Blinatumomab-related pneumatosis intestinalis in a pediatric patient with relapsed acute lymphoblastic leukemia: A...

Pneumatosis intestinalis is characterized by air in the subserosal or submucosal layer of the intestine, with the severity ranging from mild and asymptomatic to symptomatic with serious conditions such as intestinal ischemia and perforation requiring surgery. Although several etiologies, including those from conventional chemotherapy agents and molecular target agents, have been suggested, blinatumomab-related pneumatosis intestinalis is quite rare.

An 11-year-old girl with history of B-cell ALL presented with bone marrow relapse 3 years after completion of initial chemotherapy. Reinduction chemotherapy and blinatumomab as post-reinduction consolidation were initiated. On day 28 of blinatumomab therapy, pneumatosis intestinalis from the ascending colon to the hepatic flexure was found incidentally on abdominal computed tomography.Management and outcome: After withholding blinatumomab therapy for 1 month, pneumatosis intestinalis improved significantly without abnormal gastrointestinal symptoms. Blinatumomab was resumed and safely completed. The computed tomography performed 4 months later showed complete resolution of pneumatosis intestinalis. The patient has been in good condition for over 1 year to date.

To our knowledge, this is the first case report of pneumatosis intestinalis after blinatumomab therapy in a pediatric patient with relapsed precursor B-cell acute lymphoblastic leukemia. Herein, we highlight the importance of early detection of pneumatosis intestinalis through imaging follow-up during blinatumomab therapy.