Pneumatosis intestinalis occurred in a patient with a primary cytomega
loviral (CMV) infection with pneumonitis 6 weeks after single lung tra
nsplantation for primary pulmonary hypertension. The possible causal r
elationship between pneumatosis intestinalis, an uncommon disorder wit
h an obscure pathogenesis, and active CMV infection has been observed
before; however, to our knowledge, this is the first report of this co
mbination after lung transplantation, The patient had no abdominal com
plaints, and after treatment of the CMV infection, the pneumatosis int
estinalis resolved spontaneously. The early diagnosis of active CMV in
fection and the prevention of unnecessary abdominal surgery were essen
tial in this case.