GI Flashcards
3 Salivary gland tumors
- Pleomorphic adenoma
- Mucoepidermoid carcinoma
- Warthin tumor
most common malignant tumor of salivary gland
Mucoepidermoid carcinoma
Salivary gland’s benign cystic tumor with germinal centers.
Warthin tumor
Most common salivary gland tumor
Pleomorphic adenoma
Cancer (obstruction) cause dysphagia to solids or liq?
Solids –>liq (Achalasia cause liq–>solids)
Achalasia increase risk of which cancer?
Squamous cell carcinoma of esophagus
Endoscopy of Eosinophilic esophagitis shows?
Esophageal rings and linear furrows
Eosinophilic esophagitis main symptom?
Dysphagia
Varices located in what part of esophagus?
lower 1 ⁄3 of esophagus
HSV-1 appearance in esophagitis infection?
punched-out ulcers
CMV appearance in esophagitis infection?
linear ulcers
Esophagitis caused by?
- reflux
- infection in immunocompromised
- caustic ingestion
- meds
Candida infection of esophagus (esophagitis) appearance?
white pseudomembrane
GERD associated with?
Associated with asthma
Plummer-Vinson syndrome triad?
Triad of Dysphagia, Iron deficiency anemia, and Esophageal webs.
(“Plumbers” DIE).
Plummer-Vinson syndrome increase risk of which esophageal cancer?
Increased risk of esophageal squamous cell carcinoma “Plumbers” DIE
Sclerodermal esophageal dysmotility
Smooth muscle atrophy & decreased LES pressure–>dysmotility/reflux/dysphagia
Acute gastritis 3 causes?
- NSAIDs
- Burns (Curling ulcer)
- Brain injury (Cushing ulcer)
Chronic gastritis 2 causes?
- H Pylori
2. AI-Pernicious anemia
Ménétrier disease MOA
Gastric hyperplasia of mucosa, parietal cell atrophy–can’t make acid
Acid is made by which cells in stomach?
Parietal
Parietal cells provide what 2 things in stomach?
- IF
2. Acid
Gastric cancer types
- gastric adenocarcinoma
- lymphoma
- GI stromal tumor
- carcinoid
- Intestinal
- Diffuse
Leser-Trélat sign is?
Sudden multiple seborrheic keratoses caused by stomach CA
Most commonly gastric CA?
adenocarcinoma
Rarest stomach CA?
carcinoid
Stomach CA associated with H. Plyori?
Intestinal
signet ring cells & linitis plastica associated with which kind of stomach CA?
Diffuse
Signet ring cells
mucin-filled cells with peripheral nuclei
Linitis plastica
stomach wall grossly thickened and leathery
involvement of left supraclavicular node by metastasis from stomach.
Virchow node
Bilateral metastases to ovaries. Abundant mucin-secreting, signet ring cells.
Krukenberg tumor
Subcutaneous periumbilical mets from stomach?
Sister Mary Joseph nodule
Most common cause of both stomach and duodenal ulcers?
H Pylori infection
In addition to H Pylori, stomach ulcers also caused by?
NSAIDs
In addition to H Pylori, duodenal ulcers also caused by?
ZES
Symptoms in perforation of stomach or duodenal ulcer?
- Free air under diaphragm
- Referred pain to shoulder (via phrenic n)
3 Ulcer complications
- Hemorrhage
- Obstruction
- Perforation
Pancreatic insufficiency causes malabsorption of?
- fat
- fat-soluble vitamins (A, D, E, K)
- B12.
Difference between Tropical Sprue & Celiac ?
Responds to Abx.
Tropical sprue assoc. w/ what anemia type?
megaloblastic anemia due to folate deficiency and, later, B12 deficiency
PAS ⊕
Whipple disease
Foamy macrophages in intestinal lamina propria
Whipple disease
Whipple disease 3 sxs.? (Mnemonic)
- Cardiac
- Arthralgias, and
- Neurologic
“Foamy Whipped cream in a CAN”
Whipple disease MOA
Infection with Tropheryma whipplei (intracellular gram ⊕)
Rectum v Anus?
Rectum –>Anus (outside)
IBS: Recurrent abdominal pain associated with ≥ 2 of the following:
- Pain improves with defecation
- Change in stool frequency
- Change in appearance of stool
Cause of appendicitis in kids?
lymphoid hyperplasia
Initial pain location in appendicitis?
Initial diffuse periumbilical pain migrates to McBurney point (1 ⁄3 the distance from right anterior superior iliac spine to umbilicus).
McBurney point
1 ⁄3 the distance from right anterior superior iliac spine to umbilicus
Sxs. Appendicitis?
- Pain,
- Nausea,
- fever
Physical signs with appendicitis?
