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80 Cards in this Set
- Front
- Back
angle along the lesser curve
marks the approximate point at which the stomach narrows prior to its junction with duodenum |
incisura angularis
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narrow conical portion of stomach immediately distal to gastroesophageal junction
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cardia
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dome shaped portion of the proximal stomach that extends superolateral to the gastroesophageal junction
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fundus
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stomach proximal to the incisura angularis
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body/corpora
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stomach distal to the angle
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antrum
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infoldings of mucosa and submucosa that extend longitudinally
most prominent in the proximal stomach flatten out if the stomach |
rugae
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gastric pits leading to the mucosal glands
surface epithelial cells lining the entire mucosal surface give's leaf like texture to mucosa uniform throughout stomach |
gastric foveola
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cells located deep in gastric pits htat have a lower content of mucin granules
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mucous neck sales
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phase of acid secretion initiated by sight, taste, smell, chewing, and swallowing of palatable food
mediated by vagal activity |
cephalic phase
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phase of acid secretion that involves stimulation of stretch receptors
mediated by vagal impulse involves gastrin release from the endocrine cells, G cells, in the antral glands |
gastric phase
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phase of acid secretion initiated when food containing digested protein enters the proximal small bowel
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the intestinal phase
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receptor stimulated by acetyl choline released from cephalic-vagal ro gastric-vagal afferents
results in increase in cytosolic Ca and activation of proton pump in the parietal cell |
muscarine 3 cholinergic receptor
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role of oxyntic gland ECL cell in acid secretion
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gastrin + vagal afferents cause histamine release which activates H2 receptors on the parietal cell
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superficial damage limited to the mucosa can heal in
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hours to days
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damage that extends to the submucosa can heal in
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weeks to months
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most common infection world wide
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chronic infection of the gastric mucosa by H. pylori
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nodules of essentially normal pancreatic tissue up to 1 cm in diameter is present in the gastric submucosa, muscle wall, or at subserosal location
small patches of ectopic gastric mucosa in the duodenum or in more distal sites may be present as perplexing sources of bleeding |
pancreatic heterotopia
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rupture of abdominal contents into thorax
may be asymptomatic or may engender potentially lethal respiratory problems |
diaphragmatic hernia
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mildest form involves moderate edema and slight vascular congestion of the lamina propria
presence of neutrophils above the basement membrane erosion and hemorrhage may develop with increasing severity robust acute inflammatory infiltrate adn extrusion of a fibrin-containing purulent exudate punctate dark spots asymptomatic or epgastric pain, nausea, vomiting, possible overt hemorrhage |
acute gastritis
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presence of chronic mucosal inflammatory changes leading to mucosal atrophy and intestinal metaplasia
absence of erosions background for development of carcinoma |
chronic gastritis
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bacterial adhesin associated with H. Pylori
binds to the fucosylated Lewis B blood group antigen bearing cells |
BabA
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gastritis with high acid production and elevated risk for duodenal ulcer
low IL-1 beta |
antral gastritis
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gastritis followed by multifocal atrophy with lower gastric acid secretion and higher risk for adenocarcinoma
high IL-1 beta |
pangastritis
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presence of autoantibodies to components of gastric gland parietal cells, including antibodies against the acid producing enzyme H+,K+ ATPase
significant risk for developing carcinoma |
autoimmune gastritis
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diffuse mucosal damage of the body-fundic mucosa with less intense to absent antral damage
mucosa is usually reddened and has coarser texture than normal muscosa thickened with rugal folds mimicking early infiltrative lesions active inflammation is signified by the presence of neutrophils within the glandular nad surface epithelial layer |
autoimmune gastritis
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nausea, vomiting, adn upper abdominal discomfort
since parietal cells are never completely destroyed these patients do not develop achlorhydria or pernicious anemia |
autoimmune gastritis
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idiopathic condition that features a prominent eosinophilic infiltrate of the mucosa, muscle wall, or all layers of the stomach, usually in the antral or pyloric region
middle aged women abdominal pain, swelling of the pylorus may produce gastric outlet obstruction steroid therapy is usually effective |
