perforating ulcer

ulcer /ul·cer/ (ul´ser) a local defect, or excavation of the surface, of an organ or tissue, produced by sloughing of necrotic inflammatory tissue.

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corneal ulcer  ulcerative keratitis.

decubital ulcer , decubitus ulcer bedsore; an ulceration due to an arterial occlusion or prolonged pressure, as when a patient is confined to a bed or a wheelchair.

duodenal ulcer  a peptic ulcer situated in the duodenum.

gastric ulcer  an ulcer of the gastric mucosa.

Hunner's ulcer  one involving all layers of the bladder wall, occurring in chronic interstitial cystitis.

jejunal ulcer  an ulcer of the jejunum; such an ulcer following surgery is called a secondary jejunal u.

marginal ulcer  a gastric ulcer in the jejunal mucosa near the site of a gastrojejunostomy.

peptic ulcer  an ulceration of the mucous membrane of the esophagus, stomach, or duodenum, due to action of the acid gastric juice.

perforating ulcer  one involving the entire thickness of an organ or of the wall of an organ creating an opening on both surfaces.

phagedenic ulcer 

1. a necrotic lesion associated with prominent tissue destruction, due to secondary bacterial invasion of an existing cutaneous lesion or of intact skin in a person with impaired resistance as the result of systemic disease.

2. tropical phagedenic u.

plantar ulcer  a deep neurotrophic ulcer of the sole of the foot, resulting from repeated injury because of lack of sensation in the part; seen with diseases such as diabetes mellitus and leprosy.

rodent ulcer  ulcerating basal cell carcinoma of the skin.

stercoraceous ulcer , stercoral ulcer one caused by pressure of impacted feces; also, a fistulous ulcer through which fecal matter escapes.

stress ulcer  peptic ulcer, usually gastric, resulting from stress.

trophic ulcer  one due to imperfect nutrition of the part.

tropical ulcer 

1. a lesion of cutaneous leishmaniasis.

2. tropical phagedenic u.

tropical phagedenic ulcer  a chronic, painful, phagedenic ulcer of unknown cause, usually on the lower limbs of malnourished children in the tropics.

varicose ulcer  an ulcer due to varicose veins.

venereal ulcer  a nonspecific term referring to the formation of ulcers resembling chancre or chancroid about the external genitalia.

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perforating ulcer

[pur′fôrā′ting]

Etymology: L, perforare, to pierce, ilcus

1 an ulcer that penetrates the thickness of a wall or membrane, such as a peptic ulcer of the digestive tract.

2 a deep, painless ulcer, often on the sole of the foot, of a person whose skin is insensitive because of a disease such as diabetes.

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ulcer

a local defect, or excavation of the surface of an organ or tissue, produced by sloughing of necrotic inflammatory tissue. They occur in all organs and tissues and are to be found under those headings, e.g. abomasal, corneal, gastric.

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button ulcer

see button ulcer.

callous ulcer

see set-fast (2).

collagenase ulcer

a rapidly expanding, erosive ('melting') corneal ulcer, seen particularly in brachycephalic breeds of dogs.

Curling's ulcer

acute ulceration of the stomach or duodenum seen after severe burns of the body in humans.

decubitus ulcer

see decubitus ulcer.

dendritic ulcer

linear, branching pattern of ulceration on the cornea; characteristic of herpesvirus infections. See also herpetic keratitis.

eosinophilic ulcer

see eosinophilic ulcer.

gastroduodenal ulcer

common in foals 1-3 months old. Many are asymptomatic. Clinical cases manifest by mild, intermittent colic. See also gastric ulcer, duodenal ulcer.

geographic ulcer

a large, superficial, irregularly shaped corneal ulcer, typically formed by the coalescence of several dendritic ulcers.

indolent ulcer

see eosinophilic ulcer, refractory ulcer (below).

infectious dermal ulcer

a systemic, fatal bacteremia of snakes manifested by multiple, small cutaneous ulcers. Called also scale rot.

intestinal ulcer

is rare in all species. When they do occur, intestinal ulcers usually cause signs of chronic enteritis. It is a common lesion in adenocarcinoma of the intestine. See also peptic ulcer.

lip ulcer

see eosinophilic ulcer.

lip and leg ulcer

see ulcerative dermatosis.

melting ulcer

see collagenase ulcer (above).

ulcer mound

a gastric ulcer viewed tangentially radiographically creates a mound in the otherwise smooth outline of radiopaque material in the stomach.

necrotic ulcer of swine

see ulcerative granuloma of swine.

perforating ulcer

one that involves the entire thickness of an organ, creating an opening on both surfaces. See also ulcer perforation.

phagedenic ulcer

a necrotizing lesion in which tissue destruction is prominent.

refractory ulcer

a chronic, superficial corneal ulceration in dogs, particularly common in Boxers, that extends into the superficial stroma, often undermining epithelium at the edges. The cause is unknown but abnormalities of the basal epithelial cells and anterior stroma have been noted. Response to the usual methods of treatment for corneal ulceration is characteristically very slow; superficial keratectomy is the treatment of choice. Called also superficial corneal erosion syndrome, Boxer ulcer.

rodent ulcer

see eosinophilic ulcer.

stress ulcer

superficial ulcerations or erosions of mucosa in the stomach, duodenum or colon. The possible predisposing factors include changes in the microcirculation of the gastric mucosa, increased permeability of the gastric mucosa barrier to H+, and impaired cell proliferation.

stromal ulcer

a corneal ulcer involving the stroma.

trophic ulcer

one due to imperfect nutrition of the part. In dogs, may develop in digital and metatarsal pads in association with tibial nerve injury.