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Background: Angiogenesis, which is the development of new capillaries from existing blood vessels, occurs in both the developing embryo and postnatal life. The growth of solid tumours requires the development of micro vessels; therefore, tumour expansion correlates with the extent of angiogenesis.Methods: A prospective study was conducted on bone marrow trephine biopsies of 40 new cases of acute leukaemia diagnosed on complete blood count, bone marrow aspiration examination, and flow cytometry, including 20 control cases. Micro sections were stained with immuno-histochemical stains using monoclonal antibodies to CD31, CD34 and vWF. Micro vessel density was analysed at a 400× using automated image analyser by two investigators independently. Data were calculated, tabulated and statistically analysed using statistical package for the social sciences (SPSS) statistical program version 18.Results: A total of 1522 micro vessels were analysed using CD31 including 802 in acute myeloid leukaemia (AML), 512 in acute lymphocytic leukemia (ALL) and 208 in the control group. The bone marrow microvessel density (MVD) in acute myeloid leukaemia using CD31, CD34 and Von Willebrand factor (VWF) was 70.83±20.76, 66.48±18.99 and 60.32±18.75 respectively while MVD in acute lymphoblastic leukaemia was 62.74±21.09, 70.58±22.46 and 51.22±21.13 respectively. The study revealed significant difference between AML, ALL and normal bone marrow cases by using CD31, CD34 and vWF antibody. Serum vascular endothelial growth factor (VEGF) concentration in AML, ALL and control group was 163.74±119.03, 168.23±154.22 and 43.45±9.14 respectively.Conclusions: Higher micro vessel density was observed in acute leukaemia. Present findings suggested the potential significance of characteristics of micro vessel density as potential prognostic marker as well as its application in improved selection of patients for anti-angiogenic and other treatments.

Introduction: Non-Hodgkin lymphomas (NHLs) are a heterogeneous group of lymphoproliferative malignancies that can disseminate to organs and tissues that do not ordinarily contain lymphoid cells (extranodal sites). Primary extranodal NHL of the oral cavity is rare, and gingiva is one of the rarest intraoral sites involved. The majority of oral NHLs reported are of diffuse large B-cell type. Such lymphomas are more prevalent in immunocompromised patients. Because of their malignant nature, early recognition, diagnosis, and treatment are essential for a patient's survival. To the best of our knowledge, this report presents the first case of diffuse mixed small and large B-cell lymphoma involving the gingiva in a non-immunocompromised patient.Case Presentation: A female patient presented with a growth located on the palatal aspect of the right maxillary molar region involving marginal and interdental gingiva. Routine laboratory tests and clinical examination were within normal limits. An incisional biopsy of ...