Acute lymphoblastic leukemia with pneumatosis cystoides intestinalis after hematopoietic stem cell transplantation: a case report.

Pneumatosis cystoides intestinalis (PCI) is a rare condition characterized by air accumulation within the subserosa or submucosa of the gastrointestinal wall. We herein report a case involving a woman in her early 30s who developed PCI after undergoing allogeneic hematopoietic stem cell transplantation (HSCT) for acute lymphoblastic leukemia. The patient had a history of multiple COVID-19 infections. Imaging revealed extensive pneumoperitoneum and mesenteric emphysema; nevertheless, the patient remained clinically stable with a benign abdominal examination. She eventually recovered after 1 month of conservative treatment. We believe the PCI in this case had a multifactorial etiology, potentially involving both HSCT and COVID-19. Raising awareness of PCI may help avoid unnecessary surgical interventions and associated morbidity.