Miscellaneous Abnormalities of the Colon

Pneumatosis Intestinalis and Pneumoperitoneum After Bilateral Lung Transplantation in Adults

“…This linear and cystic form of benign PI is considerably different than the previously described benign form of cystic PI, pneumatosis cystoides intestinalis, which has a very bubbly-cystic appearance [8,18]. We have no explanation for the differing appearance of these two forms of benign PI.…”

“…We have no explanation for the differing appearance of these two forms of benign PI. Benign PI has been reported in both adults and children who are immunocompromised, which includes recipients of all types of transplants and patients with HIV [10][11][12][13][14][15][16][17][18][19]. In reviewing these articles, it is difficult to determine whether the extensive linear and cystic PI in our patients has been reported by other authors.…”

Perforated tumours in the gastrointestinal tract: CT findings and clinical implications

“…Perforation occurs in one of two forms: it arises through the tumour itself, secondary to tumour necrosis, or it can occur at the colon proximal to the tumour as a result of ''blow-out'' of the proximal colon as a result of a closed-loop obstruction in which colonic pressure proximal to the obstructing cancer increases because of a competent ileocaecal valve ( Figures 3 and 4) [11][12][13]. Perforation occurs most commonly in the sigmoid colon and caecum [11,14].…”

“…In addition, metastases are more commonly found in cases of perforated colon cancer than in cases of non-perforated colon cancer [11]. In patients with obstructive colorectal malignancy, marked dilatation of the right-side colon, such as of the caecum without ileal dilatation, owing to failure of decompression through the ileocaecal valve may represent impending diastatic perforation of the caecum due to closed-loop obstruction ( Figure 4) [12,13]. In addition, a caecal diameter .9 cm can be associated with an increased risk of perforation, and pneumatosis may precede perforation [13].…”

“…In patients with obstructive colorectal malignancy, marked dilatation of the right-side colon, such as of the caecum without ileal dilatation, owing to failure of decompression through the ileocaecal valve may represent impending diastatic perforation of the caecum due to closed-loop obstruction ( Figure 4) [12,13]. In addition, a caecal diameter .9 cm can be associated with an increased risk of perforation, and pneumatosis may precede perforation [13]. A large amount of free air is usually observed in cases involving coexistence of colon cancer perforation with colonic obstruction [11,12].…”