[show abstract][hide abstract] ABSTRACT: A 67 year old man developed "status epilepticus" and died with acute respiratory failure. An autopsy and concomitant histological examination, revealed intravascular infiltrate of lymphoid cells throughout the body. Immunohistochemical studies showed intense positive staining for leukocyte common antigen (LCA), L26 and CD20 and negative staining for Factor VIII- related antigen, and CD5, demonstrated that the neoplastic cells were of B-cell lineage.
Journal of experimental & clinical cancer research: CR 07/2004; 23(2):345-8. · 1.50 Impact Factor
[show abstract][hide abstract] ABSTRACT: A patient was diagnosed as having angioendotheliomatosis proliferans systemisata (APS) based on characteristic clinical and histologic features. A few days later, malignant lymphoma involving the gut was discovered. Immunohistochemical and electronmicroscopic studies confirmed the nonendothelial and lymphoid nature of intravascular tumor cells. This is the sixth case in which malignant lymphoma has been shown to involve the vessels of the skin (and probably of other organs) in a pattern identical to that seen in APS.
[show abstract][hide abstract] ABSTRACT: Neoplastic angioendotheliosis (NAE) is a rare, mostly fatal disease characterized by proliferation of large blastoid cells in small vessels of various organs. The origin of neoplastic cells remain undetermined. In this study, cell markers were studied immunohistologically on paraffin sections of six cases of NAE, by applying avidin-biotin-peroxidase (ABC) method and five antibodies which can demonstrate marker antigens on formalin fixed and paraffin embedded specimens. It was shown that the neoplastic cells were heavily stained with an anti-B lymphocyte monoclonal antibody LN-1 (6/6), moderately stained with another anti-B lymphocyte antibody LN-2 (5/6) and heavily stained with a monoclonal antibody which reacts with all levels of leukocytes (Dako-LC) (6/6). The cells did not show positive reaction with an anti-myelomonocytic antibody anti-Leu M1. The reaction against anti-Factor VIII, which can depict endothelial cells, was mostly negative, and if positive, was faint and indefinite, leading to an assumption that the reaction was against antigens in serum and not against neoplastic cells. These results suggest that the neoplastic cells of NAE are in the B lymphocyte lineage.
Virchows Archiv. A, Pathological anatomy and histopathology 02/1985; 407(2):167-75.
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