pneumatosis cystoides

"pneumatosis cystoides intestinalis"

multiple gas filled cysts of various sizes located in subserosa (sometimes in submucosa)
age: adulthood
location: predominantly in lower colon

X-ray:

best demonstrated on CT
segmental mucosal nodularity (DDx: polyposis)
complication: assymptomatic large pneumoperitoneum (may persist for months/years)