The oral repercussions of patients with leukemia include the reduction of the production of blood cells that can lead to anemia, neutropenia, and thrombocytopenia. This work aims to report on the oral repercussions and dental management of patients with leukemia. A 42-year-old woman with a recent diagnosis of acute myeloid leukemia during the chemotherapy underwent oral opening limitation, with a complaint of odynophagia and low dietary intake, consuming only liquid consistency food. Lip dryness with erosive areas, an increase of volume in the upper lip, and presence of hyperplasia and ecchymoses in the gingival margin and in the region of hard and soft palate were observed. The patient had leukopenia and thrombocytopenia. Lesions management was performed daily, as well as follow-up to minimize discomfort and avoid secondary infections. After medullary recovery, improvement of the general clinical picture of the patient was remarkable. The oral repercussions of patients with leukemia include the reduction of the production of blood cells that can lead to anemia, neutropenia, and thrombocytopenia. This work aims to report on the oral repercussions and dental management of patients with leukemia. A 42-year-old woman with a recent diagnosis of acute myeloid leukemia during the chemotherapy underwent oral opening limitation, with a complaint of odynophagia and low dietary intake, consuming only liquid consistency food. Lip dryness with erosive areas, an increase of volume in the upper lip, and presence of hyperplasia and ecchymoses in the gingival margin and in the region of hard and soft palate were observed. The patient had leukopenia and thrombocytopenia. Lesions management was performed daily, as well as follow-up to minimize discomfort and avoid secondary infections. After medullary recovery, improvement of the general clinical picture of the patient was remarkable.