indicating that they contained sulfated glycoconjugates. Glycogen-like particles were observed in the pseudo-Chediak-Higashi granules with the PA-TCH-SP method, as occasionally observed in granules in drug resistant ALL blasts. In conclusion, the contents of pseudo-Chediak-Higashi granules, which seems to be formed by fusion of small granules, differed from those of normal azurophillic granules.
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