Auer rod-positive acute leukemia with predominantly lymphoid immunophenotype: Report on 11 cases and review of literature.
Auer rods
biphenotypic acute leukemia
early T‐cell precursor lymphoblastic leukemia
Journal
Pediatric blood & cancer
ISSN: 1545-5017
Titre abrégé: Pediatr Blood Cancer
Pays: United States
ID NLM: 101186624
Informations de publication
Date de publication:
16 Oct 2024
16 Oct 2024
Historique:
revised:
05
09
2024
received:
10
05
2024
accepted:
06
10
2024
medline:
17
10
2024
pubmed:
17
10
2024
entrez:
17
10
2024
Statut:
aheadofprint
Résumé
Auer rods (AuRs) are prominent intracellular structures found almost exclusively in myeloid cell malignancies, such as acute myeloid leukemia (AML), chronic and juvenile myelomonocytic leukemia and myelodysplastic syndrome. Extremely rare AuRs have been reported in patients with acute lymphoblastic leukemia (ALL) or among ambiguous lineage leukemia patients with a dominantly lymphoblastic immunophenotype. We report diagnostic and follow-up data of an international cohort of 11 children suffering from leukemias with AuRs and with significant presence of T and myeloid markers, majority of whom categorized as early T-cell precursor (ETP, n = 7); or T-ALL (ETP status unknown, n = 2), ALAL (acute leukemia of ambiguous lineage, n = 1), and AML reclassified from ALAL (n = 1). We described other diagnostic details and treatment types and responses. Moreover, we summarize previously published data. Among the four patients who started and remained on ALL-type therapy, all were in the first complete remission, whereas both patients who started and remained on AML-type therapy relapsed and died. Of the patients who followed either a combined ALL/AML protocol (Interfant 06) or who switched from one of the two types of therapy to the other, one patient died, and the remaining four were in first complete remission at the most recent follow-up. We also searched for similar cases in the literature and found only three additional children with nonmyeloid leukemia and AuRs and 10 adults with this type of leukemia. Briefly, ALL- or combined ALL/AML-type therapy may be effective for treating AuR-positive leukemia patients with a lymphoid immunophenotype.
Sections du résumé
BACKGROUND
BACKGROUND
Auer rods (AuRs) are prominent intracellular structures found almost exclusively in myeloid cell malignancies, such as acute myeloid leukemia (AML), chronic and juvenile myelomonocytic leukemia and myelodysplastic syndrome. Extremely rare AuRs have been reported in patients with acute lymphoblastic leukemia (ALL) or among ambiguous lineage leukemia patients with a dominantly lymphoblastic immunophenotype.
PROCEDURE
METHODS
We report diagnostic and follow-up data of an international cohort of 11 children suffering from leukemias with AuRs and with significant presence of T and myeloid markers, majority of whom categorized as early T-cell precursor (ETP, n = 7); or T-ALL (ETP status unknown, n = 2), ALAL (acute leukemia of ambiguous lineage, n = 1), and AML reclassified from ALAL (n = 1). We described other diagnostic details and treatment types and responses. Moreover, we summarize previously published data.
RESULTS
RESULTS
Among the four patients who started and remained on ALL-type therapy, all were in the first complete remission, whereas both patients who started and remained on AML-type therapy relapsed and died. Of the patients who followed either a combined ALL/AML protocol (Interfant 06) or who switched from one of the two types of therapy to the other, one patient died, and the remaining four were in first complete remission at the most recent follow-up. We also searched for similar cases in the literature and found only three additional children with nonmyeloid leukemia and AuRs and 10 adults with this type of leukemia.
CONCLUSIONS
CONCLUSIONS
Briefly, ALL- or combined ALL/AML-type therapy may be effective for treating AuR-positive leukemia patients with a lymphoid immunophenotype.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e31394Subventions
Organisme : Univerzita Karlova v Praze
Organisme : European Union and state budget of Czechia
Organisme : Ministerstvo Zdravotnictví Ceské Republiky
Informations de copyright
© 2024 The Author(s). Pediatric Blood & Cancer published by Wiley Periodicals LLC.
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