Acute myeloid leukemia (AML) is an aggressive hematopoietic malignancy that left untreated or undiagnosed can lead to death within few days. Hence, early diagnosis and appropriate treatment become necessary. Oral manifestations in AML could be the presenting feature or could a part of systemic manifestations. Gingival lesions appear as generalized enlargement with hemorrhagic discoloration with or without spontaneous bleeding. Sometimes, gingival lesions itself could a presenting sign without any other systemic manifesto. We report a similar case which was undiagnosed earlier and the patient came with a complaint of only the gingival swelling.