MedGen

Inflammation of the intestine leading to bacterial invasion causing cellular damage and death which causes necrosis of the colon and intestine. [from HPO]

A fulminating disease of neonates in which there is extensive mucosal ulceration, pseudomembrane formation, submucosal hemorrhage, and necrosis usually of the right colon, cecum, terminal ileum, and appendix, possibly due to perinatal intestinal ischemia and bacterial invasion. Progression can lead to necrosis, perforation and/or scarring of the intestinal tract. [from NCI]

A combination of rheumatoid arthritis (RA) and pneumoconiosis that manifests as intrapulmonary nodules, which appear homogenous and well-defined on chest X-ray. [from MONDO]