eosinophilic gastritis
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disorder of children that may produce symptoms of diarrhea, vomiting, and growth failure
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allergic gastroenteropathy
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condition in which lymphocytes densely poulate the epithelial layer of the mucosal surface and gastric pits adn suffuse the lamina propria
mostly CD8+ cells 45-60% cases are associated with celiac disease |
lymphocytic gastritis
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presence of intramucosal epithelioid granulomas without Crohn disease, sarcoidosis, infection, a systemic vasculitis, or a reaction to foreign materials
clinically benign narrowing and rigidity of the gastric antrum due to transmural granulomatous inflammation |
granulomatous gastrititis
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gastritis encountered in the setting of a bone marrow transplantation
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graft versus host disease
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longitudinal stripe of edematous erythematous mucosa alternating with less severely injured mucosa
water melon stomach due to chemical injury from cyclooxygenase inhibition or bile reflux and mucosal trauma from prolapse |
reactive gastropathy
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breach in mucosa of the alimentary tract that extends through the muscularis mucosa
usually in the duodenum and stomach |
ulcers
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epithelial disruption within the mucosa but no breach of the muscularis mucosa
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erosions
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cytokines associated with H pylori
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IL-1, IL-6, TNF, IL-8
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enhances gastric acid secretion/duodenal bicarbonate production
T cell and B cell aggregation thrombotic occlusion of surface capillaries promoted by bacterial platelet activating factor damage to mucosa |
H. Pylori infection
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strains of H pylori associated with greater number of organisms in tissue adn severe epithelial damage
increased risk for gastric cancer |
CagA positive
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important gene regulated by CagA
causes cell injury by vacuole formation behaves as a passive urea transporter, increasing permeability of epithelium to urea |
VacA
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pt with duodenal ulcer, the H. pylori infection is limited to the
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stomach
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chronic use of NSAIDs
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suppresses mucosal prostaglandins
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cigarette smoking and ulcers
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impairs mucosal blood flow and healing
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location of most duodenal ulcers
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w/in a few cm of the pyloric ring; anterior wall affected more than posterior wall
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round to oval, sharply punched-out defect with relatively straight walls
scarring may involve entire thickness of stomach; puckering of surrounding mucosa creates mucosal folds-> "spoke like" surrounding mucosa is edematous and reddened |
classical peptic ulcer
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ulcers with four zones:
superficial necrotic fibrinoid debris, non-specific inflammatory infiltrate with neutrophils predominating, active granulationtissue infiltrated with mononuclear leukocytes, and solid fibrous or collagenous scar |
active ulcer
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epigastric gnawing, burning, aching pain
pain worse at night, usually occuring 1-3 hours after meals during the day nausea, vomiting, bloating, belching, significant weight loss occasionally pain referred to back, LUQ, or chest |
peptic ulcer
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time for medically untreated ulcer to heal
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15 years
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time for medically treated ulcer to heal
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few weeks; much less likely to require surgery
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ulcers/erosions encountered in pt with shock, extensive burns, sepsis, or severe trauma
intracranial injury that raises intracranial pressure following intracranial surgery |
stress erosions/ulcers
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stress erosions/ulcers in pt with severe burns/trauma
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curling ulcers
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stress ulcers/erosions in pt with intracranial injury, operations, or tumors
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cushing ulcers
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ulcers less than 1 cm in diameter
circular and small; ulcer base frequently stained brown by digestion of extruded blood abrupt lesions with essentiall unremarkable adjacent mucosa |
stress ulcers
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condition arising from outlet obstruction or functional atony of the stomach and intestines
may develop in pt wtih generalized peritonitis gastric rupture may occur and is a calamatous event |
gastric dilation
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bezoar derived from plant material
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phytobezoar
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bezoars better known as hairballs
consist of ingested hair within mucoid coat containign decaying food stuff |
trichobezoars
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hyperplasia of mucosal epithelial cells without inflammation
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rugal enlargement
