RT Journal Article SR Electronic T1 Imatinib-induced pericardial effusion in a child JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e229975 DO 10.1136/bcr-2019-229975 VO 12 IS 9 A1 Charlotte Terry A1 Pascale Avery A1 Sarah Morton A1 Jon Aron YR 2019 UL http://casereports.bmj.com/content/12/9/e229975.abstract AB A 12-year-old boy presented with central chest pain, shortness of breath and type 1 respiratory failure. He had a background of graft versus host disease (GvHD), which was currently managed with imatinib therapy. A focused bedside ultrasound scan was performed revealing a large pericardial effusion. The child was referred to a tertiary paediatric cardiology centre where he underwent emergency pericardiocentesis, draining a total of 800 mL of pericardial fluid. Fluid analysis excluded infection, and with no other concerns for a GvHD flare the diagnosis of an imatinib-induced pericardial effusion was made. On terminating the therapy, the pericardial collection did not reaccumulate. Tyrosine kinase inhibitor-induced pericardial and/or pleural effusion should be considered as a differential diagnosis in paediatric patients on this therapy presenting in a similar manner.