<prompt> A 14 year old boy complains with gingival bleeding, oral ulcers, anemia with hepatomegaly but no lymphadenopathy, total leukocyte count of one lakh cells per mm3 is suffering from:Acute myeloid leukemiaChronic monocytic leukemiaChronic lymphoblastic leukemiaChronic myeloid leukemia  <response>: Oral and periodontal manifestations of leukemia may include leukemic infiltration, bleeding, oral ulcerations, and infections. The expression of these signs is more common with acute and subacute forms of leukemia than with chronic forms.Leukemic cells can infiltrate the gingiva and, less frequently, the alveolar bone. Gingival infiltration often results in leukemic gingival enlargement leukemia. Highest incidence is seen in patients with acute monocytic leukemia 66.7, followed by those with acute myelocyticmonocytic leukemia 18.7 and acute myelocytic leukemia 3.7. It should be noted, however, that monocytic leukemia is an extremely rare form of the disease. Leukemic gingival enlargement is not found in edentulous patients or in patients with chronic leukemia, suggesting that it represents the accumulation of immature leukemic blast cells in the gingiva adjacent to tooth surfaces with bacterial plaque.The French-American-British FAB classification is an older system for describing AML, but it is still commonly used and is listed below for reference. MO: Myeloblastic without differentiation M1: Myeloblastic with little or no maturation M2: Myeloblastic with maturation M3: Promyelocytic M4: Myelomonocytic M4eo: Myelomonocytic with eosinophils M5a: Monocytic without differentiation monoblastic M5b: Monocytic with differentiation M6: Erythroleukemic M7: MegakaryocyticReference: Carranza Periodontology 13th ed page no 214 