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profound hyperplasia of surface mucous cells with accompanying glandular atrophy
most often encountered in males in fourth to sixth decade epigastric discomfort, diarrhea, weight loss, sometimes bleeding |
menetrier disease
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hyperplasia of parietal and chief cells within gastric glands
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hypertrophic-hypersecretory gastropathy
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portal hypertension
masslike nodular and tortuous winding elevations of the mucosa in the cardia or fundus difficult to distinguish from rugae |
gastric varices
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any nodule or mass that projects above the level of surrounding mucosa
non neoplastic or neoplastic |
gastric polyp (uncommon)
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polyp like lesion that contains proliferative dysplastic epithelium and malignant potential
may be sessile (no stalk) or pedunculated (stalk) most common location is antrum; usually single |
gastric adenoma
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polyp that is innocuous cystic dilation of glands in the oxyntic mucosa
occur with familial adenomatous polyposis exhibit mutations in beta catenin |
fundic polyps
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striking lesion that is a bulky submucosal growth composed of inflamed vascularized fibromuscular tissue with prominent eosinophilic infiltrate and a tenuous mucosa stretched over the surface
most frequently found in distal stomach may occlude pyloric channel |
inflammatory fibroid polyp/eosinophilic granuloma
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leading cause of cancer death worldwide
higher incidence in men (2:1) associated strongly with chronic H. pylori infection which causes oxidative stress lack of refrigeration; consumption of preserved, smoked, cured, and salted foods; water contamination with nitrates; lack of fresh fruits and vegetables in diet |
gastric carcinoma
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gastric carcinoma with formation of bulky tumors composed of glandular structures
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Lauren gastric carcinoma (intestinal)
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gastric carcinoma with diffuse infiltrative growth of poorly differentiated discohesive malignant cells
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Diffuse gastric carcinoma
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Higher risk in Native Americans and Hawaiians
favored location is lesser curvature of antropyloric region; although less common ulcerative lesion on greater curvature more likely to be malignant may be confined to mucosa/submucosa (early) or extend beyond submucosa to muscular wall (advanced) craters may be identified with heaped up beaded margins adn shaggy, necrotic bases; overt neoplastic tissue extending to surrounding mucosa wall |
gastric carcinoma
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gastric carcinoma with protrusion of a tumor mass into the lumen
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exophytic
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gastric carcinoma in which there is no obvious tumor mass within mucosa
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flat/depressed
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gastric carcinoma in which shallow or deeply erosive crater is present in wall of stomach
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excavated
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broad region of gastric wall or entire stomach is extensively infiltrated by malignancy
rigid, thickned, "leather bottle" |
linitis plastica in gastric carcinoma
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neoplastic intestinal glands resembling colonic adenocarcinoma
tend to grow along broad cohesive fronts in expanding growth pattern mucin formation expands the malignant cells and pushes the nucleus to the periphery-> signet ring conformation |
diffuse variant gastric carcinoma
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node gastric carcinomas frequently metastasize to as first clinical manifestation
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supraclavicular
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gastric carcinoma that metastasizes to the periumbilical region to form subcutaneous nodule
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Sister Mary Joseph nodule
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metastatic adenocarcinoma to the ovaries
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Krukenberg tumor
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generally asymptomatic until late in course
weight loss, abdominal pain, anorexia, vomiting, altered bowel habits, dysphagia, anemia, hemorrhage |
gastric carcinoma
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tumor commonly occuring in the mucosa or superficial submucosa
monomorphic lymphocytic infiltrate of the lamina propria surrounds gastric glands massively infiltrated with atypical lymphocytes and undergoing destruction |
gastric lymphoma
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tumor thought to originate from interstitial cells of Cajal
cut surface is tan and usually lacks whirling smooth muscle patterns of leiomyomas or leiomyosarcomas firm to soft; hemorrhagic changes common spindle cells, plump "epithelioid cells or mixture" c-KIT positive |
gastrointestinal stromal tumor (GIST)
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originate from ECL cells in oxyntic mucosa
can arise in setting of chronic atrophic gastritis, MEN1, or zollinger Ellison hypergastrinemic state |
gastric neuroendocrine cell (carcinoid) tumor
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benign neoplasm of adipose tissue that usually present in submucosa
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lipomas
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although metastatic cancer of stomach is unusual the most common sources are
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systemic lymphomas
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