A Rare Case of Activated Phosphoinositide 3-Kinase Delta Syndrome (APDS) Presenting With Hemophagocytosis Complicated With Hodgkin Lymphoma

J Pediatr Hematol Oncol. 2020 Mar;42(2):156-159. doi: 10.1097/MPH.0000000000001487.

Abstract

Gain of function mutations in the p110δ catalytic subunit of the phosphatidylinositol-3-OH kinase (PIK3CD) classified as activated phosphoinositide 3-kinase delta syndrome (APDS) are the cause of a primary immunodeficiency characterized by recurrent sinopulmonary infections, and lymphoproliferation. Previously, autoimmunity and Epstein-Barr virus-related B-cell lymphoma have been documented for patients with APDS; here, we present a case that extends the picture, as the patient shows the full diagnostic criteria of hemophagocytic lymphohistiocytosis at 6 months of age. He experienced Hodgkin lymphoma as a 2.5-year-old baby. Next-generation sequencing returned a de novo heterozygous missense variant in PIK3CD (LRG_191t1: c.3061G>A; p.Glu1021Lys), confirming the primary immunodeficiency. After 2 courses of ifosfamide, cisplatin, and etoposide combined with brentuximab, the patient successfully underwent allogeneic hematopoietic stem cell transplantation from his HLA full matched sister, and he has been well for 18 months after that. The hematologist treating Hodgkin lymphoma and/or hemophagocytic lymphohistiocytosis should be vigilant about the possible underlying immune deficiency, and they should consider APDS in their differential diagnosis.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use
  • Class I Phosphatidylinositol 3-Kinases / genetics*
  • Combined Modality Therapy
  • Hematopoietic Stem Cell Transplantation
  • Hodgkin Disease / complications
  • Hodgkin Disease / genetics
  • Hodgkin Disease / pathology*
  • Hodgkin Disease / therapy
  • Humans
  • Infant
  • Lymphohistiocytosis, Hemophagocytic / complications
  • Lymphohistiocytosis, Hemophagocytic / genetics
  • Lymphohistiocytosis, Hemophagocytic / pathology*
  • Lymphohistiocytosis, Hemophagocytic / therapy
  • Male
  • Mutation*
  • Primary Immunodeficiency Diseases / complications
  • Primary Immunodeficiency Diseases / genetics
  • Primary Immunodeficiency Diseases / pathology*
  • Primary Immunodeficiency Diseases / therapy
  • Prognosis

Substances

  • Class I Phosphatidylinositol 3-Kinases

Supplementary concepts

  • Activated PI3K-delta Syndrome