Gastrointestinal Flashcards
Ilioinguinal nerve
Sensory,L1 carries sensation from skin of medial and upper part of thigh, root of penis and upper scrotum, mons pubis, labia majora in females
Inferior gluteal nerve
L5.S1.S2
Motor to gluteus maximus
Inferior hypogastric plexus
Both syn and parasym supplies internal pelvic viscera but not external perirectal area
Pelvic splanchic nerves
S2.s3.s4 parasym to pelvic and genital organs
Gastrin
G cell in antrum stomach , duodenem
Inc gastric acid secretion, gastric growth, gastric motility
Inc by stomach distention/alkalisation ,AA, vagal stimulation via GRP
Decrease by pH <1.5
Stomatostatin
D cells (pancreatic islets, GI mucosa)
Decrease gastric acid
Dec pancreatic and small intestine secretion
Decrease gb contraction
Dec insulin and glucogan release
Inc by acid
Dec by vagal stimulation
Cholecystokinin
I cells (duodenem, jejunum
Inc pancreatic secretion
Inc gb contract
Dec gastric empty
Inc sphincter of oddi relaxation
Inc by fa and AA
Secretin
S cells , (duodenum)
Inc pancretic HCO3
Dec ga secretion
Inc bile secretion
Inc by acid FA in lumen of duodenem
Glucose dependent insulinotropic pepetide
K cells
Dec gastric H SEcretion
Inc insulin release
Inc by FA , AA and oral glucose
VIP
inc by distention and vagal
Dec by adrenergic stimulation
Ghrelin
Inc appetite and wt gain
Inc by fasting upto food intake and
Dec by intake /food
Caloric restriction/falling fat stores
Inc ghrelin and dec leptin and insulin
Parietal cells
Eosinophilic cytoplasm
Intrinsic factor and gastric acid
Gastric acid inc
By histamine, vagal, gastrin
Dec by somatostatin GIP PROSTAGLANDINS SECRETIN
Pepsin
Chief cells
Small basophilic granular
Bicarbonate
Mucosal cells of stomach duodenem salivary and pancreas
Brunner gland of duodenem
Eosinophil esophagitis hx
Eosinophils rings and linear furrows on endoscopy scattered whitish small papules
Esophageal perforation
Crunching sounds(hamman sign)
Fever sepsis odynophagia
Ct with water soluble contrast
Esophagography
Boerhaave syndrome
Transmural rupture distal rupture d/t biolent retching
Esophagitis hx
Esinophilic intranuclear inclusions (cowdry tyoe A) in multinuclear sq cells at ulcer margin
Candida-pseudomembrane white, grey white erythematous mucosa tx fluconazole
Hsv1 ulcer
Punched out
Cmv ulcer
Linear . Intranuclear cytoplasmic inclusions
Esophagitis pills
Bisphosphanate tetracycline NSAIDS iron KCL
Mallory weis
Linear ulcers to mucosa and submucosa
Plummer vinson
Dysphagia
Fe def
Esophageal webs
Inc risk of sq cell ca
Scelroderma esophgeal dysmotility
Decrease LES
Manometry dec paratylsis
Refex eophagitis
Elongation of papillae .basal cell hypertrophy .intraepithelial eosinophils
Barret esophagus
Non keratinised Stratified sq epi
Replaced by
Nonciliated columnar with goblet cells
Barret inc type of CA
AdenoCA
Ovoid polyhedral Sheets of eosinophilic cells ,keratin pearls intracellular bridges
Squamous cell cancer eophagous
African middle age >50yrs
Upper 2/3
AdenoCA Esophagous hx
1/3 ulcerated exophytic
Massive patches of dysplastic mucin producing cells form glands
Sq cell ca esophagous hx
Sq cells with eosinophilic cytoplasm large bizarre nuclei atypical mitosis malignant cell invading invading submucosa and surrounding structures
Burn ulcers
Curling