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  • Title: Diffuse large B-cell lymphoma initially manifesting in the bone marrow.
    Author: Kajiura D, Yamashita Y, Mori N.
    Journal: Am J Clin Pathol; 2007 May; 127(5):762-9. PubMed ID: 17439835.
    Abstract:
    We histologically and immunohistochemically studied 37 cases of diffuse large B-cell lymphoma (DLBCL) initially manifesting in the bone marrow (BM). We also compared these cases with the Asian variant of intravascular large B-cell lymphoma (AIVL). Histologically, the neoplastic cells of the BM mostly had large and round nuclei and formed clusters. Immunohistochemically, all cases were positive for B-cell markers. Factor VIII staining revealed neoplastic cells within the sinusoids of BM in 8 cases; however, these cells accounted for fewer than 20% of the overall neoplastic cells. In several cases, the neoplastic cells infiltrated liver, spleen, kidneys, lungs, stomach, and adrenal glands with a mainly leukemic and infrequently intravascular pattern. Although our cases share some clinical features with AIVL, we consider DLBCL initially manifesting in the BM to be a unique entity because the neoplastic cells proliferate mainly in BM, with infrequent involvement of the sinusoids and occasional leukemic infiltration in various organs.
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