Pneumocystis cystoides intestinalis with pneumoperitoneum and pneumoretroperitoneum in a patient with extensive chronic graft-versus-host disease

Pneumatosis cystoides intestinalis is a rare finding of intramural gasfille d cysts in the bowel wall and sometimes free air in the abdomen. A few cond itions are reported to cause this disease, one of them being immunosuppress ion, We describe a 50-year-old Caucasian male with extensive chronic graft- versus-host disease (GVHD) of the gut and skin who developed PCI with pneum operitoneum and pneumoretroperitoneum. To our knowledge, this is the first report of PCI occurring in a patient with active chronic GVHD which resolve d spontaneously.