- psoas,
- obturator, and
- Rovsing signs
Rovsing’s sign=
Pain in right lower abdomen w/ palpation left abdomen.
Appendicitis Ddx.
Differential: diverticulitis (elderly), ectopic pregnancy (use β-hCG to rule out).
“True” diverticulum definition?
all 3 gut wall layers outpouch
Meckel is true or fake diverticulum?
True
“False” diverticulum or pseudodiverticulum—
only mucosa and submucosa outpouch. Occur especially where vasa recta perforate muscularis externa.
MC location of diverticulum?
Most often in sigmoid colon.
Sxs. of diverticulosis?
- Often asymptomatic or
- vague discomfort
- bleeding (painless hematochezia),
- diverticulitis.
Melena is?
black, tarry stools.
Hematochezia is?
brb fresh blood per anus, usually in or with stools.
Complications of diverticulitis?
- Abscess
- Fistula (colovesical fistula=pneumaturia)
- Obstruction (inflammatory stenosis)
- Perforation –>peritonitis
Zenker is true or pseudo diverticulum?
Pseudo
Zenker diverticulum location?
Pharyngoesophageal
Zenker diverticulum sxs? (mnemonic)
“Elder MIKE has bad breath”
Elderly
Males
Inferior pharyngeal constrictor
Killian triangle
Esophageal dysmotility
Halitosis
Vitelline duct?
a long narrow tube that joins the yolk sac to the midgut lumen of the developing fetus.
Location of Meckel’s diverticulum?
distal ileum, usually within 60–100 cm (2 feet) of the ileocecal valve
Meckel’s Mnemonic?
"The six 2’s": 2 times as likely in males. 2 inches long. 2 feet from the ileocecal valve. 2% of population. first 2 years of life. 2 types of epithelia (gastric/ pancreatic).
Risk for Hirschsprung is increased with what condition?
Down’s Syndrome
Hirschsprung disease associated with mutations in what gene?
RET
characterized by lack
of ganglion cells/enteric nervous plexuses (Auerbach and Meissner plexuses) in distal segment of colon.
Hirschsprung
Hirschsprung MOA
Due to failure of neural crest cell migration.
Normal portion of the colon proximal to the aganglionic segment is dilated, resulting in a “transition zone.”
Hirschsprung
Failure to pass meconium within 48 hours
Hirschsprung
Hirschsprung 3 sxs.
- bilious emesis,
- abdominal distention
- failure to pass meconium in 48 hrs.
Anomaly of midgut rotation during fetal development
Malrotation
Ladd bands?
fibrous bands in Malrotation
Malrotation can lead to what 2 conditions?
volvulus, duodenal obstruction.
Twisting of portion of bowel around its mesentery;
lead to obstruction and infarction
Volvulus
Volvulus type more common in elderly?
Sigmoid volvulus (v. midgut in infants/kids)
Intussusception MOA?
Telescoping A of proximal bowel segment into distal segment
Intussusception location?
commonly at ileocecal junction
Most common pathologic lead point to form Intussusception?
Meckel diverticulum
Bull’s-eye appearance on ultrasound.
Intussusception
Intussusception in adults due to?
associated with intraluminal mass or tumor that acts as lead point that
is pulled into the lumen
Intussusception seen after what illness MC?
adenovirus
“Currant jelly” stools in what 2 conditions?
- Intussusception
2. Acute mesenteric ischemia
POOP
Acute mesenteric ischemia
Acute mesenteric ischemia due to occlusion of what BV?
Superior mesenteric artery (SMA)
Chronic mesenteric ischemia sxs.?
postprandial Crampy epigastric pain followed by hematochezia.
“Intestinal angina”
Chronic mesenteric ischemia MOA
atherosclerosis of celiac artery, SMA, or IMA
Commonly occurs at watershed areas (splenic flexure, distal colon)
Colonic ischemia
Tortuous dilation of vessels causing hematochezia
Angiodysplasia
Angiodysplasia MC where?
Most often found in cecum, terminal ileum, ascending colon
Angiodysplasia Dg.?
angiography
Most common cause of small bowel obstruction
Adhesion
Intestinal hypomotility without obstruction
Ileus
Ileus sxs.
constipation and decrflatus; distended/tympanic abdomen with decrbowel sounds
Ileus causes
abdominal surgeries, opiates, hypokalemia, sepsis
Ileus tx.?
Treatment: bowel rest, electrolyte correction, cholinergic drugs (stimulate intestinal motility).
Meconium ileus occurs in?
CF
Seen in premature, formula-fed infants with immature immune system.
Necrotizing enterocolitis
meconium plug obstructs intestine, preventing stool passage at birth.
Meconium ileus
Necrosis of intestinal mucosa (primarily colonic) with possible perforation, which can lead to pneumatosis intestinalis
Necrotizing enterocolitis