Severe Immune-Related Enteritis after In Utero Exposure to Pembrolizumab

N Engl J Med. 2023 Nov 9;389(19):1790-1796. doi: 10.1056/NEJMoa2308135.

Abstract

Immune checkpoint blockade has become standard treatment for many types of cancer. Such therapy is indicated most often in patients with advanced or metastatic disease but has been increasingly used as adjuvant therapy in those with early-stage disease. Adverse events include immune-related organ inflammation resembling autoimmune diseases. We describe a case of severe immune-related gastroenterocolitis in a 4-month-old infant who presented with intractable diarrhea and failure to thrive after in utero exposure to pembrolizumab. Known causes of the symptoms were ruled out, and the diagnosis of pembrolizumab-induced immune-related gastroenterocolitis was supported by the results of histopathological assays, immunophenotyping, and analysis of the level of antibodies against programmed cell death protein 1 (PD-1). The infant's condition was successfully treated with prednisolone and infliximab.

Publication types

  • Case Reports

MeSH terms

  • Antibodies, Monoclonal, Humanized / administration & dosage
  • Antibodies, Monoclonal, Humanized / adverse effects
  • Antibodies, Monoclonal, Humanized / therapeutic use
  • Antineoplastic Agents, Immunological / administration & dosage
  • Antineoplastic Agents, Immunological / adverse effects
  • Antineoplastic Agents, Immunological / therapeutic use
  • Diarrhea, Infantile / chemically induced
  • Diarrhea, Infantile / immunology
  • Enteritis / chemically induced
  • Enteritis / diagnosis
  • Enteritis / drug therapy
  • Enteritis / immunology
  • Enterocolitis / chemically induced
  • Enterocolitis / diagnosis
  • Enterocolitis / drug therapy
  • Enterocolitis / immunology
  • Failure to Thrive / chemically induced
  • Failure to Thrive / immunology
  • Gastroenteritis* / chemically induced
  • Gastroenteritis* / diagnosis
  • Gastroenteritis* / drug therapy
  • Gastroenteritis* / immunology
  • Humans
  • Immune Checkpoint Inhibitors* / administration & dosage
  • Immune Checkpoint Inhibitors* / adverse effects
  • Immune Checkpoint Inhibitors* / therapeutic use
  • Infant
  • Neoplasms* / drug therapy
  • Programmed Cell Death 1 Receptor / immunology

Substances

  • Antibodies, Monoclonal, Humanized
  • pembrolizumab
  • Antineoplastic Agents, Immunological
  • Immune Checkpoint Inhibitors
  • PDCD1 protein, human
  • Programmed Cell Death 1 Receptor