Autoimmune lymphoproliferative syndrome–like disease with somatic KRAS mutation

Author:

Takagi Masatoshi1,Shinoda Kunihiro2,Piao Jinhua1,Mitsuiki Noriko1,Takagi Mari2,Matsuda Kazuyuki3,Muramatsu Hideki4,Doisaki Sayoko4,Nagasawa Masayuki1,Morio Tomohiro1,Kasahara Yoshihito5,Koike Kenichi6,Kojima Seiji4,Takao Akira2,Mizutani Shuki1

Affiliation:

1. Department of Pediatrics and Developmental Biology, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan;

2. Department of Pediatrics, Gifu Municipal Hospital, Gifu, Japan;

3. Department of Laboratory Medicine, Shinshu University School of Medicine, Nagano, Japan;

4. Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi, Japan;

5. Department of Laboratory Sciences, Kanazawa University School of Health Sciences, Ishikawa, Japan; and

6. Department of Pediatrics, Shinshu University School of Medicine, Nagano, Japan

Abstract

Abstract Autoimmune lymphoproliferative syndrome (ALPS) is classically defined as a disease with defective FAS-mediated apoptosis (type I-III). Germline NRAS mutation was recently identified in type IV ALPS. We report 2 cases with ALPS-like disease with somatic KRAS mutation. Both cases were characterized by prominent autoimmune cytopenia and lymphoadenopathy/splenomegaly. These patients did not satisfy the diagnostic criteria for ALPS or juvenile myelomonocytic leukemia and are probably defined as a new disease entity of RAS-associated ALPS-like disease (RALD).

Publisher

American Society of Hematology

Subject

Cell Biology,Hematology,Immunology,Biochemistry

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