Germline TP53 Mutations Causing Diamond-Blackfan Anemia: A French Report.
Pediatr Blood Cancer 2026 May 09; :e70363. [Online ahead of print]

Abstract

Diamond-Blackfan anemia is a rare congenital erythroblastopenia typically caused by mutations in ribosomal protein genes. Recently, gain-of-function mutations in TP53 have been identified as a novel cause of Diamond-Blackfan anemia. We report two French patients who both harbored a heterozygous TP53 deletion (NM_000546.5: c.1077delA; p.(Ser362AlafsTer8)). They exhibited normocytic anemia, transient neutropenia at presentation, and distinct neurological impairments. Neither patient responded to a corticosteroid trial. One patient underwent hematopoietic stem cell transplantation from a matched sibling donor and remained transfusion-independent at last follow-up. This study emphasizes the complexity of TP53-associated Diamond-Blackfan anemia syndrome and presents the only patient to date cured by hematopoietic stem cell transplantation.

Authors+Show Affiliations

Moisan R0009-0008-2564-8766Hematology Pediatric Department, CHU Lille, Lille, France.
Da Costa LHematology Diagnostic Lab, AP-HP, Kremlin Bicêtre Hospital, Paris, France. Paris Saclay University, Orsay, France. Inserm Unit 1770, Institut Gustave Roussy, Villejuif, France.
Nguyen LDHematology Diagnostic Lab, AP-HP, Kremlin Bicêtre Hospital, Paris, France.
Chosseler HDepartment of Pediatric Neurology, Saint Vincent de Paul Hospital, GHICL, Catholic University of Lille, Lille, France.
Riquet ADepartment of Pediatric Neurology, Saint Vincent de Paul Hospital, GHICL, Catholic University of Lille, Lille, France.
Bruno B0000-0002-6453-6395Hematology Pediatric Department, CHU Lille, Lille, France.
Barbati M0000-0003-1526-7405Hematology Pediatric Department, CHU Lille, Lille, France.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

42104732