Jejunal Pseudodiverticulosis in a Swamp Wallaby (Wallabia bicolor)

Pseudodiverticula of the Small Intestine Associated With Idiopathic Smooth Muscle Hypertrophy in Domestic Rabbits (Oryctolagus cuniculus)

“…7,13 Pseudodiverticulosis—the disease associated with pseudodiverticula formation—has been described in the small intestine of animals, most frequently in horses 5,6 and pigs 6 and rarely in sheep, 6 cats, 2 an elk, 14 and a wallaby. 8 Small intestinal pseudodiverticula have not been reported in lagomorphs to date. However, colonic pseudodiverticula have been induced experimentally in rabbits by a low-residue diet in combination with pharmacologic stimulation of intestinal motility.…”

“…At least in rats and cats, idiopathic MHSI has been suspected to be caused by chronic intestinal inflammation. 2,3 Reported secondary complications of pseudodiverticula in animals include perforation with subsequent peritonitis, 6,8,13 as well as intramural bleeding. 1 In the 4 presented cases, severe necrosis and inflammation of the wall of large pseudodiverticula were considered the most likely explanation for the clinical signs.…”

“…In congenital true diverticula, such as persistent Meckel diverticulum, the wall consists of all layers of the intestinal tract, whereas the wall of pseudodiverticula lacks the tunica muscularis. 11 Pseudodiverticula are mainly found at the mesenteric surface of the intestine 5,6,8,14 but can rarely be observed at the antimesenteric side. 7,13 Pseudodiverticulosis—the disease associated with pseudodiverticula formation—has been described in the small intestine of animals, most frequently in horses 5,6 and pigs 6 and rarely in sheep, 6 cats, 2 an elk, 14 and a wallaby.…”