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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
narrow conical portion of stomach immediately distal to gastroesophageal junction
cardia
dome shaped portion of the proximal stomach that extends superolateral to the gastroesophageal junction
fundus
stomach proximal to the incisura angularis
body/corpora
stomach distal to the angle
antrum
infoldings of mucosa and submucosa that extend longitudinally

most prominent in the proximal stomach

flatten out if the stomach
rugae
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
cells located deep in gastric pits htat have a lower content of mucin granules
mucous neck sales
phase of acid secretion initiated by sight, taste, smell, chewing, and swallowing of palatable food

mediated by vagal activity
cephalic phase
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
phase of acid secretion initiated when food containing digested protein enters the proximal small bowel
the intestinal phase
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
role of oxyntic gland ECL cell in acid secretion
gastrin + vagal afferents cause histamine release which activates H2 receptors on the parietal cell
superficial damage limited to the mucosa can heal in
hours to days
damage that extends to the submucosa can heal in
weeks to months
most common infection world wide
chronic infection of the gastric mucosa by H. pylori
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
rupture of abdominal contents into thorax

may be asymptomatic or may engender potentially lethal respiratory problems
diaphragmatic hernia
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
presence of chronic mucosal inflammatory changes leading to mucosal atrophy and intestinal metaplasia

absence of erosions

background for development of carcinoma
chronic gastritis
bacterial adhesin associated with H. Pylori

binds to the fucosylated Lewis B blood group antigen bearing cells
BabA
gastritis with high acid production and elevated risk for duodenal ulcer

low IL-1 beta
antral gastritis
gastritis followed by multifocal atrophy with lower gastric acid secretion and higher risk for adenocarcinoma

high IL-1 beta
pangastritis
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
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
nausea, vomiting, adn upper abdominal discomfort

since parietal cells are never completely destroyed these patients do not develop achlorhydria or pernicious anemia
autoimmune gastritis
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
disorder of children that may produce symptoms of diarrhea, vomiting, and growth failure
allergic gastroenteropathy
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
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
gastritis encountered in the setting of a bone marrow transplantation
graft versus host disease
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
breach in mucosa of the alimentary tract that extends through the muscularis mucosa

usually in the duodenum and stomach
ulcers
epithelial disruption within the mucosa but no breach of the muscularis mucosa
erosions
cytokines associated with H pylori
IL-1, IL-6, TNF, IL-8
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
strains of H pylori associated with greater number of organisms in tissue adn severe epithelial damage

increased risk for gastric cancer
CagA positive
important gene regulated by CagA

causes cell injury by vacuole formation

behaves as a passive urea transporter, increasing permeability of epithelium to urea
VacA
pt with duodenal ulcer, the H. pylori infection is limited to the
stomach
chronic use of NSAIDs
suppresses mucosal prostaglandins
cigarette smoking and ulcers
impairs mucosal blood flow and healing
location of most duodenal ulcers
w/in a few cm of the pyloric ring; anterior wall affected more than posterior wall
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
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
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
time for medically untreated ulcer to heal
15 years
time for medically treated ulcer to heal
few weeks; much less likely to require surgery
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
stress erosions/ulcers in pt with severe burns/trauma
curling ulcers
stress ulcers/erosions in pt with intracranial injury, operations, or tumors
cushing ulcers
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
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
bezoar derived from plant material
phytobezoar
bezoars better known as hairballs

consist of ingested hair within mucoid coat containign decaying food stuff
trichobezoars
hyperplasia of mucosal epithelial cells without inflammation
rugal enlargement
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
hyperplasia of parietal and chief cells within gastric glands
hypertrophic-hypersecretory gastropathy
portal hypertension

masslike nodular and tortuous winding elevations of the mucosa in the cardia or fundus

difficult to distinguish from rugae
gastric varices
any nodule or mass that projects above the level of surrounding mucosa

non neoplastic or neoplastic
gastric polyp (uncommon)
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
polyp that is innocuous cystic dilation of glands in the oxyntic mucosa

occur with familial adenomatous polyposis

exhibit mutations in beta catenin
fundic polyps
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
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
gastric carcinoma with formation of bulky tumors composed of glandular structures
Lauren gastric carcinoma (intestinal)
gastric carcinoma with diffuse infiltrative growth of poorly differentiated discohesive malignant cells
Diffuse gastric carcinoma
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
gastric carcinoma with protrusion of a tumor mass into the lumen
exophytic
gastric carcinoma in which there is no obvious tumor mass within mucosa
flat/depressed
gastric carcinoma in which shallow or deeply erosive crater is present in wall of stomach
excavated
broad region of gastric wall or entire stomach is extensively infiltrated by malignancy

rigid, thickned, "leather bottle"
linitis plastica in gastric carcinoma
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
node gastric carcinomas frequently metastasize to as first clinical manifestation
supraclavicular
gastric carcinoma that metastasizes to the periumbilical region to form subcutaneous nodule
Sister Mary Joseph nodule
metastatic adenocarcinoma to the ovaries
Krukenberg tumor
generally asymptomatic until late in course

weight loss, abdominal pain, anorexia, vomiting, altered bowel habits, dysphagia, anemia, hemorrhage
gastric carcinoma
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
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)
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
benign neoplasm of adipose tissue that usually present in submucosa
lipomas
although metastatic cancer of stomach is unusual the most common sources are
systemic lymphomas