title: Hematologic and molecular spontaneous remission following sepsis in acute monoblastic leukemia with translocation (9;11): a case report and review of the literature.
abstract: Spontaneous remission in patients with acute myeloid leukemia (AML) is a rarely reported phenomenon of usually short duration. The etiology remains unclear, but an association with preceding blood transfusions or bacterial infections has been reported. Triggered immune responses are suggested to play a potential role in the development of spontaneous remission. Acute monocytic leukemia was diagnosed in a 61-yr-old male patient. Cytogenetic analysis revealed a sole translocation (9;11) (q22;q23) and RT-PCR the MLL/AF9 fusion gene. As a result of the patient's reduced performance status and septic condition, cytostatic therapy was withheld. No microorganisms could be detected. Hematologic and molecular remission occurred after initiating antibiotic therapy without any cytostatic treatment; 29 months after the initial diagnosis, he is in complete remission, and excellent physical condition. Our report includes a review of the literature since 1985, reporting cases of patients with AML and spontaneous remission together with informative cytogenetics. Balanced translocations such as in core binding factor (CBF) leukemias appear somewhat overrepresented. We speculate that AML-specific T cells might be relevant for induction of spontaneous remission and need to be further investigated.
authors.affiliation: Department of Hematology/Oncology, University of Freiburg Medical Center, Hugstetter Str. 55, Freiburg, Germany.
authors.forename: Claudia I
authors.initials: CI
authors.lastname: Müller
authors.forename: Martin
authors.initials: M
authors.lastname: Trepel
authors.forename: Regina
authors.initials: R
authors.lastname: Kunzmann
authors.forename: Angela
authors.initials: A
authors.lastname: Lais
authors.forename: Rupert
authors.initials: R
authors.lastname: Engelhardt
authors.forename: Michael
authors.initials: M
authors.lastname: Lübbert
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001424:Bacterial Infections / Q000150:complications* / Q000188:drug therapy / Q000276:immunology; D001853:Bone Marrow / Q000473:pathology; D002880:Chromosomes, Human, Pair 11; D002899:Chromosomes, Human, Pair 9; D006801:Humans; D016130:Immunophenotyping; D007948:Leukemia, Monocytic, Acute / Q000150:complications* / Q000235:genetics / Q000473:pathology; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D012075:Remission, Spontaneous; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014178:Translocation, Genetic
chemical_list: D000900:Anti-Bacterial Agents